auto-update week 34

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Yo Robot 2024-08-22 22:21:22 +00:00
parent ebc576bc61
commit 826cda17b4
12 changed files with 61 additions and 64 deletions

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},
"Terrorism": {
"Terrorist group(s)": {
"text": "al-Qaida (Jamaat Nusrat al Islam wal Muslimeen); Islamic State in the Greater Sahara (ISIS-GS); Boko Haram",
"text": "Jamaat Nusrat al Islam wal Muslimeen (JNIM); Islamic State in the Greater Sahara (ISIS-GS); Boko Haram",
"note": "<strong>note:</strong> details about the history, aims, leadership, organization, areas of operation, tactics, targets, weapons, size, and sources of support of the group(s) appear(s) in the Terrorism reference guide"
}
},

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@ -627,7 +627,7 @@
},
"Diplomatic representation from the US": {
"chief of mission": {
"text": "Ambassador John T. GODFREY (since 1 September 2022)"
"text": "Charg&eacute; d'Affaires Daniel RUBENSTEIN (since March 2024)"
},
"embassy": {
"text": "P.O. Box 699, Kilo 10, Soba, Khartoum"

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@ -1202,7 +1202,7 @@
"Military and Security": {
"Military and security forces": {
"text": "Australian Defense Force (ADF): Australian Army, Royal Australian Navy, Royal Australian Air Force (2024)",
"note": "<strong>note 1: </strong>the Army includes a Special Operations Command, while the Navy includes a Naval Aviation Force<br><br><strong>note 2:</strong> the Australian Federal Police is an independent agency of the Attorney-Generals Department; it, along with state and territorial police forces are responsible for internal security; the Australian Border Force is under the Department of Home Affairs"
"note": "<strong>note: </strong>the Australian Federal Police (AFP) is an independent agency of the Attorney-Generals Department; the AFP, state, and territorial police forces are responsible for internal security; the Australian Border Force is under the Department of Home Affairs"
},
"Military expenditures": {
"Military Expenditures 2023": {
@ -1236,7 +1236,7 @@
"text": "<strong>note: </strong>the number of Australian military forces varies by mission; since the 1990s, Australia has deployed more than 30,000 personnel on nearly 100 UN peacekeeping and coalition military operations around the World"
},
"Military - note": {
"text": "Australia has been part of the Australia, New Zealand, and US Security (ANZUS) Treaty since 1951; Australia is also a member of the Five Powers Defense Arrangements (FPDA), a series of mutual assistance agreements reached in 1971 embracing Australia, Malaysia, New Zealand, Singapore, and the UK<br><br>Australia has long-standing bi-lateral defense and security ties to the UK, including defense and security cooperation treaties in 2024 and 2013; in 2020, Australia and the UK signed a memorandum of understanding to cooperate on the building of a next generation of frigates for their respective navies; the Australia-UK Ministerial Consultations (AUKMIN) is their premier bilateral forum on foreign policy, defense, and security issues <br><br>Australia also has a long-standing military relationship with the US; Australian and US forces first fought together in France in 1918 and have fought together in every major US conflict since; Australia and the US signed an agreement in 2014 that allowed for closer bi-lateral defense and security cooperation, including rotations of US military forces and equipment to Australia; Australian military forces train often with US forces; Australia has Major Non-NATO Ally (MNNA) status with the US, a designation under US law that provides foreign partners with certain benefits in the areas of defense trade and security cooperation <br><br>in 2021, Australia, the UK, and the US announced an enhanced trilateral security partnership called “AUKUS” which would build on existing bilateral ties, including deeper integration of defense and security-related science, technology, industrial bases, and supply chains, as well as deeper cooperation on a range of defense and security capabilities; the first initiative under AUKUS was a commitment to support Australia in acquiring conventionally armed nuclear-powered submarines for the Royal Australian Navy<br><br>the ADF's missions include protecting Australias borders and maritime interests, responding to domestic natural disasters, and deploying overseas for humanitarian, peacekeeping, and other security-related missions; it regularly participates in bi-lateral and multi-lateral exercises with foreign militaries (2024)"
"text": "Australia has been part of the Australia, New Zealand, and US Security (ANZUS) Treaty since 1951; Australia is also a member of the Five Powers Defense Arrangements (FPDA), a series of mutual assistance agreements reached in 1971 embracing Australia, Malaysia, New Zealand, Singapore, and the UK<br><br>Australia has long-standing bi-lateral defense and security ties to the UK, including defense and security cooperation treaties in 2024 and 2013; in 2020, Australia and the UK signed a memorandum of understanding to cooperate on the building of a next generation of frigates for their respective navies; the Australia-UK Ministerial Consultations (AUKMIN) is their premier bilateral forum on foreign policy, defense, and security issues <br><br>Australia also has a long-standing military relationship with the US; Australian and US forces first fought together in France in 1918 and have fought together in every major US conflict since; Australia and the US signed an agreement in 2014 that allowed for closer bi-lateral defense and security cooperation, including rotations of US military forces and equipment to Australia; Australian military forces train often with US forces; Australia has Major Non-NATO Ally (MNNA) status with the US, a designation under US law that provides foreign partners with certain benefits in the areas of defense trade and security cooperation <br><br>in 2021, Australia, the UK, and the US announced an enhanced trilateral security partnership called “AUKUS” which would build on existing bilateral ties, including deeper integration of defense and security-related science, technology, industrial bases, and supply chains, as well as deeper cooperation on a range of defense and security capabilities; the first initiative under AUKUS was a commitment to support Australia in acquiring conventionally armed nuclear-powered submarines for the Royal Australian Navy<br><br>the ADF's missions include protecting Australias borders and maritime interests, responding to domestic natural disasters, and deploying overseas for humanitarian, peacekeeping, and other security-related missions; it regularly participates in bi-lateral and multi-lateral exercises with foreign militaries; in 2024, it established a cyber command (2024)"
}
},
"Space": {

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@ -591,7 +591,7 @@
"text": "King WACHIRALONGKON, also spelled Vajiralongkorn (since 1 December 2016)"
},
"head of government": {
"text": "Prime Minister SETTHA Thawisin, also spelled SRETTHA Thavisin (since 5 September 2023)"
"text": "Prime Minister Paetongtarn SHINAWATRA (since 18 August 2024)"
},
"cabinet": {
"text": "Council of Ministers nominated by the prime minister, appointed by the king; a Privy Council advises the king"

