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Polar bear in Manitoba, Canada. November 2004. Polar seas is a collective term for the Arctic Ocean (about 4-5 percent of Earth's oceans) and the southern part of the Southern Ocean (south of Antarctic Convergence, about 10 percent of Earth's oceans). In the coldest years, sea ice can cover around 13 percent of the Earth's total surface at its ...
Much of the Arctic Ocean is covered by sea ice that varies in extent and thickness seasonally. The mean extent of the Arctic sea ice has been continuously decreasing in the last decades, declining at a rate of currently 12.85% per decade since 1980 from the average winter value of 15,600,000 km 2 (6,023,200 sq mi). [48]
List of ancient oceans – List of Earth's former oceans; List of seas; Marginal sea – A sea partially enclosed by islands, archipelagos, or peninsulas; Oceanography – Study of physical, chemical, and biological processes in the ocean; Polar seas – Collective term for the Arctic Ocean and the southern part of the Southern Ocean
The Antarctic Convergence is a zone approximately 32 to 48 km (20 to 30 mi) wide, varying in latitude seasonally and in different longitudes, extending across the Atlantic, Pacific, and Indian oceans between the 48th and 61st parallels of south latitude.
After four months of winter darkness, the sun returns to reveal a frozen ocean covered in ice. Mother polar bears emerge from their hillside dens and lead their cubs down to the sea ice to hunt, while a young male and female bear forge a surprising friendship out on the ice. For others, the frozen sea is a trap.
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Polar Sea may refer to: The Arctic Ocean; The Southern Ocean; USCGC Polar Sea, a United States Coast Guard icebreaker; The Open Polar Sea, a hypothesized ice-free ...
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