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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 ...
Visualization of the ice and snow covering Earth's northern and southern polar regions Northern Hemisphere permafrost (permanently frozen ground) in purple. The polar regions, also called the frigid zones or polar zones, of Earth are Earth's polar ice caps, the regions of the planet that surround its geographical poles (the North and South Poles), lying within the polar circles.
The Arctic Ocean is the smallest and shallowest of the world's five oceanic divisions. [1] It spans an area of approximately 14,060,000 km 2 (5,430,000 sq mi) and is the coldest of the world's oceans.
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The Arctic Basin has snow 320 days out of the year while the Arctic Seas have snow cover 260 days a year. [8] The thickness of the snow averages 30–40 cm (12–16 in). [ 8 ] In Greenland , temperatures have an average temperature of −40 °C (−40 °F) in the winter and in the summer the temperatures reach −12 °C (10 °F).
A third division is by latitude: from polar seas with ice shelves, sea ice and icebergs, to temperate and tropical waters. [3]: 150–151 Coral reefs, the so-called "rainforests of the sea", occupy less than 0.1 percent of the world's ocean surface, yet their ecosystems include 25 percent of all marine species. [85]
This is a list of rivers of Antarctica. Although they are variously named rivers , creeks or streams , due to the climate of the region, those listed are technically all meltwater streams . Overview of waterways in Antarctica
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 ...