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@ -42,25 +42,25 @@
},
"Bathymetry": {
"continental shelf": {
"text": "The <em>continental shelf </em>(see Figure 1), a rather flat area of the sea floor adjacent to the coast that gradually slopes down from the shore to water depths of about 200 m (660 ft). Dimensions can vary: they may be narrow or nearly nonexistent in some places or extend for hundreds of miles in others. The waters along the continental shelf are usually productive in both plant and animal life, both from sunlight and nutrients from ocean upwelling and terrestrial runoff. Compared to the <em>continental shelf</em> found in other oceans, in Antarctica the continental shelf is narrower and much deeper. In addition, the <em>continental shelf</em> has been deeply scoured by glacial action. The following are examples of features found on the <em>continental shelf</em> of the Southern Ocean (see Figure 2).<br>Astrid Ridge (see also Figure 4)<br>Belgrano Bank<br>Gunnerus Ridge (see also Figure 4)<br>Hayes Bank<br>Iselin Bank"
"text": "The <em>continental shelf </em>(see Figure 1), a rather flat area of the sea floor adjacent to the coast that gradually slopes down from the shore to water depths of about 200 m (660 ft). Dimensions can vary: they may be narrow or nearly nonexistent in some places or extend for hundreds of miles in others. The waters along the continental shelf are usually productive in both plant and animal life, from sunlight and nutrients from ocean upwelling and terrestrial runoff. In Antarctica, the continental shelf is narrower and much deeper than in other oceans, and glacial action has deeply scoured it. The following are examples of features found on the continental shelf of the Southern Ocean (see Figure 2):<br><br>Astrid Ridge (see also Figure 4)<br>Belgrano Bank<br>Gunnerus Ridge (see also Figure 4)<br>Hayes Bank<br>Iselin Bank"
},
"continental slope": {
"text": "The <em>continental slope</em> (see Figure 1) is where the ocean bottom drops off more rapidly until it meets the deep-sea floor (abyssal plain) at about 3,200 m (10,500 ft) water depth. The deep waters of the continental slope are characterized by cold temperatures, low light conditions, and very high pressures. Sunlight does not penetrate to these depths, having been absorbed or reflected in the water above. The <em>continental slope</em> can be indented by submarine canyons, often associated with the outflow of major rivers. In the case of Antarctica, the <em>continental slope</em> has been scoured by glacial action cutting troughs and canyons down the slope. Another feature of the continental slope are alluvial fans or cones of sediments carried downstream to the ocean by major rivers and deposited down the slope. The following are examples of features found on the <em>continental slope</em> of the Southern Ocean (see Figure 2).<br>Amery Basin (see also Figure 4)<br>Filchner Trough<br>Hillary Canyon<br>Pobeda Canyon (Figure 3)"
"text": "The <em>continental slope</em> (see Figure 1) is where the ocean bottom drops off until it meets the deep-sea floor (<em>abyssal plain</em>) at about 3,200 m (10,500 ft) water depth. The deep waters of the continental slope are characterized by cold temperatures, low light conditions, and very high pressures. Sunlight does not penetrate to these depths, having been absorbed or reflected in the water above. The continental slope can be indented by submarine canyons, which are often associated with the outflow of major rivers. Another feature of the continental slope is alluvial fans, or cones of sediments, that major rivers carry downstream to the ocean and deposit down the slope. In the case of Antarctica, glacial action has scoured the continental slope, cutting troughs and canyons. <br><br>The following are examples of features found on the continental slope of the Southern Ocean (see Figure 2):<br><br>Amery Basin (see also Figure 4)<br>Filchner Trough<br>Hillary Canyon<br>Pobeda Canyon (Figure 3)"
},
"abyssal plains": {
"text": "The <em>abyssal plains </em>(see Figure 1), at depths of over 3,000 m (10,000 ft) and covering 70% of the ocean floor, are the largest habitat on earth. Sunlight does not penetrate to the sea floor, making these deep, dark ecosystems less productive than those along the continental shelf. Despite their name, these “plains” are not uniformly flat; they are interrupted by features like hills, valleys, and seamounts. The following are examples of features found on the <em>abyssal plains</em> of the Southern Ocean (see Figures 2, 3, and 4).<br>Amundsen (Abyssal) Plain<br>Enderby (Abyssal) Plain<br>South Indian/Australian-Antarctic Basin<br>Southeast Pacific/Bellinghausen Basin<br>Weddell (Abyssal) Plain"
"text": "The <em>abyssal plains </em>(see Figure 1), at depths of over 3,000 m (10,000 ft) and covering 70% of the ocean floor, are the largest habitat on earth. Sunlight does not penetrate to the sea floor, making these deep, dark ecosystems less productive than those along the continental shelf. Despite their name, these “plains” are not uniformly flat; they are interrupted by features like hills, valleys, and seamounts. The following are examples of features found on the abyssal plains of the Southern Ocean (see Figures 2, 3, and 4):<br><br>Amundsen (Abyssal) Plain<br>Enderby (Abyssal) Plain<br>South Indian/Australian-Antarctic Basin<br>Southeast Pacific/Bellinghausen Basin<br>Weddell (Abyssal) Plain"
},
"mid-ocean ridge": {
"text": "The <em>mid-ocean ridge </em>(see Figure 1), rising up from the abyssal plain, is an underwater mountain range, over 64,000 km (40,000 mi) long, rising to an average depth of 2,400 m (8,000 ft). <em>Mid-ocean ridges</em> form at divergent plate boundaries where two tectonic plates are moving apart and new crust is created by magma pushing up from the mantle. Tracing their way around the global ocean, this system of underwater volcanoes forms the longest mountain range on Earth. Fracture Zones are linear transform faults that develop perpendicular to the line of the mid-ocean ridge which can offset the ridge line and divide it into segments. The following are examples of <em>mid-ocean ridges</em> found on the floor of the Southern Ocean (see Figure 2).<br>Pacific-Antarctic Ridge (see also Figure 3)"
"text": "The <em>mid-ocean ridge </em>(see Figure 1), rising up from the abyssal plain, is an underwater mountain range, over 64,000 km (40,000 mi) long, reaching an average depth of 2,400 m (8,000 ft). Mid-ocean ridges form at divergent plate boundaries where two tectonic plates are moving apart and magma pushing up from the mantle creates new crust. Tracing their way around the global ocean, this system of underwater volcanoes forms the longest mountain range on earth. Fracture zones are linear transform faults that develop perpendicular to the line of the mid-ocean ridge, which can offset the ridge line and divide it into segments. <br><br>The following are examples of mid-ocean ridges found on the floor of the Southern Ocean (see Figure 2):<br><br>Pacific-Antarctic Ridge (see also Figure 3)"
},
"undersea terrain features": {
"text": "The Abyssal Plain is commonly interrupted by a variety of commonly named undersea terrain features including <em>seamounts</em>, <em>guyots</em>, <em>ridges</em>, and <em>plateaus</em>. <em>Seamounts</em> (see Figure 1) are submarine mountains at least 1,000 m (3,300 ft) high formed from individual volcanoes on the ocean floor. They are distinct from the plate-boundary volcanic system of the mid-ocean ridges, because <em>seamounts</em> tend to be circular or conical. A circular collapse caldera is often centered at the summit, evidence of a magma chamber within the volcano. Flat topped <em>seamounts</em> are known as <em>guyots</em>. Long chains of <em>seamounts</em> are often fed by \"hot spots\" in the deep mantle. These hot spots are associated with stationary plumes of molten rock rising from deep within the Earth's mantle. These hot spot plumes melt through the overlying tectonic plate as it moves and supplies magma to the active volcanic island at the end of the chain of volcanic islands and <em>seamounts</em>. An undersea <em>ridge</em> is an elongated elevation of varying complexity and size, generally having steep sides. An undersea <em>plateau</em> is a large, relatively flat elevation that is higher than the surrounding relief with one or more relatively steep sides. Although submerged, these features can reach close to sea level. The following are examples of <em>undersea terrain features</em> found on the floor of the Southern Ocean (see Figure 2).<br><br>Akopov Seamounts (Figure 3)<br>De Gerlache Seamounts (see also Figure 3, 4)<br>Endurance Ridge (Figure 4)<br>Marie Byrd Seamount (see also Figure 3)<br>Maud Rise (see also Figure 4)<br>Scott Seamounts (see also Figure 3)"
"text": "The abyssal plain is commonly interrupted by a variety of undersea terrain features including <em>seamounts</em>, <em>guyots</em>, <em>ridges</em>, and <em>plateaus</em>. <br><br><em>Seamounts</em> (see Figure 1) are submarine mountains at least 1,000 m (3,300 ft) high formed from individual volcanoes on the ocean floor. They are distinct from the plate-boundary volcanic system of the mid-ocean ridges, because seamounts tend to be circular or conical. A circular-collapse caldera is often centered at the summit, evidence of a magma chamber within the volcano. \"Hot spots\" in the deep mantle often feed long chains of seamounts. These hot spots are associated with stationary plumes of molten rock rising from deep within the Earth's mantle. The hot-spot plumes melt through the overlying tectonic plate as it moves and supplies magma to the active volcanic island at the end of the chain of volcanic islands and seamounts. <br><br>Flat topped seamounts are known as <em>guyots</em>. <br><br>An undersea <em>ridge</em> is an elongated elevation of varying complexity and size, generally having steep sides. <br><br>An undersea <em>plateau</em> is a large, relatively flat elevation that is higher than the surrounding relief with one or more relatively steep sides. Although submerged, these features can reach close to sea level. <br><br>The following are examples of undersea terrain features found on the floor of the Southern Ocean (see Figure 2):<br><br>Akopov Seamounts (Figure 3)<br>De Gerlache Seamounts (see also Figure 3, 4)<br>Endurance Ridge (Figure 4)<br>Marie Byrd Seamount (see also Figure 3)<br>Maud Rise (see also Figure 4)<br>Scott Seamounts (see also Figure 3)"
},
"ocean trenches": {
"text": "<em>Ocean trenches</em> (see Figure 1) are the deepest parts of the ocean floor and are created by the process of subduction. Trenches form along convergent boundaries where tectonic plates are moving toward each other, and one plate sinks (is subducted) under another. The location where the sinking of a plate occurs is called a subduction zone. Subduction can occur when oceanic crust collides with and sinks under (subducts) continental crust resulting in volcanic, seismic, and mountain-building processes. Subduction can also occur in the convergence of two oceanic plates where one will sink under the other and in the process create a deep ocean trench. Subduction processes in oceanic-oceanic plate convergence also result in the formation of volcanoes. Over millions of years, the erupted lava and volcanic debris pile up on the ocean floor until a submarine volcano rises above sea level to form a volcanic island. Such volcanoes are typically strung out in chains called island arcs. As the name implies, volcanic island arcs, which closely parallel the trenches, are generally curved. The following are examples of <em>ocean trenches</em> found on the floor of the Southern Ocean (see Figure 2).<br>South Sandwich Trench (also see Figure 4); note - the deepest location in the Southern Ocean"
"text": "<p><em>Ocean trenches</em> (see Figure 1) are the deepest parts of the ocean floor and are created by the process of subduction. Trenches form along convergent boundaries where tectonic plates are moving toward each other, and one plate sinks (is subducted) under another. The location where the sinking of a plate occurs is called a subduction zone. Subduction can occur when oceanic crust collides with and sinks under (subducts) continental crust resulting in volcanic, seismic, and mountain-building processes. Subduction can also occur in the convergence of two oceanic plates where one will sink under the other and in the process create a deep ocean trench. <br><br>Subduction processes in oceanic-to-oceanic plate convergence also result in the formation of volcanoes. Over millions of years, the erupted lava and volcanic debris pile up on the ocean floor until a submarine volcano rises above sea level to form a <em>volcanic island</em>. Such volcanoes are typically strung out in curved chains called island arcs.<br><br>The following are examples of ocean trenches found on the floor of the Southern Ocean (see Figure 2):<br><br>South Sandwich Trench (also see Figure 4); note - the deepest location in the Southern Ocean</p>"
},
"atolls": {
"text": "note - due to the extremely cold water there are no atolls in the Southern Ocean"
"text": "due to the extremely cold water there are no atolls in the Southern Ocean"
}
},
"Elevation": {
@ -74,7 +74,7 @@
"text": "-3,270 m"
},
"ocean zones": {
"text": "Composed of water and in a fluid state, the ocean is delimited differently than the solid continents. The ocean is divided into three zones based on depth and light level. Although some sea creatures depend on light to live, others can do without it. Sunlight entering the water may travel about 1,000 m into the oceans under the right conditions, but there is rarely any significant light beyond 200 m.<br><br>The upper 200 m (656 ft) of the ocean is called the euphotic, or \"sunlight,\" zone. This zone contains the vast majority of commercial fisheries and is home to many protected marine mammals and sea turtles. Only a small amount of light penetrates beyond this depth. <br><br>The zone between 200 m (656 ft) and 1,000 m (3,280 ft) is usually referred to as the \"twilight\" zone, but is officially the dysphotic zone. In this zone, the intensity of light rapidly dissipates as depth increases. Such a minuscule amount of light penetrates beyond a depth of 200 m that photosynthesis is no longer possible.<br><br>The aphotic, or \"midnight,\" zone exists in depths below 1,000 m (3,280 ft). Sunlight does not penetrate to these depths and the zone is bathed in darkness."
"text": "Composed of water and in a fluid state, the ocean is delimited differently than the solid continents. It is divided into three zones based on depth and light level. Sunlight entering the water may travel about 1,000 m into the oceans under the right conditions, but there is rarely any significant light beyond 200 m.<br><br>The upper 200 m (656 ft) of the ocean is called the euphotic, or \"sunlight,\" zone. This zone contains the vast majority of commercial fisheries and is home to many protected marine mammals and sea turtles. Only a small amount of light penetrates beyond this depth. <br><br>The zone between 200 m (656 ft) and 1,000 m (3,280 ft) is usually referred to as the \"twilight\" zone, but is officially the dysphotic zone. In this zone, the intensity of light rapidly dissipates as depth increases. Such a minuscule amount of light penetrates beyond a depth of 200 m that photosynthesis is no longer possible.<br><br>The aphotic, or \"midnight,\" zone exists in depths below 1,000 m (3,280 ft). Sunlight does not penetrate to these depths, and the zone is bathed in darkness."
}
},
"Natural resources": {
@ -92,13 +92,13 @@
"text": "changes to the ocean's physical, chemical, and biological systems have taken place because of climate change, ocean acidification, and commercial exploitation"
},
"Environment - international agreements": {
"text": "the Southern Ocean is subject to all international agreements regarding the world's oceans; in addition, it is subject to these agreements specific to the Antarctic region: International Whaling Commission (prohibits commercial whaling south of 40 degrees south [south of 60 degrees south between 50 degrees and 130 degrees west]); Convention on the Conservation of Antarctic Seals (limits sealing); Convention on the Conservation of Antarctic Marine Living Resources (regulates fishing) <p><strong>note:</strong> mineral exploitation except for scientific research is banned by the Environmental Protocol to the Antarctic Treaty; additionally, many nations (including the US) prohibit mineral resource exploration and exploitation south of the fluctuating Polar Front (Antarctic Convergence), which is in the middle of the Antarctic Circumpolar Current and serves as the dividing line between the cold polar surface waters to the south and the warmer waters to the north</p>"
"text": "the Southern Ocean is subject to all international agreements regarding the world's oceans; in addition, it is subject to these agreements specific to the Antarctic region: International Whaling Commission (prohibits commercial whaling south of 40 degrees south [south of 60 degrees south between 50 degrees and 130 degrees west]); Convention on the Conservation of Antarctic Seals (limits sealing); Convention on the Conservation of Antarctic Marine Living Resources (regulates fishing)<br> <p><strong>note:</strong> mineral exploitation except for scientific research is banned by the Environmental Protocol to the Antarctic Treaty; additionally, many nations (including the US) prohibit mineral resource exploration and exploitation south of the fluctuating Polar Front (Antarctic Convergence), which is in the middle of the Antarctic Circumpolar Current and serves as the dividing line between the cold polar surface waters to the south and the warmer waters to the north</p>"
},
"Climate": {
"text": "sea temperatures vary from about 10 degrees Celsius to -2 degrees Celsius; cyclonic storms travel eastward around the continent and frequently are intense because of the temperature contrast between ice and open ocean; the ocean area from about latitude 40 south to the Antarctic Circle has the strongest average winds found anywhere on Earth; in winter the ocean freezes outward to 65 degrees south latitude in the Pacific sector and 55 degrees south latitude in the Atlantic sector, lowering surface temperatures well below 0 degrees Celsius; at some coastal points intense persistent drainage winds from the interior keep the shoreline ice-free throughout the winter"
},
"Marine fisheries": {
"text": "the Southern Ocean fishery is relatively small with a total catch of 388,901 mt in 2021; the Food and Agriculture Organization has delineated three regions in the Southern Ocean (Regions 48, 58, 88) that generally encompass the waters south of 40° to 60° South latitude; the most important producers in these regions include Norway (241,408 mt), China (47,605 mt), and South Korea (39,487 mt); Antarctic Krill made up 95.5% of the total catch in 2021, while other important species include Patagonian and Antarctic toothfish<br><br><strong>Regional fisheries bodies:</strong> Commission for the Conservation of Antarctic Marine Living Resources"
"text": "the Southern Ocean fishery is relatively small with a total catch of 388,901 mt in 2021; the Food and Agriculture Organization has delineated three regions in the Southern Ocean (Regions 48, 58, 88) that generally encompass the waters south of 40° to 60° South latitude; the most important producers in these regions include Norway (241,408 mt), China (47,605 mt), and South Korea (39,487 mt); Antarctic krill made up 95.5% of the total catch in 2021, while other important species include Patagonian and Antarctic toothfish<br><br><strong>Regional fisheries bodies:</strong> Commission for the Conservation of Antarctic Marine Living Resources"
}
},
"Government": {

