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World > Oceania > United States Pacific Island Wildlife Refuges > Geography (Facts)

United States Pacific Island Wildlife Refuges - Geography (Facts)
Location: Oceania
Baker Island: atoll in the North Pacific Ocean 1,830 nm (3,389 km) southwest of Honolulu, about half way between Hawaii and Australia
Howland Island: island in the North Pacific Ocean 1,815 nm (3,361 km) southwest of Honolulu, about half way between Hawaii and Australia
Jarvis Island: island in the South Pacific Ocean 1,305 nm (2,417 km) south of Honolulu, about half way between Hawaii and the Cook Islands
Johnston Atoll: atoll in the North Pacific Ocean 717 nm (1,328 km) southwest of Honolulu, about one-third of the way from Hawaii to the Marshall Islands
Kingman Reef: reef in the North Pacific Ocean 930 nm (1,722 km) south of Honolulu, about half way between Hawaii and American Samoa
Midway Islands: atoll in the North Pacific Ocean 1,260 nm (2,334 km) northwest of Honolulu near the end of the Hawaiian Archipelago, about one-third of the way from Honolulu to Tokyo
Palmyra Atoll: atoll in the North Pacific Ocean 960 nm (1,778 km) south of Honolulu, about half way between Hawaii and American Samoa
Geographic coordinates: Baker Island: 0 13 N, 176 28 W
Howland Island: 0 48 N, 176 38 W
Jarvis Island: 0 23 S, 160 01 W
Johnston Atoll: 16 45 N, 169 31 W
Kingman Reef: 6 23 N, 162 25 W
Midway Islands: 28 12 N, 177 22 W
Palmyra Atoll: 5 53 N, 162 05 W
Map references: Oceania
Area: total - 6,959.41 sq km; emergent land - 22.41 sq km; submerged - 6,937 sq km
Baker Island: total - 129 sq km; emergent land - 2.1 sq km; submerged - 127 sq km
Howland Island: total - 139 sq km; emergent land - 2.6 sq km; submerged - 136 sq km
Jarvis Island: total - 152 sq km; emergent land - 5 sq km; submerged - 147 sq km
Johnston Atoll: total - 276.6 sq km; emergent land - 2.6 sq km; submerged - 274 sq km
Kingman Reef: total - 1,958.01 sq km; emergent land - 0.01 sq km; submerged - 1,958 sq km
Midway Islands: total - 2,355.2 sq km; emergent land - 6.2 sq km; submerged - 2,349 sq km
Palmyra Atoll: total - 1,949.9 sq km; emergent land - 3.9 sq km; submerged - 1,946 sq km
Area - comparative: Baker Island: about two and a half times the size of The Mall in Washington, DC
Howland Island: about three times the size of The Mall in Washington, DC
Jarvis Island: about eight times the size of The Mall in Washington, DC
Johnston Atoll: about four and a half times the size of The Mall in Washington, DC
Kingman Reef: a little more than one and a half times the size of The Mall in Washington, DC
Midway Islands: about nine times the size of The Mall in Washington, DC
Palmyra Atoll: about 20 times the size of The Mall in Washington, DC
Land boundaries: none
Coastline: Baker Island: 4.8 km
Howland Island: 6.4 km
Jarvis Island: 8 km
Johnston Atoll: 34 km
Kingman Reef: 3 km
Midway Islands: 15 km
Palmyra Atoll: 14.5 km
Maritime claims: territorial sea: 12 nm
exclusive economic zone: 200 nm
Climate: Baker, Howland, and Jarvis Islands: equatorial; scant rainfall, constant wind, burning sun
Johnston Atoll and Kingman Reef: tropical, but generally dry; consistent northeast trade winds with little seasonal temperature variation
Midway Islands: subtropical with cool, moist winters (December to February) and warm, dry summers (May to October); moderated by prevailing easterly winds; most of the 1,067 mm (42 in) of annual rainfall occurs during the winter
Palmyra Atoll: equatorial, hot; located within the low pressure area of the Intertropical Convergence Zone (ITCZ) where the northeast and southeast trade winds meet, it is extremely wet with between 4,000-5,000 mm (160-200 in) of rainfall each year
Terrain: low and nearly level sandy coral islands with narrow fringing reefs that have developed at the top of submerged volcanic mountains, which in most cases rise steeply from the ocean floor
Elevation extremes: lowest point: Pacific Ocean 0 m
highest point: Baker Island, unnamed location - 8 m; Howland Island, unnamed location - 3 m; Jarvis Island, unnamed location - 7 m; Johnston Atoll, Sand Island - 10 m; Kingman Reef, unnamed location - less than 1 m; Midway Islands, unnamed location - 13 m; Palmyra Atoll, unnamed location - 2 m
Natural resources: terrestrial and aquatic wildlife
Land use: arable land: 0%
permanent crops: 0%
other: 100% (2005)
Natural hazards: Baker, Howland, and Jarvis Islands: the narrow fringing reef surrounding the island can be a maritime hazard
Kingman Reef: wet or awash most of the time, maximum elevation of less than 1 m makes Kingman Reef a maritime hazard
Midway Islands, Johnston, and Palmyra Atolls: NA
Environment - current issues: Baker, Howland, and Jarvis Islands, and Johnston Atoll: no natural fresh water resources
Kingman Reef: none
Midway Islands and Palmyra Atoll: NA
Geography - note: Baker, Howland, and Jarvis Islands: scattered vegetation consisting of grasses, prostrate vines, and low growing shrubs; primarily a nesting, roosting, and foraging habitat for seabirds, shorebirds, and marine wildlife
Johnston Atoll: Johnston Island and Sand Island are natural islands, which have been expanded by coral dredging; North Island (Akau) and East Island (Hikina) are manmade islands formed from coral dredging; the egg-shaped reef is 34 km in circumference
Kingman Reef: barren coral atoll with deep interior lagoon; closed to the public
Midway Islands: a coral atoll managed as a national wildlife refuge and open to the public for wildlife-related recreation in the form of wildlife observation and photography
Palmyra Atoll: the high rainfall and resulting lush vegetation make the environment of this atoll unique among the US Pacific Island territories; it supports one of the largest remaining undisturbed stands of Pisonia beach forest in the Pacific


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