Ice Drift
Sea ice is frozen seawater. Because ice is less dense than its melt, sea ice floats (as does fresh water ice: icebergs, lake and river ice, icicles, snow, hail, frozen tap water, etc.). Sea ice covers about 7% of the Earth’s surface, or about 12% of the world’s oceans. In the North, it is found in the Arctic Ocean, in areas just below it and in other cold oceans, seas and gulfs; in the Antarctic, it occurs in various areas around Antarctica (the continent). Much of the world's sea ice is enclosed within the polar ice packs in the Earth's polar regions: the Arctic ice pack of the Arctic Ocean and the Antarctic ice pack of the Southern Ocean. Polar packs undergo a significant yearly cycling in surface extent (see Climate change in the Arctic), a natural process upon which depends the Arctic ecology, including the ocean's ecosystems. Due to the action of winds, currents and temperature fluctuations, sea ice is very dynamic, leading to a wide variety of ice types and features. Sea ice may be contrasted with icebergs, which are chunks of ice shelves or glaciers that calve into the ocean. Depending on location, sea ice expanses may also incorporate icebergs.
Read more about Ice Drift: Sea Ice: General Features and Dynamics, Formation of Sea Ice, Yearly Freeze and Melt Cycle, Monitoring and Observations, Modelling, Ecology, Relationship To Global Warming and Climate Change
Famous quotes containing the words ice and/or drift:
“The improved American highway system ... isolated the American-in-transit. On his speedway ... he had no contact with the towns which he by-passed. If he stopped for food or gas, he was served no local fare or local fuel, but had one of Howard Johnsons nationally branded ice cream flavors, and so many gallons of Exxon. This vast ocean of superhighways was nearly as free of culture as the sea traversed by the Mayflower Pilgrims.”
—Daniel J. Boorstin (b. 1914)
“To drift with every passion till my soul
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Is it for this that I have given away
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Methinks my life is a twice-written scroll
Scrawled over on some boyish holiday”
—Oscar Wilde (18541900)