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"text": "20 00 S, 80 00 E"
},
"Map references": {
"text": "Political Map of the World"
"text": "Map of the world oceans"
},
"Area": {
"total ": {
@ -42,25 +42,25 @@
},
"Bathymetry": {
"continental shelf": {
"text": "<p>The <em>continental shelf </em>(see Figure 1), a rather flat area of the sea floor adjacent to the coast that gradually slopes down from the shore to water depths of about 200 m (660 ft). Dimensions can vary: they may be narrow or nearly nonexistent in some places or extend for hundreds of miles in others. The waters along the continental shelf are usually productive in both plant and animal life, both from sunlight and nutrients from ocean upwelling and terrestrial runoff. The following are examples of features found on the <em>continental shelf</em> of the Indian Ocean (see Figure 2).</p> <p>Exmouth Plateau<br>Indus Canyon <br>The Swatch of No Ground/Ganges Canyon (Bay of Bengal)<br>Sunda Shelf</p>"
"text": "<p>The <em>continental shelf </em>(see Figure 1) is a rather flat area of the sea floor adjacent to the coast that gradually slopes from the shore to water depths of about 200 m (660 ft). Dimensions can vary: the shelves may be narrow or nearly nonexistent in some places or extend for hundreds of miles in others. The waters along the continental shelf are usually productive in both plant and animal life, from sunlight and nutrients from ocean upwelling and terrestrial runoff. The following are examples of features found on the continental shelf of the Indian Ocean (see Figure 2):</p> <p>Exmouth Plateau<br>Indus Canyon <br>The Swatch of No Ground/Ganges Canyon (Bay of Bengal)<br>Sunda Shelf</p>"
},
"continental slope": {
"text": "<p>The <em>continental slope</em> (see Figure 1) is where the ocean bottom drops off more rapidly until it meets the deep-sea floor (abyssal plain) at about 3,200 m (10,500 ft) water depth. The deep waters of the continental slope are characterized by cold temperatures, low light conditions, and very high pressures. Sunlight does not penetrate to these depths, having been absorbed or reflected in the water above. The <em>continental slope</em> can be indented by submarine canyons, often associated with the outflow of major rivers. Another feature of the continental slope are alluvial fans or cones of sediments carried downstream to the ocean by major rivers and deposited down the slope. The following are examples of features found on the <em>continental slope</em> of the Indian Ocean (see Figure 2).</p> <p>Bengal Fan<br>Indus Fan</p>"
"text": "<p>The <em>continental slope</em> (see Figure 1) is where the ocean bottom drops off more rapidly until it meets the deep-sea floor (abyssal plain) at about 3,200 m (10,500 ft) water depth. The deep waters of the continental slope are characterized by cold temperatures, low light conditions, and very high pressures. Sunlight does not penetrate to these depths, having been absorbed or reflected in the water above. The continental slope can be indented by submarine canyons, often associated with the outflow of major rivers. Another feature of the continental slope is alluvial fans, or cones of sediments, that major rivers carry downstream to the ocean and deposit down the slope. The following are examples of features found on the continental slope of the Indian Ocean (see Figure 2):</p> <p>Bengal Fan<br>Indus Fan</p>"
},
"abyssal plains": {
"text": "<p>The <em>abyssal plains </em>(see Figure 1), at depths of over 3,000 m (10,000 ft) and covering 70% of the ocean floor, are the largest habitat on earth. Sunlight does not penetrate to the sea floor, making these deep, dark ecosystems less productive than those along the continental shelf. Despite their name, these “plains” are not uniformly flat; they are interrupted by features like hills, valleys, and seamounts. The following are examples of features found on the <em>abyssal plains</em> of the Indian Ocean (see Figure 2).</p> <p>Arabian Basin<br>Crozet Basin<br>Madagascar Basin<br>Mid-Indian Basin<br>Mozambique Basin<br>Wharton Basin</p>"
"text": "<p>The <em>abyssal plains </em>(see Figure 1), at depths of over 3,000 m (10,000 ft) and covering 70% of the ocean floor, are the largest habitat on earth. Sunlight does not penetrate to the sea floor, making these deep, dark ecosystems less productive than those along the continental shelf. Despite their name, these “plains” are not uniformly flat; they are interrupted by features like hills, valleys, and seamounts. The following are examples of features found on the abyssal plains of the Indian Ocean (see Figure 2):</p> <p>Arabian Basin<br>Crozet Basin<br>Madagascar Basin<br>Mid-Indian Basin<br>Mozambique Basin<br>Wharton Basin</p>"
},
"mid-ocean ridge": {
"text": "<p>The <em>mid-ocean ridge </em>(see Figure 1), rising up from the abyssal plain, is an underwater mountain range, over 64,000 km (40,000 mi) long, rising to an average depth of 2,400 m (8,000 ft). <em>Mid-ocean ridges</em> form at divergent plate boundaries where two tectonic plates are moving apart and new crust is created by magma pushing up from the mantle. Tracing their way around the global ocean, this system of underwater volcanoes forms the longest mountain range on Earth. Fracture Zones are linear transform faults that develop perpendicular to the line of the mid-ocean ridge which can offset the ridge line and divide it into segments. The following are examples of <em>mid-ocean ridges</em> found on the floor of the Indian Ocean (see Figure 2).</p> <p>Central Indian Ridge<br>Davie Ridge<br>Southeast Indian Ridge<br>Southwest Indian Ridge</p>"
"text": "<p>The <em>mid-ocean ridge </em>(see Figure 1), rising up from the abyssal plain, is an underwater mountain range over 64,000 km (40,000 mi) long, reaching an average depth of 2,400 m (8,000 ft). Mid-ocean ridges form at divergent plate boundaries where two tectonic plates are moving apart and magma pushing up from the mantle creates new crust. Tracing their way around the global ocean, this system of underwater volcanoes forms the longest mountain range on Earth. Fracture zones are linear transform faults that develop perpendicular to the line of the mid-ocean ridge, which can offset the ridge line and divide it into segments. The following are examples of mid-ocean ridges found on the floor of the Indian Ocean (see Figure 2):</p> <p>Central Indian Ridge<br>Davie Ridge<br>Southeast Indian Ridge<br>Southwest Indian Ridge</p>"
},
"undersea terrain features": {
"text": "<p>The Abyssal Plain is commonly interrupted by a variety of commonly named undersea terrain features including <em>seamounts</em>, <em>guyots</em>, <em>ridges</em>, and <em>plateaus</em>. <em>Seamounts</em> (see Figure 1) are submarine mountains at least 1,000 m (3,300 ft) high formed from individual volcanoes on the ocean floor. They are distinct from the plate-boundary volcanic system of the mid-ocean ridges, because <em>seamounts</em> tend to be circular or conical. A circular collapse caldera is often centered at the summit, evidence of a magma chamber within the volcano. Flat topped <em>seamounts</em> are known as <em>guyots</em>. Long chains of <em>seamounts</em> are often fed by \"hot spots\" in the deep mantle. These hot spots are associated with stationary plumes of molten rock rising from deep within the Earth's mantle. These hot spot plumes melt through the overlying tectonic plate as it moves and supplies magma to the active volcanic island at the end of the chain of volcanic islands and <em>seamounts</em>. An undersea <em>ridge</em> is an elongated elevation of varying complexity and size, generally having steep sides. An undersea <em>plateau</em> is a large, relatively flat elevation that is higher than the surrounding relief with one or more relatively steep sides. Although submerged, these features can reach close to sea level. The following are examples of <em>undersea terrain features</em> found on the floor of the Indian Ocean (see Figure 2).</p> <p>Andaman-Nicobar Ridge<br>Chagos-Laccadive Ridge<br>Kerguelen Plateau<br>Madagascar Plateau<br>Mascarene Plateau<br>Mozambique Plateau<br>Ninetyeast Ridge</p>"
"text": "<p>The Abyssal Plain is commonly interrupted by a variety of undersea terrain features including <em>seamounts</em>, <em>guyots</em>, <em>ridges</em>, and <em>plateaus</em>.<br><br><em>Seamounts</em> (see Figure 1) are submarine mountains at least 1,000 m (3,300 ft) high formed from individual volcanoes on the ocean floor. They are distinct from the plate-boundary volcanic system of the mid-ocean ridges, because seamounts tend to be circular or conical. A circular collapse caldera is often centered at the summit, evidence of a magma chamber within the volcano. \"Hot spots\" in the deep mantle often feed long chains of seamounts. These hot spots are associated with stationary plumes of molten rock rising from deep within the Earth's mantle. The hot-spot plumes melt through the overlying tectonic plate as it moves and supplies magma to the active volcanic island at the end of the chain of volcanic islands and seamounts. <br><br>Flat-topped seamounts are known as <em>guyots</em>. <br><br>An undersea <em>ridge</em> is an elongated elevation of varying complexity and size, generally having steep sides. <br><br>An undersea <em>plateau</em> is a large, relatively flat elevation that is higher than the surrounding relief with one or more relatively steep sides. Although submerged, these features can reach close to sea level. <br><br>The following are examples of undersea terrain features found on the floor of the Indian Ocean (see Figure 2):</p> <p>Andaman-Nicobar Ridge<br>Chagos-Laccadive Ridge<br>Kerguelen Plateau<br>Madagascar Plateau<br>Mascarene Plateau<br>Mozambique Plateau<br>Ninetyeast Ridge</p>"
},
"ocean trenches": {
"text": "<p><em>Ocean trenches</em> (see Figure 1) are the deepest parts of the ocean floor and are created by the process of subduction. Trenches form along convergent boundaries where tectonic plates are moving toward each other, and one plate sinks (is subducted) under another. The location where the sinking of a plate occurs is called a subduction zone. Subduction can occur when oceanic crust collides with and sinks under (subducts) continental crust resulting in volcanic, seismic, and mountain-building processes. Subduction can also occur in the convergence of two oceanic plates where one will sink under the other and in the process create a deep ocean trench. Subduction processes in oceanic-oceanic plate convergence also result in the formation of volcanoes. Over millions of years, the erupted lava and volcanic debris pile up on the ocean floor until a submarine volcano rises above sea level to form a volcanic island. Such volcanoes are typically strung out in chains called island arcs. As the name implies, volcanic island arcs, which closely parallel the trenches, are generally curved. The following are examples of <em>ocean trenches</em> found on the floor of the Indian Ocean (see Figure 2).</p> <p>Java/Sunda Trench; note - deepest point in the Indian Ocean</p>"
"text": "<p><em>Ocean trenches</em> (see Figure 1) are the deepest parts of the ocean floor and are created by the process of subduction. Trenches form along convergent boundaries where tectonic plates are moving toward each other, and one plate sinks (is subducted) under another. The location where the sinking of a plate occurs is called a subduction zone. Subduction can occur when oceanic crust collides with and sinks under (subducts) continental crust, resulting in volcanic, seismic, and mountain-building processes. Subduction can also occur in the convergence of two oceanic plates, where one will sink under the other and in the process create a deep ocean trench. <br><br>Subduction processes in oceanic-to-oceanic plate convergence also result in the formation of volcanoes. Over millions of years, the erupted lava and volcanic debris pile up on the ocean floor until a submarine volcano rises above sea level to form a <em>volcanic island</em>. Such volcanoes are typically strung out in curved chains called island arcs. <br><br>The following are examples of ocean trenches found on the floor of the Indian Ocean (see Figure 2):</p> <p>Java/Sunda Trench; note - deepest point in the Indian Ocean</p>"
},
"atolls": {
"text": "<p><em>Atolls</em> (see Figure 1) are the remains of dormant volcanic islands. In warm tropical oceans, coral colonies establish themselves on the margins of the island. Then, over time, the high elevation of the island collapses and erodes away to sea level leaving behind an outline of the island in the form of the fringing coral reef. The resulting low island is typified by the coral reef surrounding a low elevation of sand and coral above sea level with an interior shallow lagoon. Often times the remaining dry land is broken into a ring of islets. Some lagoons can be hundreds of square kilometers. It may take as long as 300,000 years for an atoll formation to occur. <em>Guyots</em> are submerged atoll structures, which explains why they are flat topped seamounts. The following are examples of <em>atolls</em> found in the Indian Ocean (see Figure 2).</p> <p>Bassas da India<br>Chagos Archipelago/Diego Garcia<br>Europa Island<br>Juan de Nova Island<br>Lakshadweep Islands<br>Maldive Islands<br>Seychelles</p>"
"text": "<p><em>Atolls</em> (see Figure 1) are the remains of dormant volcanic islands. In warm tropical oceans, coral colonies establish themselves on the margins of the island. Then, over time, the high elevation of the island collapses and erodes away to sea level leaving behind an outline of the island in the form of the fringing coral reef. The resulting low island is typified by the coral reef that surrounds a low elevation of sand and coral above sea level, with an interior shallow lagoon. Often the remaining dry land is broken into a ring of islets, and some lagoons can be hundreds of square kilometers.<br><br><em>Guyots</em> are submerged atoll structures, which explains why they are flat-topped seamounts. <br><br>The following are examples of atolls found in the Indian Ocean (see Figure 2):</p> <p>Bassas da India<br>Chagos Archipelago/Diego Garcia<br>Europa Island<br>Juan de Nova Island<br>Lakshadweep Islands<br>Maldive Islands<br>Seychelles</p>"
}
},
"Elevation": {
@ -74,7 +74,7 @@
"text": "-3,741 m"
},
"ocean zones": {
"text": "Composed of water and in a fluid state, the oceans are delimited differently than the solid continents. Oceans are divided into three zones based on depth and light level. Although some sea creatures depend on light to live, others can do without it. Sunlight entering the water may travel about 1,000 m into the oceans under the right conditions, but there is rarely any significant light beyond 200 m.<br><br>The upper 200 m (656 ft) of oceans is called the euphotic, or \"sunlight,\" zone. This zone contains the vast majority of commercial fisheries and is home to many protected marine mammals and sea turtles. Only a small amount of light penetrates beyond this depth. <br><br>The zone between 200 m (656 ft) and 1,000 m (3,280 ft) is usually referred to as the \"twilight\" zone, but is officially the dysphotic zone. In this zone, the intensity of light rapidly dissipates as depth increases. Such a minuscule amount of light penetrates beyond a depth of 200 m that photosynthesis is no longer possible.<br><br>The aphotic, or \"midnight,\" zone exists in depths below 1,000 m (3,280 ft). Sunlight does not penetrate to these depths and the zone is bathed in darkness."
"text": "Composed of water and in a fluid state, the oceans are delimited differently than the solid continents. They are divided into three zones based on depth and light level. Sunlight entering the water may travel about 1,000 m into the oceans under the right conditions, but there is rarely any significant light beyond 200 m.<br><br>The upper 200 m (656 ft) of oceans is called the euphotic, or \"sunlight,\" zone. This zone contains the vast majority of commercial fisheries and is home to many protected marine mammals and sea turtles. Only a small amount of light penetrates beyond this depth. <br><br>The zone between 200 m (656 ft) and 1,000 m (3,280 ft) is usually referred to as the \"twilight\" zone, but is officially the dysphotic zone. In this zone, the intensity of light rapidly dissipates as depth increases. Such a minuscule amount of light penetrates beyond a depth of 200 m that photosynthesis is no longer possible.<br><br>The aphotic, or \"midnight,\" zone exists in depths below 1,000 m (3,280 ft). Sunlight does not penetrate to these depths, and the zone is bathed in darkness."
}
},
"Natural resources": {
@ -97,7 +97,7 @@
"text": "northeast monsoon (December to April), southwest monsoon (June to October); tropical cyclones occur during May/June and October/November in the northern Indian Ocean and January/February in the southern Indian Ocean"
},
"Marine fisheries": {
"text": "<p>the Indian Ocean fisheries are the third most important in the world accounting for 15.5%, or 12,220,000 mt of the global catch in 2020; tuna, small pelagic fish, and shrimp are important species in these regions; the Food and Agriculture Organization delineated two fishing regions in the Indian Ocean:</p> <p><em>Eastern Indian Ocean</em> region (Region 57) is the most important region and the fifth largest producing region in the world with 8.4%, or 6,590,000 mt, of the global catch in 2020; the region encompasses the waters north of 55º South latitude and east of 80º East longitude including the Bay of Bengal and Andaman Sea with the major producers including India (2,362,481 mt), Indonesia (1,940,558 mt), Burma (1,114,777 mt), Bangladesh (877,837 mt), and Sri Lanka (373,369 mt); the principal catches include shad, Skipjack tuna, mackerel, shrimp, and sardinellas</p> <em>Western Indian Ocean</em> region (Region 51) is the worlds sixth largest producing region with more than 7.1% or 5,630,000 mt of the global catch in 2020; this region encompasses the waters north of 40º South latitude and west of 80º East longitude including the western Indian Ocean, Arabian Sea, Persian Gulf, and Red Sea as well as the waters along the east coast of Africa and Madagascar, the south coast of the Arabian Peninsula, and the west coast of India with major producers including India (2,207,125 mt), Oman (580,048 mt), Pakistan (341,730 mt), and Mozambique (274,791 mt); the principal catches include Skipjack and Yellowfin tuna, mackerel, sardines, shrimp, and cephalopods<br><br><strong>Regional fisheries bodies:</strong> Indian Ocean Tuna Commission, Commission for the Conservation of Southern Bluefin Tuna, Regional Commission for Fisheries (Persian Gulf/Gulf of Oman), Southeast Asia Fisheries Development Center, Southwest Indian Ocean Fisheries Commission, South Indian Ocean Fisheries Agreement"
"text": "<p>the Indian Ocean fisheries are the third most important in the world, accounting for 15.5%, or 12,220,000 mt of the global catch in 2020; tuna, small pelagic fish, and shrimp are important species in these regions; the Food and Agriculture Organization delineated two fishing regions in the Indian Ocean:</p> <p><em>Eastern Indian Ocean</em> region (Region 57) is the most important and the fifth-largest-producing region in the world with 8.4%, or 6,590,000 mt, of the global catch in 2020; the region encompasses the waters north of 55º South latitude and east of 80º East longitude, including the Bay of Bengal and Andaman Sea, with the major producers including India (2,362,481 mt), Indonesia (1,940,558 mt), Burma (1,114,777 mt), Bangladesh (877,837 mt), and Sri Lanka (373,369 mt); the principal catches include shad, skipjack tuna, mackerel, shrimp, and sardinellas</p> <em>Western Indian Ocean</em> region (Region 51) is the worlds sixth-largest-producing region with more than 7.1% or 5,630,000 mt of the global catch in 2020; this region encompasses the waters north of 40º South latitude and west of 80º East longitude, including the western Indian Ocean, Arabian Sea, Persian Gulf, and Red Sea, as well as the waters along the east coast of Africa and Madagascar, the south coast of the Arabian Peninsula, and the west coast of India; major producers include India (2,207,125 mt), Oman (580,048 mt), Pakistan (341,730 mt), and Mozambique (274,791 mt); the principal catches include skipjack and yellowfin tuna, mackerel, sardines, shrimp, and cephalopods<br><br><strong>Regional fisheries bodies:</strong> Indian Ocean Tuna Commission, Commission for the Conservation of Southern Bluefin Tuna, Regional Commission for Fisheries (Persian Gulf/Gulf of Oman), Southeast Asia Fisheries Development Center, Southwest Indian Ocean Fisheries Commission, South Indian Ocean Fisheries Agreement"
}
},
"Government": {

