British Indian Ocean Territory (2006) | Southern Ocean (2006) | |
Airports | 1 (2006) | - |
Airports - with paved runways | total: 1
over 3,047 m: 1 (2006) |
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Area | total: 54,400 sq km
land: 60 sq km; Diego Garcia 44 sq km water: 54,340 sq km note: includes the entire Chagos Archipelago of 55 islands |
total: 20.327 million sq km
note: includes Amundsen Sea, Bellingshausen Sea, part of the Drake Passage, Ross Sea, a small part of the Scotia Sea, Weddell Sea, and other tributary water bodies |
Area - comparative | land area is about 0.3 times the size of Washington, DC | slightly more than twice the size of the US |
Background | Established as a territory of the UK in 1965, a number of the British Indian Ocean Territory (BIOT) islands were transferred to the Seychelles when it attained independence in 1976. Subsequently, BIOT has consisted only of the six main island groups comprising the Chagos Archipelago. The largest and most southerly of the islands, Diego Garcia, contains a joint UK-US naval support facility. All of the remaining islands are uninhabited. Former agricultural workers, earlier residents in the islands, were relocated primarily to Mauritius but also to the Seychelles, between 1967 and 1973. In 2000, a British High Court ruling invalidated the local immigration order that had excluded them from the archipelago, but upheld the special military status of Diego Garcia. | A large body of recent oceanographic research has shown that the Antarctic Circumpolar Current (ACC), an ocean current that flows from west to east around Antarctica, plays a crucial role in global ocean circulation. The region where the cold waters of the ACC meet and mingle with the warmer waters of the north defines a distinct border - the Antarctic Convergence - which fluctuates with the seasons, but which encompasses a discrete body of water and a unique ecologic region. The Convergence concentrates nutrients, which promotes marine plant life, and which in turn allows for a greater abundance of animal life. In the spring of 2000, the International Hydrographic Organization decided to delimit the waters within the Convergence as a fifth world ocean - the Southern Ocean - by combining the southern portions of the Atlantic Ocean, Indian Ocean, and Pacific Ocean. The Southern Ocean extends from the coast of Antarctica north to 60 degrees south latitude, which coincides with the Antarctic Treaty Limit and which approximates the extent of the Antarctic Convergence. As such, the Southern Ocean is now the fourth largest of the world's five oceans (after the Pacific Ocean, Atlantic Ocean, and Indian Ocean, but larger than the Arctic Ocean). It should be noted that inclusion of the Southern Ocean does not imply recognition of this feature as one of the world's primary oceans by the US Government. |
Climate | tropical marine; hot, humid, moderated by trade winds | 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 |
Coastline | 698 km | 17,968 km |
Country name | conventional long form: British Indian Ocean Territory
conventional short form: none abbreviation: BIOT |
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Dependency status | overseas territory of the UK; administered by a commissioner, resident in the Foreign and Commonwealth Office in London | - |
Diplomatic representation from the US | none (overseas territory of the UK) | - |
Diplomatic representation in the US | none (overseas territory of the UK) | - |
Disputes - international | Mauritius and Seychelles claim the Chagos Archipelago including Diego Garcia; in 2001 the former inhabitants of the Chagos Archipelago, evicted in 1965 and now residing chiefly in Mauritius, were granted UK citizenship and the right to repatriation; the UK resists the Chagossians' demand for an immediate return to the islands; repatriation is complicated by the exclusive US military lease of Diego Garcia that restricts access to the largest island in the chain; | Antarctic Treaty defers claims (see Antarctica entry), but Argentina, Australia, Chile, France, NZ, Norway, and UK assert claims (some overlapping), including the continental shelf in the Southern Ocean; several states have expressed an interest in extending those continental shelf claims under the United Nations Convention on the Law of the Sea (UNCLOS) to include undersea ridges; the US and most other states do not recognize the land or maritime claims of other states and have made no claims themselves (the US and Russia have reserved the right to do so); no formal claims exist in the waters in the sector between 90 degrees west and 150 degrees west |
Economy - overview | All economic activity is concentrated on the largest island of Diego Garcia, where joint UK-US defense facilities are located. Construction projects and various services needed to support the military installations are done by military and contract employees from the UK, Mauritius, the Philippines, and the US. There are no industrial or agricultural activities on the islands. When the Ilois return, they plan to reestablish sugarcane production and fishing. The country makes money by selling fishing licenses and postage stamps. | Fisheries in 2003-04 landed 136,262 metric tons, of which 87% (118,166 tons) was krill and 8% (11,182 tons) Patagonian toothfish, compared to 142,555 tons in 2002-03 of which 83% (117,728 tons) was krill and 12% (16,479 tons) Patagonian toothfish (estimated fishing from the area covered by the Convention of the Conservation of Antarctic Marine Living Resources (CCAMLR), which extends slightly beyond the Southern Ocean area). International agreements were adopted in late 1999 to reduce illegal, unreported, and unregulated fishing, which in the 2000-01 season landed, by one estimate, 8,376 metric tons of Patagonian and Antarctic toothfish. In the 2004-05 Antarctic summer 28,202 tourists, most of them seaborne (approximately 97%), visited the Southern Ocean and Antarctica, compared to 14,762 in 1999-2000. |
Electricity - consumption | NA kWh | - |
Electricity - production | NA kWh; note - electricity supplied by the US military | - |
Elevation extremes | lowest point: Indian Ocean 0 m
highest point: unnamed location on Diego Garcia 15 m |
