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Arid

From Simple English Wikipedia, the free encyclopedia
Revision as of 12:25, 18 June 2012 by JAnDbot (talk | changes) (r2.7.2) (Robot: Adding zh:沙漠气候; modifying en:Desert climate)

An arid environment has a high deficit of rainfall or snow. So there is much less humidity added during the year than would be necessary for the demand for evaporation and transpiration. This is mostly due to the high temperatures and few storms that bring rainfall. Regions are classified as arid if their aridity index falls between 0.05 and 0.20.

Most deserts are semi-arid, arid or hyperarid, with the exception of Antarctica.