View file

@ -42,25 +42,25 @@
},
"Bathymetry": {
"continental shelf": {
"text": "The <em>continental shelf </em>(see Figure 1), a rather flat area of the sea floor adjacent to the coast that gradually slopes down from the shore to water depths that are typically less than 200 m (660 ft). Dimensions can vary: they may be narrow or nearly nonexistent in some places or extend for hundreds of miles in others. The waters above the continental shelf are usually productive in both plant and animal life, both from sunlight and nutrients from ocean upwelling and terrestrial runoff. More than one quarter of the Arctic sea floor is <em>continental shelf</em>. The Eurasian shelf is very wide extending out 1,500 km (930 mi) and is the largest <em>continental shelf</em> in the World. The following are examples of features found on the <em>continental shelf</em> of the Arctic Ocean (see Figure 2).<br><br>Barents Shelf<br>Beaufort Shelf<br>Davis Sill<br>Chukchi Shelf<br>East Siberian Shelf<br>Kara Shelf<br>Laptev Shelf<br>Lincoln Shelf"
"text": "The <em>continental shelf </em>(see Figure 1), a rather flat area of the sea floor adjacent to the coast that gradually slopes down from the shore to water depths that are typically less than 200 m (660 ft). Dimensions can vary: they may be narrow or nearly nonexistent in some places or extend for hundreds of miles in others. The waters above the continental shelf are usually productive in both plant and animal life, both from sunlight and nutrients from ocean upwelling and terrestrial runoff. More than one quarter of the Arctic sea floor is <em>continental shelf</em>. The Eurasian shelf is very wide, extending out 1,500 km (930 mi), and is the largest <em>continental shelf</em> in the world. The following are examples of features found on the <em>continental shelf</em> of the Arctic Ocean (see Figure 2).<br><br>Barents Shelf<br>Beaufort Shelf<br>Davis Sill<br>Chukchi Shelf<br>East Siberian Shelf<br>Kara Shelf<br>Laptev Shelf<br>Lincoln Shelf"
},
"continental slope": {
"text": "The <em>continental slope</em> (see Figure 1) is where the ocean bottom drops off more rapidly until it meets the deep-sea floor (abyssal plain) at depths exceeding 3,000 m (9,850 ft) water depth. The deep waters of the continental slope are characterized by cold temperatures, low light conditions, and very high pressures. Sunlight does not penetrate to these depths, having been absorbed or reflected in the water above. The <em>continental slope</em> can be indented by submarine canyons, often associated with the outflow of major rivers. Another feature of the continental slope are alluvial fans or cones of sediments carried downstream to the ocean by major rivers and deposited down the slope. The following are examples of features found on the <em>continental slope</em> of the Arctic Ocean (see Figure 2).<br><br>Litke Trough<br>Novaya Zemlya Trough<br>Svyataya Anna Trough (Saint Anna Trough)<br>Voronin Trough"
"text": "The <em>continental slope</em> (see Figure 1) is where the ocean bottom drops off more rapidly until it meets the deep-sea floor (abyssal plain) at depths exceeding 3,000 m (9,850 ft). The deep waters of the continental slope are characterized by cold temperatures, low light conditions, and very high pressures. Sunlight does not penetrate to these depths, having been absorbed or reflected in the water above. The continental slope can be indented by submarine canyons, often associated with the outflow of major rivers. Another feature of the continental slope is alluvial fans, or cones of sediments, that major rivers carry downstream to the ocean and deposit down the slope. The following are examples of features found on the <em>continental slope</em> of the Arctic Ocean (see Figure 2):<br><br>Litke Trough<br>Novaya Zemlya Trough<br>Svyataya Anna Trough (Saint Anna Trough)<br>Voronin Trough"
},
"abyssal plains": {
"text": "The <em>abyssal plains </em>(see Figure 1), at depths of over 3,000 m (10,000 ft) and covering 70% of the ocean floor, are the largest habitat on earth. Sunlight does not penetrate to the sea floor, making these deep, dark ecosystems less productive than those along the continental shelf. Despite their name, these “plains” are not uniformly flat; they are interrupted by features like hills, valleys, and seamounts. The following are examples of features found on the <em>abyssal plains</em> of the Arctic Ocean (see Figure 2).<br><br>Baffin Basin<br>Canada Basin<br>Fram/Amundsen Basin<br>Greenland Abyssal Plain<br>Iceland Basin<br>Makarov Basin<br>Molloy Deep; note - deepest point in the Arctic Ocean<br>Nansen Basin<br>Norwegian Basin"
"text": "The <em>abyssal plains </em>(see Figure 1), at depths of over 3,000 m (10,000 ft) and covering 70% of the ocean floor, are the largest habitat on earth. Sunlight does not penetrate to the sea floor, making these deep, dark ecosystems less productive than those along the continental shelf. Despite their name, these “plains” are not uniformly flat; they are interrupted by features like hills, valleys, and seamounts. The following are examples of features found on the <em>abyssal plains</em> of the Arctic Ocean (see Figure 2):<br><br>Baffin Basin<br>Canada Basin<br>Fram/Amundsen Basin<br>Greenland Abyssal Plain<br>Iceland Basin<br>Makarov Basin<br>Molloy Deep; note - deepest point in the Arctic Ocean<br>Nansen Basin<br>Norwegian Basin"
},
"mid-ocean ridge": {
"text": "The <em>mid-ocean ridge </em>(see Figure 1), rising up from the abyssal plain, is an underwater mountain range, over 64,000 km (40,000 mi) long, rising to an average depth of 2,400 m (8,000 ft). <em>Mid-ocean ridges</em> form at divergent plate boundaries where two tectonic plates are moving apart and new crust is created by magma pushing up from the mantle. Tracing their way around the global ocean, this system of underwater volcanoes forms the longest mountain range on Earth. Fracture Zones are linear transform faults that develop perpendicular to the line of the mid-ocean ridge which can offset the ridge line and divide it into segments. The following are examples of <em>mid-ocean ridges</em> found in the Arctic Ocean (see Figure 2).<br><br>Gakkel Ridge<br>Mohns Ridge"
"text": "The <em>mid-ocean ridge </em>(see Figure 1) that rises from the abyssal plain is an underwater mountain range over 64,000 km (40,000 mi) long, reaching an average depth of 2,400 m (8,000 ft). Mid-ocean ridges form at divergent plate boundaries where two tectonic plates are moving apart and magma pushing up from the mantle creates new crust. Tracing their way around the global ocean, this system of underwater volcanoes forms the longest mountain range on Earth. Fracture zones are linear transform faults that develop perpendicular to the line of the mid-ocean ridge, which can offset the ridge line and divide it into segments. The following are examples of <em>mid-ocean ridges</em> found in the Arctic Ocean (see Figure 2):<br><br>Gakkel Ridge<br>Mohns Ridge"
},
"undersea terrain features": {
"text": "<p>The Abyssal Plain is commonly interrupted by a variety of commonly named undersea terrain features including <em>seamounts</em>, <em>guyots</em>, <em>ridges</em>, and <em>plateaus</em>. <em>Seamounts</em> (see Figure 1) are submarine mountains at least 1,000 m (3,300 ft) high formed from individual volcanoes on the ocean floor. They are distinct from the plate-boundary volcanic system of the mid-ocean ridges, because <em>seamounts</em> tend to be circular or conical. A circular collapse caldera is often centered at the summit, evidence of a magma chamber within the volcano. Flat topped <em>seamounts</em> are known as <em>guyots</em>. Long chains of <em>seamounts</em> are often fed by \"hot spots\" in the deep mantle. These hot spots are associated with stationary plumes of molten rock rising from deep within the Earth's mantle. These hot spot plumes melt through the overlying tectonic plate as it moves and supplies magma to the active volcanic island at the end of the chain of volcanic islands and <em>seamounts</em>. An undersea <em>ridge</em> is an elongated elevation of varying complexity and size, generally having steep sides. An undersea <em>plateau</em> is a large, relatively flat elevation that is higher than the surrounding relief with one or more relatively steep sides. Although submerged, these features can reach close to sea level. The following are examples of <em>undersea terrain features</em> found on the floor of the Arctic Ocean (see Figure 2).</p> <p>Lomonosov Ridge<br>Gakkel Ridge<br>Alpha Ridge<br>Mendeleev Rise<br>Chukchi Plateau</p>"
"text": "<p>The Abyssal Plain is commonly interrupted by a variety of undersea terrain features including <em>seamounts</em>, <em>guyots</em>, <em>ridges</em>, and <em>plateaus</em>. <br><br><em>Seamounts</em> (see Figure 1) are submarine mountains at least 1,000 m (3,300 ft) high that are formed from individual volcanoes on the ocean floor. They are distinct from the plate-boundary volcanic system of the mid-ocean ridges because <em>seamounts</em> tend to be circular or conical. A circular-collapse caldera is often centered at the summit, evidence of a magma chamber within the volcano. \"Hot spots\" in the deep mantle often feed long chains of seamounts. These hot spots are associated with stationary plumes of molten rock rising from deep within the Earth's mantle. The hot-spot plumes melt through the overlying tectonic plate as it moves and supplies magma to the active volcanic island at the end of the chain of volcanic islands and seamounts.<br><br>Flat-topped seamounts are known as <em>guyots</em>. <br><br>An undersea <em>ridge</em> is an elongated elevation of varying complexity and size, generally having steep sides. <br><br>An undersea <em>plateau</em> is a large, relatively flat elevation that is higher than the surrounding relief, with one or more relatively steep sides. Although submerged, these features can reach close to sea level. <br><br>The following are examples of undersea terrain features found on the floor of the Arctic Ocean (see Figure 2):<br><br>Lomonosov Ridge<br>Gakkel Ridge<br>Alpha Ridge<br>Mendeleev Rise<br>Chukchi Plateau</p>"
},
"ocean trenches": {
"text": "note - there are no oceanic trenches on the Arctic sea floor"
"text": "there are no oceanic trenches on the Arctic sea floor"
},
"atolls": {
"text": "note - there are no atolls found in the Arctic Ocean"
"text": "there are no atolls found in the Arctic Ocean"
}
},
"Elevation": {
@ -74,7 +74,7 @@
"text": "-1,205 m"
},
"ocean zones": {
"text": "Composed of water and in a fluid state, the ocean is delimited differently than the solid continents. The Ocean is divided into three zones based on depth and light level. Although some sea creatures depend on light to live, others can do without it. Sunlight entering the water may travel about 1,000 m into the oceans under the right conditions, but there is rarely any significant light beyond 200 m.<br><br>The upper 200 m (656 ft) of the ocean is called the euphotic, or \"sunlight,\" zone. This zone contains the vast majority of commercial fisheries and is home to many protected marine mammals and sea turtles. Only a small amount of light penetrates beyond this depth. <br><br>The zone between 200 m (656 ft) and 1,000 m (3,280 ft) is usually referred to as the \"twilight\" zone, but is officially the dysphotic zone. In this zone, the intensity of light rapidly dissipates as depth increases. Such a minuscule amount of light penetrates beyond a depth of 200 m that photosynthesis is no longer possible.<br><br>The aphotic, or \"midnight,\" zone exists in depths below 1,000 m (3,280 ft). Sunlight does not penetrate to these depths and the zone is bathed in darkness."
"text": "Composed of water and in a fluid state, the ocean is delimited differently than the solid continents. It is divided into three zones based on depth and light level. Sunlight entering the water may travel about 1,000 m into the oceans under the right conditions, but there is rarely any significant light beyond 200 m.<br><br>The upper 200 m (656 ft) of the ocean is called the euphotic, or \"sunlight,\" zone. This zone contains the vast majority of commercial fisheries and is home to many protected marine mammals and sea turtles. Only a small amount of light penetrates beyond this depth. <br><br>The zone between 200 m (656 ft) and 1,000 m (3,280 ft) is usually referred to as the \"twilight\" zone, but is officially the dysphotic zone. In this zone, the intensity of light rapidly dissipates as depth increases. Such a minuscule amount of light penetrates beyond a depth of 200 m that photosynthesis is no longer possible.<br><br>The aphotic, or \"midnight,\" zone exists in depths below 1,000 m (3,280 ft). Sunlight does not penetrate to these depths, and the zone is bathed in darkness."
}
},
"Natural resources": {
@ -97,13 +97,13 @@
"text": "polar climate characterized by persistent cold and relatively narrow annual temperature range; winters characterized by continuous darkness, cold and stable weather conditions, and clear skies; summers characterized by continuous daylight, damp and foggy weather, and weak cyclones with rain or snow"
},
"Marine fisheries": {
"text": "the Arctic fishery region (Region 18) is the smallest in the world with a catch of only 708 mt in 2019, although the Food and Agriculture Organization assesses that some Arctic catches are reported in adjacent regions; Russia and Canada were historically the major producers; in 2017, Canada, Denmark (Greenland), Iceland, Norway, Russia, and the US, along with the Peoples Republic of China, the European Union, Japan, and the Republic of Korea, agreed to a 16 year ban on fishing in the Central Arctic Ocean to allow for time to study the ecological system of these waters<br><br><strong>Regional fisheries bodies:</strong> International Council for the Exploration of the Seas; Agreement to Prevent Unregulated High Seas Fisheries in the Central Arctic Ocean"
"text": "the Arctic fishery region (Region 18) is the smallest in the world with a catch of only 708 mt in 2019, although the Food and Agriculture Organization assesses that some Arctic catches are reported in adjacent regions; Russia and Canada were historically the major producers; in 2017, Canada, Denmark (Greenland), Iceland, Norway, Russia, and the US, along with the Peoples Republic of China, the European Union, Japan, and the Republic of Korea, agreed to a 16-year ban on fishing in the Central Arctic Ocean to allow for time to study the ecological system of these waters<br><br><strong>Regional fisheries bodies:</strong> International Council for the Exploration of the Seas; Agreement to Prevent Unregulated High Seas Fisheries in the Central Arctic Ocean"
}
},
"Government": {
"Country name": {
"etymology": {
"text": "the name Arctic comes from the Greek word \"arktikos\" meaning \"near the bear\" or \"northern,\" and that word derives from \"arktos,\" meaning \"bear\"; the name refers either to the constellation Ursa Major, the \"Great Bear,\" which is prominent in the northern celestial sphere, or to the constellation Ursa Minor, the \"Little Bear,\" which contains Polaris, the North (Pole) Star"
"text": "the name Arctic comes from the Greek word <em>arktikos </em>meaning \"near the bear\" or \"northern,\" and that word derives from <em>arktos</em>, meaning \"bear\"; the name refers either to the constellation Ursa Major, the \"Great Bear,\" which is prominent in the northern celestial sphere, or to the constellation Ursa Minor, the \"Little Bear,\" which contains Polaris, the North (Pole) Star"
}
}
},

