on:
body of water mostly north of the Arctic Circle
Map references:
Arctic Region, Asia, North America, Standard Time Zones of the World
Area:
total area:
14.056 million km2
comparative area:
slightly more than 1.5 times the size of the US; smallest of the world's
four oceans (after Pacific Ocean, Atlantic Ocean, and Indian Ocean)
note:
includes Baffin Bay, Barents Sea, Beaufort Sea, Chukchi Sea, East Siberian
Sea, Greenland Sea, Hudson Bay, Hudson Strait, Kara Sea, Laptev Sea, and
other tributary water bodies
Coastline:
45,389 km
International disputes:
some maritime disputes (see littoral states); Svalbard is the focus of a
maritime boundary dispute between Norway and Russia
Climate:
polar climate characterized by persistent cold and relatively narrow annual
temperature ranges; 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
Terrain:
central surface covered by a perennial drifting polar icepack that averages
about 3 meters in thickness, although pressure ridges may be three times
that size; clockwise drift pattern in the Beaufort Gyral Stream, but nearly
straight line movement from the New Siberian Islands (Russia) to Denmark
Strait (between Greenland and Iceland); the ice pack is surrounded by open
seas during the summer, but more than doubles in size during the winter and
extends to the encircling land masses; the ocean floor is about 50%
continental shelf (highest percentage of any ocean) with the remainder a
central basin interrupted by three submarine ridges (Alpha Cordillera,
Nansen Cordillera, and Lomonsov Ridge); maximum depth is 4,665 meters in the
Fram Basin
Natural resources:
sand and gravel aggregates, placer deposits, polymetallic nodules, oil and
gas fields, fish, marine mammals (seals and whales)
Environment:
endangered marine species include walruses and whales; ice islands
occasionally break away from northern Ellesmere Island; icebergs calved from
glaciers in western Greenland and extreme northeastern Canada; maximum snow
cover in March or April about 20 to 50 centimeters over the frozen ocean and
lasts about 10 months; permafrost in islands; virtually icelocked from
October to June; fragile ecosystem slow to change and slow to recover from
disruptions or damage