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Antarctica

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Antarctic Circle

Antarctic Circle  

The area of land and sea that lies south of latitude 66°S, around Antarctica.
Antarctic Convergence

Antarctic Convergence  

A line of convergence in the ocean surrounding Antarctica between latitudes 50° S and 60° S, where cold surface water from Antarctica (Antarctic Surface Water) sinks below warmer, less saline water ...
Antarctic ozone hole

Antarctic ozone hole  

The seasonal depletion of ozone over much of Antarctica. See also ozone hole.
Antarctic realm

Antarctic realm  

A biogeographical realm in the southern hemisphere, which contains a variety of ecosystems from temperate forest and grassland in New Zealand to tundra and ice sheets in Antarctica.
Arctic

Arctic  

The area lying above 66.5° North that is dominated by the Arctic Ocean but also includes large land areas in Canada, Russia, Greenland, Scandinavia, Iceland, and Alaska. Some of the land areas, ...
carbon dioxide

carbon dioxide  

A colourless, odourless gas which is the fourth most abundant component of the air in the homosphere, amounting to about 0.035 per cent by volume. It is released by volcanoes, part of the source ...
cold climate

cold climate  

A climate that has temperatures of 10° to 20°C for up to four months a year, and is cooler over the rest of the year, as found in places like the Arctic and Antarctica. The two biomes associated with ...
continent

continent  

One of the seven major land areas on the Earth, which are North America, South America, Europe, Africa, Asia, Australia, and Antarctica.
global warming

global warming  

The gradual increase in the overall temperature of the earth's atmosphere due to the greenhouse effect caused by increased levels of carbon dioxide, CFCs, and other pollutants.
Greenland Ice Sheet

Greenland Ice Sheet  

The Greenland ice sheet covers about 80 percent of the island of Greenland, between 60° and 83° N latitude in the Atlantic Ocean. It is the second largest ice sheet ...
polar ice cap

polar ice cap  

An area of permanent ice at high latitudes, beyond the tundra, where average temperature in each month is below freezing point, and annual precipitation is low (usually less than 250 millimetres a ...
South Pole

South Pole  

The most southerly point on Earth, at 90°S latitude in the southern hemisphere; the southern end of the Earth's rotational axis. Contrast North Pole. See also Antarctica.

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