View file

@ -12,7 +12,7 @@
"text": "0 00 N, 25 00 W"
},
"Map references": {
"text": "Political Map of the World"
"text": "Map of the world oceans"
},
"Area": {
"total ": {
@ -42,25 +42,25 @@
},
"Bathymetry": {
"continental shelf": {
"text": "The <em>continental shelf</em> (see Figure 1), a rather flat area of the sea floor adjacent to the coast that gradually slopes down from the shore to water depths of about 200 m (660 ft). Dimensions can vary: they may be narrow or nearly nonexistent in some places or extend for hundreds of miles in others. The waters along the <em>continental shelf</em> are usually productive in both plant and animal life, both from sunlight and nutrients from ocean upwelling and terrestrial runoff. The passive margins of the Atlantic Ocean provide for wide continental shelves in North America, Northwest Europe, and the southern coast of South America. The following are examples of features found on the <em>continental shelf</em> of the Atlantic Ocean.<br> <p>Blake Plateau (Figure 5)<br>Celtic Shelf (Figure 2)<br>Dogger Bank (Figure 2) <br>Flemish Cap (Figure 2) <br>Falkland Plateau (Figure 3) <br>Grand Banks of Newfoundland (Figure 2) <br>Great Bahama Bank (Figure 5)<br>Little Bahama Bank (Figure 5)<br>Tunisian Plateau (Figure 4)<br>Yucatán Shelf (Figure 5)</p>"
"text": "The <em>continental shelf</em> (see Figure 1), a rather flat area of the sea floor adjacent to the coast that gradually slopes down from the shore to water depths of about 200 m (660 ft). Dimensions can vary: they may be narrow or nearly nonexistent in some places or extend for hundreds of miles in others. The waters along the continental shelf are usually productive in both plant and animal life, both from sunlight and nutrients from ocean upwelling and terrestrial runoff. The passive margins of the Atlantic Ocean provide for wide continental shelves in North America, Northwest Europe, and the southern coast of South America. The following are examples of features found on the continental shelf of the Atlantic Ocean:<br> <p>Blake Plateau (Figure 5)<br>Celtic Shelf (Figure 2)<br>Dogger Bank (Figure 2) <br>Flemish Cap (Figure 2) <br>Falkland Plateau (Figure 3) <br>Grand Banks of Newfoundland (Figure 2) <br>Great Bahama Bank (Figure 5)<br>Little Bahama Bank (Figure 5)<br>Tunisian Plateau (Figure 4)<br>Yucatán Shelf (Figure 5)</p>"
},
"continental slope": {
"text": "The c<em>ontinental slope</em> (see Figure 1) is where the ocean bottom drops off more rapidly until it meets the deep-sea floor (<em>abyssal plain</em>) at about 3,200 m (10,500 ft) water depth. The deep waters of the <em>continental slope</em> are characterized by cold temperatures, low light conditions, and very high pressures. Sunlight does not penetrate to these depths, having been absorbed or reflected in the water above. The <em>continental slope</em> can be indented by submarine canyons, often associated with the outflow of major rivers. Another feature of the <em>continental slope</em> are alluvial fans or cones of sediments carried downstream to the ocean by major rivers and deposited down the slope. The following are examples of features found on the <em>continental slope</em> of the Atlantic Ocean.<br> <p>Amazon Cone (Figure 3)<br>Congo Fan (Figure 3)<br>Hudson Canyon (Figure 5)<br>Mississippi Fan (Figure 5)</p>"
"text": "The c<em>ontinental slope</em> (see Figure 1) is where the ocean bottom drops off more rapidly until it meets the deep-sea floor (<em>abyssal plain</em>) at about 3,200 m (10,500 ft) water depth. The deep waters of the continental slope are characterized by cold temperatures, low light conditions, and very high pressures. Sunlight does not penetrate to these depths, having been absorbed or reflected in the water above. The continental slope can be indented by submarine canyons, which are often associated with the outflow of major rivers. Another feature of the continental slope is alluvial fans, or cones of sediments, that major rivers carry downstream to the ocean and deposit down the slope. The following are examples of features found on the continental slope of the Atlantic Ocean:<br> <p>Amazon Cone (Figure 3)<br>Congo Fan (Figure 3)<br>Hudson Canyon (Figure 5)<br>Mississippi Fan (Figure 5)</p>"
},
"abyssal plains": {
"text": "The a<em>byssal plains</em> (see Figure 1), at depths of over 3,000 m (10,000 ft) and covering 70% of the ocean floor, are the largest habitat on earth. Sunlight does not penetrate to the sea floor, making these deep, dark ecosystems less productive than those along the continental shelf. Despite their name, these “plains” are not uniformly flat; they are interrupted by features like hills, valleys, and seamounts. The following are examples of features found on the <em>abyssal plains</em> of the Atlantic Ocean.<br> <p>Angola Basin (Figure 3)<br>Agulhas Basin (Figure 3) <br>Argentine Basin (Figure 3) <br>Brazil Basin (Figure 3)<br>Canary Basin (Figure 2) <br>Cape Basin (Figure 3)<br>Colombia Basin (Figure 2) <br>Labrador Basin (Figure 2) <br>Mexico Basin (Figure 2)<br>Newfoundland Basin (Figure 2) <br>North American Basin (Figure 2) <br>Venezuela Basin (Figure 2)<br>West European Basin (Figure 2)</p>"
"text": "The a<em>byssal plains</em> (see Figure 1), at depths of over 3,000 m (10,000 ft) and covering 70% of the ocean floor, are the largest habitat on earth. Sunlight does not penetrate to the sea floor, making these deep, dark ecosystems less productive than those along the continental shelf. Despite their name, these “plains” are not uniformly flat; they are interrupted by features like hills, valleys, and seamounts. The following are examples of features found on the abyssal plains of the Atlantic Ocean:<br> <p>Angola Basin (Figure 3)<br>Agulhas Basin (Figure 3) <br>Argentine Basin (Figure 3) <br>Brazil Basin (Figure 3)<br>Canary Basin (Figure 2) <br>Cape Basin (Figure 3)<br>Colombia Basin (Figure 2) <br>Labrador Basin (Figure 2) <br>Mexico Basin (Figure 2)<br>Newfoundland Basin (Figure 2) <br>North American Basin (Figure 2) <br>Venezuela Basin (Figure 2)<br>West European Basin (Figure 2)</p>"
},
"mid-ocean ridge": {
"text": "The <em>mid-ocean ridge </em>(see Figure 1), rising up from the <em>abyssal plain</em>, is an underwater mountain range, over 64,000 km (40,000 mi) long, rising to an average depth of 2,400 m (8,000 ft). <em>Mid-ocean ridges</em> form at divergent plate boundaries where two tectonic plates are moving apart and new crust is created by magma pushing up from the mantle. Tracing their way around the global ocean, this system of underwater volcanoes forms the longest mountain range on Earth. Fracture Zones are linear transform faults that develop perpendicular to the line of the mid-ocean ridge which can offset the ridge line and divide it into segments. The Charlie-Gibbs Fracture Zone displaces the mid-ocean ridge 350 km to the west separating the Mid-Atlantic Ridge from the Reykjanes Ridge. The Romanche Fracture Zone, located near the Equator, offsets the Mid-Atlantic Ridge 900 km and is considered the dividing line between the North and South Atlantic Oceans. The following are examples of <em>mid-ocean ridges</em> found on the floor of the Atlantic Ocean.<br> <p>East Mediterranean Ridge (Figure 4)<br>Mid-Atlantic Ridge (Figures 2, 3)<br>Reykjanes Ridge (Figure 2)</p>"
"text": "The <em>mid-ocean ridge </em>(see Figure 1), rising from the <em>abyssal plain</em>, is an underwater mountain range, over 64,000 km (40,000 mi) long, reaching an average depth of 2,400 m (8,000 ft). Mid-ocean ridges form at divergent plate boundaries where two tectonic plates are moving apart and magma pushing up from the mantle creates new crust. Tracing their way around the global ocean, this system of underwater volcanoes forms the longest mountain range on Earth. Fracture zones are linear transform faults that develop perpendicular to the line of the mid-ocean ridge, which can offset the ridge line and divide it into segments. The Charlie-Gibbs Fracture Zone displaces the mid-ocean ridge 350 km to the west, separating the Mid-Atlantic Ridge from the Reykjanes Ridge. The Romanche Fracture Zone, located near the Equator, offsets the Mid-Atlantic Ridge 900 km and is considered the dividing line between the North and South Atlantic Oceans. The following are examples of mid-ocean ridges found on the floor of the Atlantic Ocean:<br> <p>East Mediterranean Ridge (Figure 4)<br>Mid-Atlantic Ridge (Figures 2, 3)<br>Reykjanes Ridge (Figure 2)</p>"
},
"undersea terrain features": {
"text": "The Abyssal Plain is commonly interrupted by a variety of commonly named undersea terrain features including <em>seamounts</em>, <em>guyots</em>, <em>ridges</em>, and <em>plateaus</em>. <em>Seamounts</em> (see Figure 1) are submarine mountains at least 1,000 m (3,300 ft) high formed from individual volcanoes on the ocean floor. They are distinct from the plate-boundary volcanic system of the mid-ocean ridges, because <em>seamounts</em> tend to be circular or conical. A circular collapse caldera is often centered at the summit, evidence of a magma chamber within the volcano. Flat topped <em>seamounts</em> are known as <em>guyots</em>. Long chains of <em>seamounts</em> are often fed by \"hot spots\" in the deep mantle. These hot spots are associated with stationary plumes of molten rock rising from deep within the Earth's mantle. These hot spot plumes melt through the overlying tectonic plate as it moves and supplies magma to the active volcanic island at the end of the chain of volcanic islands and <em>seamounts</em>. An undersea <em>ridge</em> is an elongated elevation of varying complexity and size, generally having steep sides. An undersea <em>plateau</em> is a large, relatively flat elevation that is higher than the surrounding relief with one or more relatively steep sides. Although submerged, these features can reach close to sea level. The following are examples of <em>undersea terrain features</em> found on the floor of the Atlantic Ocean.<br> <p>Bermuda Rise (Figure 2)<br>Cape Verde Plateau (Figure 2)<br>New England Seamounts (Figure 2)<br>Rio Grande Plateau (Figure 3)<br>Rockall Plateau (Figure 2)</p>"
"text": "The Abyssal Plain is commonly interrupted by a variety of commonly named undersea terrain features including <em>seamounts</em>, <em>guyots</em>, <em>ridges</em>, and <em>plateaus</em>. <br><br><em>Seamounts</em> (see Figure 1) are submarine mountains at least 1,000 m (3,300 ft) high formed from individual volcanoes on the ocean floor. They are distinct from the plate-boundary volcanic system of the mid-ocean ridges, because seamounts tend to be circular or conical. A circular-collapse caldera is often centered at the summit, evidence of a magma chamber within the volcano. \"Hot spots\" in the deep mantle often feed long chains of seamounts. These hot spots are associated with stationary plumes of molten rock rising from deep within the Earth's mantle. The hot-spot plumes melt through the overlying tectonic plate as it moves and supplies magma to the active volcanic island at the end of the chain of volcanic islands and seamounts. <br><br>Flat topped seamounts are known as <em>guyots</em>. <br><br>An undersea <em>ridge</em> is an elongated elevation of varying complexity and size, generally having steep sides. <br><br>An undersea <em>plateau</em> is a large, relatively flat elevation that is higher than the surrounding relief with one or more relatively steep sides. Although submerged, these features can reach close to sea level. The following are examples of undersea terrain features found on the floor of the Atlantic Ocean:<br> <p>Bermuda Rise (Figure 2)<br>Cape Verde Plateau (Figure 2)<br>New England Seamounts (Figure 2)<br>Rio Grande Plateau (Figure 3)<br>Rockall Plateau (Figure 2)</p>"
},
"ocean trenches": {
"text": "<em>Ocean trenches</em> (see Figure 1) are the deepest parts of the ocean floor and are created by the process of subduction. <em>Trenches</em> form along convergent boundaries where tectonic plates are moving toward each other, and one plate sinks (is subducted) under another. The location where the sinking of a plate occurs is called a subduction zone. Subduction can occur when oceanic crust collides with and sinks under (subducts) continental crust resulting in volcanic, seismic, and mountain-building processes. Subduction can also occur in the convergence of two oceanic plates where one will sink under the other and in the process create a deep <em>ocean trench</em>. Subduction processes in oceanic-oceanic plate convergence also result in the formation of volcanoes. Over millions of years, the erupted lava and volcanic debris pile up on the ocean floor until a submarine volcano rises above sea level to form a <em>volcanic island</em>. Such volcanoes are typically strung out in chains called island arcs. As the name implies, volcanic island arcs, which closely parallel the <em>trenches</em>, are generally curved. The following are examples of <em>ocean trenches</em> found on the floor of the Atlantic Ocean.<br> <p>Cayman Trench (Caribbean Sea) (Figure 2)<br>Hellenic Trench (Mediterranean Sea) (Figure 4)<br>Puerto Rico Trench (Figure 2); note - deepest point in the Atlantic Ocean <br>South Sandwich Trench (South Atlantic) (Figure 3)</p>"
"text": "<em>Ocean trenches</em> (see Figure 1) are the deepest parts of the ocean floor and are created by the process of subduction. Trenches form along boundaries where tectonic plates are moving toward each other, and one plate sinks (is subducted) under another. The location where the sinking of a plate occurs is called a subduction zone. Subduction can occur when oceanic crust collides with and sinks under (subducts) continental crust, resulting in volcanic, seismic, and mountain-building processes. Subduction can also occur in the convergence of two oceanic plates, where one will sink under the other and in the process create a deep ocean trench. <br><br>Subduction processes in oceanic-to-oceanic plate convergence also result in the formation of volcanoes. Over millions of years, the erupted lava and volcanic debris pile up on the ocean floor until a submarine volcano rises above sea level to form a <em>volcanic island</em>. Such volcanoes are typically strung out in curved chains called island arcs. <br><br>The following are examples of ocean trenches found on the floor of the Atlantic Ocean:<br> <p>Cayman Trench (Caribbean Sea) (Figure 2)<br>Hellenic Trench (Mediterranean Sea) (Figure 4)<br>Puerto Rico Trench (Figure 2); note - deepest point in the Atlantic Ocean <br>South Sandwich Trench (South Atlantic) (Figure 3)</p>"
},
"atolls": {
"text": "<em>Atolls</em> are the remains of dormant volcanic islands. In warm tropical oceans, coral colonies establish themselves on the margins of the island. Then, over time, the high elevation of the island collapses and erodes away to sea level leaving behind an outline of the island in the form of the fringing coral reef. The resulting low island is typified by the coral reef surrounding a low elevation of sand and coral above sea level with an interior shallow lagoon. Often times the remaining dry land is broken into a ring of islets. Some lagoons can be hundreds of square kilometers. It may take as long as 300,000 years for an <em>atoll</em> formation to occur. <em>Guyots </em>are submerged atoll structures, which explains why they are flat topped seamounts. The following are examples of <em>atolls</em> found in the Atlantic Ocean<br><br>Rocas Atoll (Brazil); note - the only atoll in the South Atlantic"
"text": "<em>Atolls</em> are the remains of dormant volcanic islands. In warm tropical oceans, coral colonies establish themselves on the margins of the island. Then, over time, the high elevation of the island collapses and erodes away to sea level, leaving behind an outline of the island in the form of the fringing coral reef. The resulting low island is typified by the coral reef that surrounds a low elevation of sand and coral, with an interior shallow lagoon. Often the remaining dry land is broken into a ring of islets, and some lagoons can be hundreds of square kilometers. <br><br><em>Guyots </em>are submerged atoll structures, which explains why they are flat-topped.<br><br>Rocas Atoll (Brazil) is the only atoll in the South Atlantic."
}
},
"Elevation": {
@ -74,7 +74,7 @@
"text": "-3,646 m"
},
"ocean zones": {
"text": "Composed of water and in a fluid state, the ocean is delimited differently than the solid continents. The Ocean is divided into three zones based on depth and light level. Although some sea creatures depend on light to live, others can do without it. Sunlight entering the water may travel about 1,000 m into the ocean under the right conditions, but there is rarely any significant light beyond 200 m.<br><br>The upper 200 m (656 ft) of the ocean is called the euphotic, or \"sunlight,\" zone. This zone contains the vast majority of commercial fisheries and is home to many protected marine mammals and sea turtles. Only a small amount of light penetrates beyond this depth. <br><br>The zone between 200 m (656 ft) and 1,000 m (3,280 ft) is usually referred to as the \"twilight\" zone, but is officially the dysphotic zone. In this zone, the intensity of light rapidly dissipates as depth increases. Such a minuscule amount of light penetrates beyond a depth of 200 m that photosynthesis is no longer possible.<br><br>The aphotic, or \"midnight,\" zone exists in depths below 1,000 m (3,280 ft). Sunlight does not penetrate to these depths and the zone is bathed in darkness."
"text": "Composed of water and in a fluid state, the ocean is delimited differently than the solid continents. It is divided into three zones based on depth and light level. Sunlight entering the water may travel about 1,000 m into the ocean under the right conditions, but there is rarely any significant light beyond 200 m.<br><br>The upper 200 m (656 ft) of the ocean is called the euphotic, or \"sunlight,\" zone. This zone contains the vast majority of commercial fisheries and is home to many protected marine mammals and sea turtles. Only a small amount of light penetrates beyond this depth. <br><br>The zone between 200 m (656 ft) and 1,000 m (3,280 ft) is usually referred to as the \"twilight\" zone, but is officially the dysphotic zone. In this zone, the intensity of light rapidly dissipates as depth increases. Such a minuscule amount of light penetrates beyond a depth of 200 m that photosynthesis is no longer possible.<br><br>The aphotic, or \"midnight,\" zone exists in depths below 1,000 m (3,280 ft). Sunlight does not penetrate to these depths, and the zone is bathed in darkness."
}
},
"Natural resources": {
@ -95,13 +95,13 @@
"text": "tropical cyclones (hurricanes) develop off the coast of Africa near Cabo Verde and move westward into the Caribbean Sea; hurricanes can occur from May to December but are most frequent from August to November"
},
"Marine fisheries": {
"text": "<p>the Atlantic Ocean fisheries are the second most important in the world accounting for 25.8%, or 20,300,000 mt, of the global catch in 2020; of the seven regions delineated by the Food and Agriculture Organization in the Atlantic basin, the most important include the following:</p> <p><em>Northeast Atlantic</em> region (Region 27) is the fourth most important in the world producing 10.5% of the global catch or 8,310,000 mt in 2020; the region encompasses the waters north of 36º North latitude and east of 40º West longitude with the major producers including Norway (3,528,240 mt), Russia (1,044,153 mt), Iceland (933,019 mt), UK (823,669 mt), and Denmark (641,927 mt); the region includes the historically important fishing grounds of the North Sea, the Baltic Sea, and the Atlantic waters between Greenland, Iceland, and the British Isles; the principal catches include Atlantic cod, haddock, saithe (pollock), Blue Whiting, herring, and mackerel; not all fish caught are for human consumption, half of fish catches in the North Sea are processed as fish oil or fish meal, which are used in animal fodder</p> <p><em>Eastern Central Atlantic </em>region (Region 34) is the second most important Atlantic fishery, and seventh largest in the world producing more than 6.3% of the global catch or 4,950,000 mt in 2020; the region encompasses the waters between 36º North and 6º South latitude and east of 40º West longitude off the west coast of Africa with the major producers including Morocco (1,419,872 mt), Mauritania (705,850 mt), Senegal (472,571 mt), Nigeria (451,768 mt), Ghana (303,001 mt), Cameroon (265,969 mt), and Sierra Leone (200,000 mt); the principal catches include pilchard, sardinellas, shad, and mackerel</p> <p><em>Northwest Atlantic</em> region (Region 21) is the fourth most important Atlantic fishery and eleventh in the world producing 1.9% of the global catch and 1,540,000 mt in 2020; it encompasses the waters north of 35º North latitude and west of 42º West longitude including the important fishing grounds over the continental shelf of North America such as the Grand Banks, the Georges Bank, and the Flemish Cap, as well as Baffin Bay with the major producers including the US (927,777 mt), Canada (615,651 mt), and Greenland (179,990 mt); the principal catches include sea scallops, prawns, lobster, herring, and menhaden</p> <p><em>Mediterranean and Black Sea</em> region (Region 37) is a minor fishing region representing 1.5% or 1,190,000 mt of the worlds total capture in 2020; the region encompasses all waters east of the Strait of Gibraltar with the major producers including Turkey (686,650 mt), Italy (281,212 mt), Tunisia (129,325 mt), Spain (119,759 mt), and Russia (72,279 mt); the principal catches include European anchovy, European pilchard, Gobies, and clams<br><br><strong>Regional fisheries bodies:</strong> Commission for the Conservation of Southern Bluefin Tuna, Fishery Committee for the Eastern Central Atlantic, Fisheries Committee for the West Central Gulf of Guinea, General Fisheries Commission for the Mediterranean, International Commission for the Conservation of Atlantic Tunas, International  Council for the Exploration of the Seas, Northwest Atlantic Fisheries Organization, North Atlantic Salmon Conservation Organization, North East Atlantic Fisheries Commission, Southeast Atlantic Fisheries Organization, Western Central Atlantic Fishery Commission</p>"
"text": "<p>the Atlantic Ocean fisheries are the second most important in the world accounting for 25.8%, or 20,300,000 mt, of the global catch in 2020; of the seven regions delineated by the Food and Agriculture Organization in the Atlantic basin, the most important include the following:</p> <p><em>Northeast Atlantic</em> region (Region 27) is the fourth most important in the world, producing 10.5% of the global catch or 8,310,000 mt in 2020; the region encompasses the waters north of 36º North latitude and east of 40º West longitude, with the major producers including Norway (3,528,240 mt), Russia (1,044,153 mt), Iceland (933,019 mt), UK (823,669 mt), and Denmark (641,927 mt); the region includes the historically important fishing grounds of the North Sea, the Baltic Sea, and the Atlantic waters around Greenland, Iceland, and the British Isles; the principal catches include Atlantic cod, haddock, saithe (pollock), blue whiting, herring, and mackerel</p> <p><em>Eastern Central Atlantic </em>region (Region 34) is the second most important Atlantic fishery, and seventh largest in the world, producing more than 6.3% of the global catch or 4,950,000 mt in 2020; the region encompasses the waters between 36º North and 6º South latitude and east of 40º West longitude off the west coast of Africa, with the major producers including Morocco (1,419,872 mt), Mauritania (705,850 mt), Senegal (472,571 mt), Nigeria (451,768 mt), Ghana (303,001 mt), Cameroon (265,969 mt), and Sierra Leone (200,000 mt); the principal catches include pilchard, sardinellas, shad, and mackerel</p> <p><em>Northwest Atlantic</em> region (Region 21) is the fourth most important Atlantic fishery and eleventh in the world producing 1.9% of the global catch and 1,540,000 mt in 2020; it encompasses the waters north of 35º North latitude and west of 42º West longitude, including major fishing grounds over North America's continental shelf (the Grand Banks, Georges Bank, Flemish Cap, and Baffin Bay); the major producers include the US (927,777 mt), Canada (615,651 mt), and Greenland (179,990 mt); the principal catches include sea scallops, prawns, lobster, herring, and menhaden</p> <p><em>Mediterranean and Black Sea</em> region (Region 37) is a minor fishing region representing 1.5% or 1,190,000 mt of the worlds total capture in 2020; the region encompasses all waters east of the Strait of Gibraltar, with the major producers including Turkey (686,650 mt), Italy (281,212 mt), Tunisia (129,325 mt), Spain (119,759 mt), and Russia (72,279 mt); the principal catches include European anchovy, European pilchard, gobies, and clams<br><br><strong>Regional fisheries bodies:</strong> Commission for the Conservation of Southern Bluefin Tuna, Fishery Committee for the Eastern Central Atlantic, Fisheries Committee for the West Central Gulf of Guinea, General Fisheries Commission for the Mediterranean, International Commission for the Conservation of Atlantic Tunas, International  Council for the Exploration of the Seas, Northwest Atlantic Fisheries Organization, North Atlantic Salmon Conservation Organization, North East Atlantic Fisheries Commission, Southeast Atlantic Fisheries Organization, Western Central Atlantic Fishery Commission</p>"
}
},
"Government": {
"Country name": {
"etymology": {
"text": "name derives from the Greek description of the waters beyond the Strait of Gibraltar, Atlantis thalassa, meaning \"Sea of Atlas\""
"text": "name derives from the Greek description of the waters beyond the Strait of Gibraltar, <em>Atlantis thalassa</em>, meaning \"Sea of Atlas\""
}
}
},

