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Antarctic oasis

From Wikipedia, the free encyclopedia

Henryk Arctowski Polish Antarctic Station, Arctowski Station, King George Island
Wright Valley, McMurdo Dry Valleys
Cape Hallett, Victoria Land
Holme Bay at Mawson Station, Mac. Robertson Land
Schirmacher Oasis, Princess Astrid Coast

An Antarctic oasis is a large area naturally free of snow and ice in the otherwise ice-covered continent of Antarctica.

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Transcription

Geology

In Antarctica there are, in addition to mountaintops and nunataks, other natural snow- and ice-free areas often referred to as "Antarctic oases" or "dry valleys".[1][2] These areas are surrounded by the Antarctic ice sheet or, in coastal areas, are situated between the ice sheet and the Antarctic ice shelves.

Antarctic oases and dry valleys develop in areas with particular regional weather patterns and geography. These areas have very low humidity and precipitation. Although these areas are very cold, sufficient solar energy is absorbed by the ground to melt what little snow does fall, or else it is scoured or sublimated by katabatic winds, leaving the underlying rock exposed.

Despite usually extreme aridity, some plants, in the form of bryophytes and lichens, can survive in Antarctic oases.

Geography

The larger oases (with their respective areas) are:

References

  • Riffenburgh, Beau Encyclopedia of the Antarctic, vol II (Routledge, New York, 2007, ISBN 0-415-97024-5)
  1. ^ http://iopscience.iop.org/1755-1315/1/1/012035/pdf/ees8_1_012035.pdf, IOP science, accessdate=2010-11-22
  2. ^ [1] Bernadette Hince, "The Antarctic dictionary: a complete guide to Antarctic English", 2000, Csiro Publishing, Collingwood, Australia, ISBN 0-9577471-1-X, accessdate=2010-11-22

Further reading

External links

This page was last edited on 30 October 2023, at 00:24
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