lowest point: -7,235 m at the southern end of the South Sandwich Trench
highest point: sea level 0 m |
Environment - current issues | NA | increased solar ultraviolet radiation resulting from the Antarctic ozone hole in recent years, reducing marine primary productivity (phytoplankton) by as much as 15% and damaging the DNA of some fish; illegal, unreported, and unregulated fishing in recent years, especially the landing of an estimated five to six times more Patagonian toothfish than the regulated fishery, which is likely to affect the sustainability of the stock; large amount of incidental mortality of seabirds resulting from long-line fishing for toothfish
note: the now-protected fur seal population is making a strong comeback after severe overexploitation in the 18th and 19th centuries |
Environment - international agreements | - | 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)
note: 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 very cold polar surface waters to the south and the warmer waters to the north |
Executive branch | chief of state: Queen ELIZABETH II (since 6 February 1952)
head of government: Commissioner Tony CROMBIE (since January 2004); Administrator Tony HUMPHRIES (since February 2005); note - both reside in the UK cabinet: NA elections: none; the monarch is hereditary; commissioner and administrator appointed by the monarch |
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Flag description | white with six blue wavy horizontal stripes; the flag of the UK is in the upper hoist-side quadrant; the striped section bears a palm tree and yellow crown centered on the outer half of the flag | - |
Geographic coordinates | 6 00 S, 71 30 E; note - Diego Garcia 7 20 S, 72 25 E | 60 00 S, 90 00 E (nominally), but the Southern Ocean has the unique distinction of being a large circumpolar body of water totally encircling the continent of Antarctica; this ring of water lies between 60 degrees south latitude and the coast of Antarctica and encompasses 360 degrees of longitude |
Geography - note | archipelago of 55 islands; Diego Garcia, largest and southernmost island, occupies strategic location in central Indian Ocean; island is site of joint US-UK military facility | the major chokepoint is the Drake Passage between South America and Antarctica; the Polar Front (Antarctic Convergence) is the best natural definition of the northern extent of the Southern Ocean; it is a distinct region at the middle of the Antarctic Circumpolar Current that separates the very cold polar surface waters to the south from the warmer waters to the north; the Front and the Current extend entirely around Antarctica, reaching south of 60 degrees south near New Zealand and near 48 degrees south in the far South Atlantic coinciding with the path of the maximum westerly winds |
Irrigated land | 0 sq km | - |
Land boundaries | 0 km | - |
Land use | arable land: 0%
permanent crops: 0% other: 100% (2005) |
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Legal system | the laws of the UK, where applicable, apply | - |
Location | archipelago in the Indian Ocean, south of India, about one-half the way from Africa to Indonesia | body of water between 60 degrees south latitude and Antarctica |
Map references | Political Map of the World | Antarctic Region |
Maritime claims | territorial sea: 3 nm
exclusive fishing zone: 200 nm |
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Military - note | defense is the responsibility of the UK; the US lease on Diego Garcia expires in 2016 | - |
Natural hazards | NA | huge icebergs with drafts up to several hundred meters; smaller bergs and iceberg fragments; sea ice (generally 0.5 to 1 meter thick) with sometimes dynamic short-term variations and with large annual and interannual variations; deep continental shelf floored by glacial deposits varying widely over short distances; high winds and large waves much of the year; ship icing, especially May-October; most of region is remote from sources of search and rescue |
Natural resources | coconuts, fish, sugarcane | probable large and possible giant oil and gas fields on the continental margin, manganese nodules, possible placer deposits, sand and gravel, fresh water as icebergs; squid, whales, and seals - none exploited; krill, fishes |
Population | no indigenous inhabitants
note: approximately 1,200 former agricultural workers resident in the Chagos Archipelago, often referred to as Chagossians or Ilois, were relocated to Mauritius and the Seychelles in the 1960s and 1970s; in November 2000 they were granted the right of return by a British High Court ruling, though no timetable has been set; in November 2004, there were approximately 4,000 UK and US military personnel and civilian contractors living on the island of Diego Garcia (July 2006 est.) |
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Radio broadcast stations | AM 1, FM 2, shortwave 0 (1998) | - |
Telephone system | general assessment: separate facilities for military and public needs are available
domestic: all commercial telephone services are available, including connection to the Internet international: international telephone service is carried by satellite (2000) |
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Telephones - main lines in use | NA | - |
Television broadcast stations | 1 (1997) | - |
Terrain | flat and low (most areas do not exceed two meters in elevation) | the Southern Ocean is deep, 4,000 to 5,000 meters over most of its extent with only limited areas of shallow water; the Antarctic continental shelf is generally narrow and unusually deep, its edge lying at depths of 400 to 800 meters (the global mean is 133 meters); the Antarctic icepack grows from an average minimum of 2.6 million square kilometers in March to about 18.8 million square kilometers in September, better than a sixfold increase in area; the Antarctic Circumpolar Current (21,000 km in length) moves perpetually eastward; it is the world's largest ocean current, transporting 130 million cubic meters of water per second - 100 times the flow of all the world's rivers |
Transportation - note | - | Drake Passage offers alternative to transit through the Panama Canal |