View file

@ -12,7 +12,7 @@
"text": "0 00 N, 160 00 W"
},
"Map references": {
"text": "Political Map of the World"
"text": "Map of the world oceans"
},
"Area": {
"total ": {
@ -42,25 +42,25 @@
},
"Bathymetry": {
"continental shelf": {
"text": "The <em>continental shelf</em> (see Figure 1), a rather flat area of the sea floor adjacent to the coast that gradually slopes down from the shore to water depths of about 200 m (660 ft). Dimensions can vary: they may be narrow or nearly nonexistent in some places or extend for hundreds of miles in others. The waters along the <em>continental shelf</em> are usually productive in both plant and animal life, both from sunlight and nutrients from ocean upwelling and terrestrial runoff. The following are examples of features found on the <em>continental shelf</em> of the Pacific Ocean.<br> <p>Arafura Shelf (Figure 5)<br>Sahul Shelf (Figure 5)<br>Sunda Shelf (Figure 5)<br>Taiwan Banks (Figure 5)</p>"
"text": "The <em>continental shelf</em> (see Figure 1), a rather flat area of the sea floor adjacent to the coast that gradually slopes down from the shore to water depths of about 200 m (660 ft). Dimensions can vary: they may be narrow or nearly nonexistent in some places or extend for hundreds of miles in others. The waters along the continental shelf are usually productive in both plant and animal life, from sunlight and nutrients from ocean upwelling and terrestrial runoff. The following are examples of features found on the continental shelf of the Pacific Ocean:<br> <p>Arafura Shelf (Figure 5)<br>Sahul Shelf (Figure 5)<br>Sunda Shelf (Figure 5)<br>Taiwan Banks (Figure 5)</p>"
},
"continental slope": {
"text": "The c<em>ontinental slope</em> (see Figure 1) is where the ocean bottom drops off more rapidly until it meets the deep-sea floor (<em>abyssal plain</em>) at about 3,200 m (10,500 ft) water depth. The deep waters of the <em>continental slope</em> are characterized by cold temperatures, low light conditions, and very high pressures. Sunlight does not penetrate to these depths, having been absorbed or reflected in the water above. The <em>continental slope</em> can be indented by submarine canyons, often associated with the outflow of major rivers. Another feature of the <em>continental slope</em> are alluvial fans or cones of sediments carried downstream to the ocean by major rivers and deposited down the slope. The following are examples of features found on the <em>continental slope</em> of the Pacific Ocean.<br> <p>Pribilof Canyon (Figure 2)<br>Zhemchug Canyon (Figure 2); note - deepest submarine canyon</p>"
"text": "The c<em>ontinental slope</em> (see Figure 1) is where the ocean bottom drops off more rapidly until it meets the deep-sea floor (<em>abyssal plain</em>) at about 3,200 m (10,500 ft) water depth. The deep waters of the continental slope are characterized by cold temperatures, low light conditions, and very high pressures. Sunlight does not penetrate to these depths, having been absorbed or reflected in the water above. The continental slope can be indented by submarine canyons, often associated with the outflow of major rivers. Another feature of the continental slope is alluvial fans, or cones of sediments, that major rivers carry downstream to the ocean and deposit down the slope. The following are examples of features found on the continental slope of the Pacific Ocean:<br> <p>Pribilof Canyon (Figure 2)<br>Zhemchug Canyon (Figure 2); note - deepest submarine canyon</p>"
},
"abyssal plains": {
"text": "The a<em>byssal plains</em> (see Figure 1), at depths of over 3,000 m (10,000 ft) and covering 70% of the ocean floor, are the largest habitat on earth. Sunlight does not penetrate to the sea floor, making these deep, dark ecosystems less productive than those along the continental shelf. Despite their name, these “plains” are not uniformly flat; they are interrupted by features like hills, valleys, and seamounts. The following are examples of features found on the <em>abyssal plains</em> of the Pacific Ocean.<br> <p>Aleutian Basin (Figure 2)<br>Central Pacific Basin (Figure 2)<br>Northeast Pacific Basin (Figure 2)<br>Northwest Pacific Basin (Figure 2)<br>Philippine Basin (Figure 4)<br>Southwest Pacific Basin (Figure 4)<br>Tasman Basin (Figure 4)</p>"
"text": "The a<em>byssal plains</em> (see Figure 1), at depths of over 3,000 m (10,000 ft) and covering 70% of the ocean floor, are the largest habitat on earth. Sunlight does not penetrate to the sea floor, making these deep, dark ecosystems less productive than those along the continental shelf. Despite their name, these “plains” are not uniformly flat; they are interrupted by features like hills, valleys, and seamounts. The following are examples of features found on the abyssal plains of the Pacific Ocean:<br> <p>Aleutian Basin (Figure 2)<br>Central Pacific Basin (Figure 2)<br>Northeast Pacific Basin (Figure 2)<br>Northwest Pacific Basin (Figure 2)<br>Philippine Basin (Figure 4)<br>Southwest Pacific Basin (Figure 4)<br>Tasman Basin (Figure 4)</p>"
},
"mid-ocean ridge": {
"text": "The <em>mid-ocean ridge </em>(see Figure 1), rising up from the <em>abyssal plain</em>, is an underwater mountain range, over 64,000 km (40,000 mi) long, rising to an average depth of 2,400 m (8,000 ft). <em>Mid-ocean ridges</em> form at divergent plate boundaries where two tectonic plates are moving apart and new crust is created by magma pushing up from the mantle. Tracing their way around the global ocean, this system of underwater volcanoes forms the longest mountain range on Earth. Fracture Zones are linear transform faults that develop perpendicular to the line of the mid-ocean ridge which can offset the ridge line and divide it into segments. The following are examples of <em>mid-ocean ridges</em> found on the floor of the Pacific Ocean.<br> <p>East Pacific Rise (Figure 3)<br>Pacific-Antarctic Ridge (Figure 3)</p>"
"text": "The <em>mid-ocean ridge </em>(see Figure 1), rising up from the <em>abyssal plain</em>, is an underwater mountain range over 64,000 km (40,000 mi) long, reaching an average depth of 2,400 m (8,000 ft). Mid-ocean ridges form at divergent plate boundaries where two tectonic plates are moving apart and magma  pushing up from the mantle creates new crust. Tracing their way around the global ocean, this system of underwater volcanoes forms the longest mountain range on earth. Fracture zones are linear transform faults that develop perpendicular to the line of the mid-ocean ridge, which can offset the ridge line and divide it into segments. The following are examples of mid-ocean ridges found on the floor of the Pacific Ocean:<br> <p>East Pacific Rise (Figure 3)<br>Pacific-Antarctic Ridge (Figure 3)</p>"
},
"undersea terrain features": {
"text": "The Abyssal Plain is commonly interrupted by a variety of commonly named undersea terrain features including <em>seamounts</em>, <em>guyots</em>, <em>ridges</em>, and <em>plateaus</em>. <em>Seamounts</em> (see Figure 1) are submarine mountains at least 1,000 m (3,300 ft) high formed from individual volcanoes on the ocean floor. They are distinct from the plate-boundary volcanic system of the mid-ocean ridges, because <em>seamounts</em> tend to be circular or conical. A circular collapse caldera is often centered at the summit, evidence of a magma chamber within the volcano. Flat topped <em>seamounts</em> are known as <em>guyots</em>. Long chains of <em>seamounts</em> are often fed by \"hot spots\" in the deep mantle. These hot spots are associated with stationary plumes of molten rock rising from deep within the Earth's mantle. These hot spot plumes melt through the overlying tectonic plate as it moves and supplies magma to the active volcanic island at the end of the chain of volcanic islands and <em>seamounts</em>. An undersea <em>ridge</em> is an elongated elevation of varying complexity and size, generally having steep sides. An undersea <em>plateau</em> is a large, relatively flat elevation that is higher than the surrounding relief with one or more relatively steep sides. Although submerged, these features can reach close to sea level. The following are examples of <em>undersea terrain features</em> found on the floor of the Pacific Ocean.<br> <p>Caroline Seamounts (Figure 5)<br>East Mariana Ridge (Figure 4)<br>Emperor Seamount Chain (Figure 2)<br>Hawaiian Ridge (Figure 2)<br>Lord Howe Seamount Chain (Figure 4)<br>Louisville Ridge (Figure 4)<br>Kapingamarangi (Ontong-Java) Rise (Figure 5); note - largest submarine plateau<br>Macclesfield Bank (Figure 5)<br>Marshall Seamounts (Figure 2)<br>Magellan Seamounts (Figure 2)<br>Mid-Pacific Seamounts (Figure 2)<br>Reed Tablemount (Figure 5)<br>Shatsky Rise (Figure 2); note - third largest submarine plateau<br>Tonga-Kermadec Ridge (Figure 4)</p>"
"text": "The Abyssal Plain is commonly interrupted by a variety of commonly named undersea terrain features including <em>seamounts</em>, <em>guyots</em>, <em>ridges</em>, and <em>plateaus</em>. <br><br><em>Seamounts</em> (see Figure 1) are submarine mountains at least 1,000 m (3,300 ft) high formed from individual volcanoes on the ocean floor. They are distinct from the plate-boundary volcanic system of the mid-ocean ridges, because seamounts tend to be circular or conical. A circular-collapse caldera is often centered at the summit, evidence of a magma chamber within the volcano. \"Hot spots\" in the deep mantle often feed long chains of seamounts. These hot spots are associated with stationary plumes of molten rock rising from deep within the Earth's mantle. The hot-spot plumes melt through the overlying tectonic plate as it moves and supplies magma to the active volcanic island at the end of the chain of volcanic islands and seamounts. <br><br>Flat topped seamounts are known as <em>guyots</em>. <br><br>An undersea <em>ridge</em> is an elongated elevation of varying complexity and size, generally having steep sides. <br><br>An undersea <em>plateau</em> is a large, relatively flat elevation that is higher than the surrounding relief with one or more relatively steep sides. Although submerged, these features can reach close to sea level. <br><br>The following are examples of undersea terrain features found on the floor of the Pacific Ocean:<br> <p>Caroline Seamounts (Figure 5)<br>East Mariana Ridge (Figure 4)<br>Emperor Seamount Chain (Figure 2)<br>Hawaiian Ridge (Figure 2)<br>Lord Howe Seamount Chain (Figure 4)<br>Louisville Ridge (Figure 4)<br>Kapingamarangi (Ontong-Java) Rise (Figure 5); note - largest submarine plateau<br>Macclesfield Bank (Figure 5)<br>Marshall Seamounts (Figure 2)<br>Magellan Seamounts (Figure 2)<br>Mid-Pacific Seamounts (Figure 2)<br>Reed Tablemount (Figure 5)<br>Shatsky Rise (Figure 2); note - third largest submarine plateau<br>Tonga-Kermadec Ridge (Figure 4)</p>"
},
"ocean trenches": {
"text": "<em>Ocean trenches</em> (see Figure 1) are the deepest parts of the ocean floor and are created by the process of subduction. <em>Trenches</em> form along convergent boundaries where tectonic plates are moving toward each other, and one plate sinks (is subducted) under another. The location where the sinking of a plate occurs is called a subduction zone. Subduction can occur when oceanic crust collides with and sinks under (subducts) continental crust resulting in volcanic, seismic, and mountain-building processes. Subduction can also occur in the convergence of two oceanic plates where one will sink under the other and in the process create a deep <em>ocean trench</em>. Subduction processes in oceanic-oceanic plate convergence also result in the formation of volcanoes. Over millions of years, the erupted lava and volcanic debris pile up on the ocean floor until a submarine volcano rises above sea level to form a <em>volcanic island</em>. Such volcanoes are typically strung out in chains called island arcs. As the name implies, volcanic island arcs, which closely parallel the <em>trenches</em>, are generally curved. The following are examples of <em>ocean trenches</em> found on the floor of the Pacific Ocean.<br> <p>Aleutian Trench (Figure 2)<br>Chile Trench (Figure 3)<br>Izu-Ogasawara Trench (Figure 2)<br>Japan Trench (Figure 2)<br>Kermadec Trench (Figure 3, 4)<br>Kuril-Kamchatka Trench (Figure 2)<br>Manus Trench (Figure 4)<br>Mariana Trench (Figure 2, 4); note - deepest ocean trench<br>Middle America Trench (Figure 3)<br>Nansei-Shoto Trench (Figure 5)<br>Palau Trench (Figure 2, 4)<br>Philippine Trench (Figure 4)<br>Peru-Chile Trench (Figure 3)<br>South New Hebrides Trench (Figure 4)<br>Tonga Trench (Figure 3, 4)<br>Yap Trench (Figure 2, 4)</p>"
"text": "<em>Ocean trenches</em> (see Figure 1) are the deepest parts of the ocean floor and are created by the process of subduction. Trenches form along convergent boundaries where tectonic plates are moving toward each other, and one plate sinks (is subducted) under another. The location where the sinking of a plate occurs is called a subduction zone. Subduction can occur when oceanic crust collides with and sinks under (subducts) continental crust resulting in volcanic, seismic, and mountain-building processes. Subduction can also occur in the convergence of two oceanic plates, where one will sink under the other and in the process create a deep ocean trench. <br><br>Subduction processes in oceanic-to-oceanic plate convergence also result in the formation of volcanoes. Over millions of years, the erupted lava and volcanic debris pile up on the ocean floor until a submarine volcano rises above sea level to form a <em>volcanic island</em>. Such volcanoes are typically strung out in curved chains called island arcs. <br><br>The following are examples of ocean trenches found on the floor of the Pacific Ocean:<br> <p>Aleutian Trench (Figure 2)<br>Chile Trench (Figure 3)<br>Izu-Ogasawara Trench (Figure 2)<br>Japan Trench (Figure 2)<br>Kermadec Trench (Figure 3, 4)<br>Kuril-Kamchatka Trench (Figure 2)<br>Manus Trench (Figure 4)<br>Mariana Trench (Figure 2, 4); note - deepest ocean trench<br>Middle America Trench (Figure 3)<br>Nansei-Shoto Trench (Figure 5)<br>Palau Trench (Figure 2, 4)<br>Philippine Trench (Figure 4)<br>Peru-Chile Trench (Figure 3)<br>South New Hebrides Trench (Figure 4)<br>Tonga Trench (Figure 3, 4)<br>Yap Trench (Figure 2, 4)</p>"
