Coastal & Marine Geology InfoBank

USGS CMG InfoBank: Desert Origins


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Comment: 09:50 - 10:22 (00:32)

Source: Annenberg/CPB Resources - Earth Revealed - 22. Wind, Dust and Deserts

Keywords: desert, subtropic, "equatorial air current", "rain shadow", land, "cold coastal current", "warm latitudes", polar

Our transcription: So there are several ways by which deserts can come into being:

subtropical descent of equatorial air currents,

rain shadow effects,

great distance of land mass from the sea,

cold coastal currents in warm latitudes,

and in polar regions, the inability of cold air masses to hold much moisture.

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U.S. Department of the Interior \| U.S. Geological Survey URL: http://walrus.wr.usgs.gov/infobank/programs/html/school/moviepage/20.01.10.html Page Contact: InfoBank staff Page Last Modified: Wed Aug 20 06:16:10 PDT 2008 (wcs)