},
"atolls": {
"text": "<em>Atolls</em> are the remains of dormant volcanic islands. In warm tropical oceans, coral colonies establish themselves on the margins of the island. Then, over time, the high elevation of the island collapses and erodes away to sea level leaving behind an outline of the island in the form of the fringing coral reef. The resulting low island is typified by the coral reef surrounding a low elevation of sand and coral above sea level with an interior shallow lagoon. Often times the remaining dry land is broken into a ring of islets. Some lagoons can be hundreds of square kilometers. It may take as long as 300,000 years for an <em>atoll</em> formation to occur. <em>Guyots </em>are submerged atoll structures, which explains why they are flat topped seamounts. The following are examples of <em>atolls</em> found in the Pacific Ocean; for more information see the following entries in The World Factbook.<br><br>Federated States of Micronesia<br>French Polynesia<br>Kiribati<br>Marshall Islands<br>Midway Island<br>Tonga<br>Tuvalu<br>US Pacific Island Wildlife Refuges<br>Vanuatu<br>Wake Island"
"text": "<em>Atolls</em> are the remains of dormant volcanic islands. In warm tropical oceans, coral colonies establish themselves on the margins of the island. Then, over time, the high elevation of the island collapses and erodes away to sea level, leaving behind an outline of the island in the form of the fringing coral reef. The resulting low island is typified by the coral reef that surrounds a low elevation of sand and coral, with an interior shallow lagoon. Often the remaining dry land is broken into a ring of islets, and some lagoons can be hundreds of square kilometers. <br><br><em>Guyots </em>are submerged atoll structures, which explains why they are flat-topped seamounts. <br><br>The following are examples of atolls found in the Pacific Ocean, and because most of these are also countries or territories, they have entries in <em>The World Factbook</em> with additional information:<br><br>Federated States of Micronesia<br>French Polynesia<br>Kiribati<br>Marshall Islands<br>Midway Island<br>Tonga<br>Tuvalu<br>Vanuatu<br>Wake Island"
}
},
"Elevation": {
@ -68,29 +68,26 @@
"text": "sea level"
},
"lowest point": {
"text": "Challenger Deep in the Mariana Trench -10,924 m<br>note - the Pacific Ocean is the deepest ocean basin"
"text": "Challenger Deep in the Mariana Trench -10,924 m; note - the Pacific Ocean is the deepest ocean basin"
},
"mean depth": {
"text": "-4,080 m"
},
"ocean zones": {
"text": "Composed of water and in a fluid state, the ocean is delimited differently than the solid continents. The Ocean is divided into three zones based on depth and light level. Although some sea creatures depend on light to live, others can do without it. Sunlight entering the water may travel about 1,000 m into the oceans under the right conditions, but there is rarely any significant light beyond 200 m.<br><br>The upper 200 m (656 ft) of the ocean is called the euphotic, or \"sunlight,\" zone. This zone contains the vast majority of commercial fisheries and is home to many protected marine mammals and sea turtles. Only a small amount of light penetrates beyond this depth. <br><br>The zone between 200 m (656 ft) and 1,000 m (3,280 ft) is usually referred to as the \"twilight\" zone, but is officially the dysphotic zone. In this zone, the intensity of light rapidly dissipates as depth increases. Such a minuscule amount of light penetrates beyond a depth of 200 m that photosynthesis is no longer possible.<br><br>The aphotic, or \"midnight,\" zone exists in depths below 1,000 m (3,280 ft). Sunlight does not penetrate to these depths and the zone is bathed in darkness."
"text": "Composed of water and in a fluid state, the ocean is delimited differently than the solid continents. It is divided into three zones based on depth and light level. Sunlight entering the water may travel about 1,000 m into the oceans under the right conditions, but there is rarely any significant light beyond 200 m.<br><br>The upper 200 m (656 ft) of the ocean is called the euphotic, or \"sunlight,\" zone. This zone contains the vast majority of commercial fisheries and is home to many protected marine mammals and sea turtles. Only a small amount of light penetrates beyond this depth. <br><br>The zone between 200 m (656 ft) and 1,000 m (3,280 ft) is usually referred to as the \"twilight\" zone, but is officially the dysphotic zone. In this zone, the intensity of light rapidly dissipates as depth increases. Such a minuscule amount of light penetrates beyond a depth of 200 m that photosynthesis is no longer possible.<br><br>The aphotic, or \"midnight,\" zone exists in depths below 1,000 m (3,280 ft). Sunlight does not penetrate to these depths, and the zone is bathed in darkness."
}
},
"Natural resources": {
"text": "oil and gas fields, polymetallic nodules, sand and gravel aggregates, placer deposits, fish"
},
"Natural hazards": {
"text": "surrounded by a zone of violent volcanic and earthquake activity sometimes referred to as the \"Pacific Ring of Fire\"; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Fire; 80% of tsunamis, caused by volcanic or seismic events, occur within the \"Pacific Ring of Fire\"; subject to tropical cyclones (typhoons) in southeast and east Asia from May to December (most frequent from July to October); tropical cyclones (hurricanes) may form south of Mexico and strike Central America and Mexico from June to October (most common in August and September); cyclical El Nino/La Nina phenomenon occurs in the equatorial Pacific, influencing weather in the Western Hemisphere and the western Pacific; ships subject to superstructure icing in extreme north from October to May; persistent fog in the northern Pacific can be a maritime hazard from June to December"
"text": "surrounded by a zone of violent volcanic and earthquake activity sometimes referred to as the \"Pacific Ring of Fire\"; up to 90% of the world's earthquakes and some 75% of the world's volcanoes occur within the Ring of Fire; 80% of tsunamis, caused by volcanic or seismic events, occur within the \"Pacific Ring of Fire\"; subject to tropical cyclones (typhoons) in southeast and east Asia from May to December (most frequent from July to October); tropical cyclones (hurricanes) may form south of Mexico and strike Central America and Mexico from June to October (most common in August and September); cyclical El Ni&ntilde;o/La Ni&ntilde;a phenomenon occurs in the equatorial Pacific, influencing weather in the Western Hemisphere and the western Pacific; ships subject to superstructure icing in extreme north from October to May; persistent fog in the northern Pacific can be a maritime hazard from June to December"
},
"Geography - note": {
"text": "the major chokepoints are the Bering Strait, Panama Canal, Luzon Strait, and the Singapore Strait; the Equator divides the Pacific Ocean into the North Pacific Ocean and the South Pacific Ocean; dotted with low coral islands and rugged volcanic islands in the southwestern Pacific Ocean; much of the Pacific Ocean's rim lies along the Ring of Fire, a belt of active volcanoes and earthquake epicenters that accounts for up to 90% of the world's earthquakes and some 75% of the world's volcanoes; the Pacific Ocean is the deepest ocean basin averaging 4,000 m in depth"
}
},
"People and Society": {
"Contraceptive prevalence rate": {
"text": "NA"
}
},
"Environment": {
"Environment - current issues": {
@ -100,7 +97,7 @@
"text": "planetary air pressure systems and resultant wind patterns exhibit remarkable uniformity in the south and east; trade winds and westerly winds are well-developed patterns, modified by seasonal fluctuations; tropical cyclones (hurricanes) may form south of Mexico from June to October and affect Mexico and Central America; continental influences cause climatic uniformity to be much less pronounced in the eastern and western regions at the same latitude in the North Pacific Ocean; the western Pacific is monsoonal - a rainy season occurs during the summer months, when moisture-laden winds blow from the ocean over the land, and a dry season during the winter months, when dry winds blow from the Asian landmass back to the ocean; tropical cyclones (typhoons) may strike southeast and east Asia from May to December"
},
"Marine fisheries": {
"text": "<p>the Pacific Ocean fisheries are the most important in the world accounting for 58.1%, or 45,800,000 mt, of the global marine capture in 2020; of the six regions delineated by the Food and Agriculture Organization in the Pacific Ocean, the following are the most important:</p> <p><em>Northwest Pacific</em> region (Region 61) is the worlds most important fishery producing 24.3% of the global catch or 19,150,000 mt in 2020; it encompasses the waters north of 20º north latitude and west of 175º west longitude with the major producers including China (29,080726 mt), Japan (3,417,871 mt), South Korea (1,403,892 mt), and Taiwan (487,739 mt); the principal catches include Alaska Pollock, Japanese anchovy, chub mackerel, and scads</p> <p><em>Western Central Pacific</em> region (Region 71) is the worlds second most important fishing region producing 16.8%, or 13,260,000 mt, of the global catch in 2020; tuna is the most important species in this region; the region includes the waters between 20º North and 25º South latitude and west of 175º West longitude with the major producers including Indonesia (6,907,932 mt), Vietnam (4,571,497 mt), Philippines (2,416,879 mt), Thailand (1,509,574 mt), and Malaysia (692,553 mt); the principal catches include Skipjack and Yellowfin tuna, sardinellas, and cephalopods</p> <p><em>Southeast Pacific </em>region (Region 87) is the third major Pacific fishery and third largest in the world producing 10.7%, or 8,400,000 mt, of the global catch in 2020; this region includes the nutrient rich upwelling waters off the west coast of South America between 5º North and 60º South latitude and east of 120º West longitude with the major producers including Peru (4,888,730 mt), Chile (3,298,795 mt), and Ecuador (1,186,249 mt); the principal catches include Peruvian anchovy (68.5% of the catch), Jumbo flying squid, and Chilean jack mackerel</p> <em>Pacific Northeast</em> region (Region 67) is the fourth largest Pacific Ocean fishery and eighth largest in the world producing 3.6% of the global catch or 2,860,000 mt in 2020; this region encompasses the waters north of 40º North latitude and east of 175º West longitude including the Gulf of Alaska and Bering Sea with the major producers including the US (3,009,568 mt), Canada (276,677 mt), and Russia (6,908 mt); the principal catches include Alaska pollock, Pacific cod, and North Pacific hake<br><br><strong>Regional fisheries bodies:</strong> Commission for the Conservation of Southern Bluefin Tuna, Inter-American Tropical Tuna Commission, International  Council for the Exploration of the Seas, North Pacific Anadromous Fish Commission, North Pacific Fisheries Commission, South Pacific Regional Fisheries Management Organization, Southeast Asian Fisheries Development Center, Western and Central Pacific Fisheries Commission"
"text": "<p>the Pacific Ocean fisheries are the most important in the world, accounting for 58.1%, or 45,800,000 mt, of the global marine capture in 2020; of the six regions delineated by the Food and Agriculture Organization in the Pacific Ocean, the following are the most important:</p> <p><em>Northwest Pacific</em> region (Region 61) is the worlds most important fishery, producing 24.3% of the global catch or 19,150,000 mt in 2020; it encompasses the waters north of 20º north latitude and west of 175º west longitude, with the major producers including China (29,080726 mt), Japan (3,417,871 mt), South Korea (1,403,892 mt), and Taiwan (487,739 mt); the principal catches include Alaska pollock, Japanese anchovy, chub mackerel, and scads</p> <p><em>Western Central Pacific</em> region (Region 71) is the worlds second most important fishing region producing 16.8%, or 13,260,000 mt, of the global catch in 2020; tuna is the most important species in this region; the region includes the waters between 20º North and 25º South latitude and west of 175º West longitude with the major producers including Indonesia (6,907,932 mt), Vietnam (4,571,497 mt), Philippines (2,416,879 mt), Thailand (1,509,574 mt), and Malaysia (692,553 mt); the principal catches include skipjack and yellowfin tuna, sardinellas, and cephalopods</p> <p><em>Southeast Pacific </em>region (Region 87) is the third largest fishery in the world, producing 10.7%, or 8,400,000 mt, of the global catch in 2020; this region includes the nutrient-rich waters off the west coast of South America between 5º North and 60º South latitude and east of 120º West longitude, with the major producers including Peru (4,888,730 mt), Chile (3,298,795 mt), and Ecuador (1,186,249 mt); the principal catches include Peruvian anchovy (68.5% of the catch), jumbo flying squid, and Chilean jack mackerel</p> <em>Pacific Northeast</em> region (Region 67) is the eighth largest fishery in the world, producing 3.6% of the global catch or 2,860,000 mt in 2020; this region encompasses the waters north of 40º North latitude and east of 175º West longitude, including the Gulf of Alaska and Bering Sea, with the major producers including the US (3,009,568 mt), Canada (276,677 mt), and Russia (6,908 mt); the principal catches include Alaska pollock, Pacific cod, and North Pacific hake<br><br><strong>Regional fisheries bodies:</strong> Commission for the Conservation of Southern Bluefin Tuna, Inter-American Tropical Tuna Commission, International Council for the Exploration of the Seas, North Pacific Anadromous Fish Commission, North Pacific Fisheries Commission, South Pacific Regional Fisheries Management Organization, Southeast Asian Fisheries Development Center, Western and Central Pacific Fisheries Commission"
}
},
"Government": {

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@ -1316,7 +1316,7 @@
},
"Terrorism": {
"Terrorist group(s)": {
"text": "Hizballah (2022)",
"text": "Hizballah",
"note": "<strong>note:</strong> details about the history, aims, leadership, organization, areas of operation, tactics, targets, weapons, size, and sources of support of the group(s) appear(s) in the Terrorism reference guide"
}
},

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@ -1276,7 +1276,7 @@
"text": "information varies; approximately 1.5 million active personnel (approximately 1.25 million Army; 65,000 Navy; 140,000 Air Force; 12,000 Coast Guard) (2023)"
},
"Military equipment inventories and acquisitions": {
"text": "the majority of the military's inventory consists of Russian- and Soviet-origin equipment; there is a smaller, but growing mix of Western and domestically produced arms; Russia continues to be the leading provider of arms to India, although in recent years India has increased acquisitions from other suppliers, including France, Israel, and the US; it is one of the world's largest importers of arms; India's defense industry is capable of producing a range of air, land, missile, and naval weapons systems for both domestic use and export; it also produces weapons systems under license (2023)"
"text": "much of the military's inventory consists of Russian- and Soviet-origin equipment; there is a smaller, but growing mix of Western and domestically produced arms; Russia continues to be the leading provider of arms to India, although in recent years India has increased acquisitions from other suppliers, including France, Israel, and the US; it is one of the world's largest importers of arms; India's defense industry is capable of producing a range of air, land, missile, and naval weapons systems for both domestic use and export; it also produces weapons systems under license (2023)"
},
"Military service age and obligation": {
"text": "ages vary by service, but generally 16.5-27 years of age for voluntary military service for men and women; no conscription (2023)",

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@ -754,7 +754,7 @@
"note": "<b>note:</b> top ten agricultural products based on tonnage"
},
"Industries": {
"text": "tourism, carpets, textiles; small rice, jute, sugar, and oilseed mills; cigarettes, cement and brick production"
"text": "tourism, carpets, textiles, small rice, jute, sugar, oilseed mills, cigarettes, cement and brick production"
},
"Industrial production growth rate": {
"text": "1.38% (2023 est.)",