GEOG 2110L Lecture Notes - Taklamakan Desert, Gobi Desert, Evapotranspiration
17 Mar 2014
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Document Summary
* areas where the potential evaporation > precipitation. * potential evapotranspiration: the amount of moisture that would evaporate from a given area if it were available. * "b" climates are the only climates based on precipitation. ** general characteristics: * cover 25 - 35% of earth"s land area. * precip is quite variable, spatially & temporally. Types: bw: arid or desert bs: semi-arid or steppe (10-20 inches) (0-10 inches) * 3rd letter: h = hot & k = cool to cold. Bwh & bsh: tropical desert & tropical steppe. Location: centered on ~ 20 - 30 n & s n mexico, sw u. s. ; atacama (sa); sahara, namib, kalahari (africa); saudi arabia; central australian deserts. * highest t "s ever recorded on earth (136 f in libya) Mechanisms: * dominates the sth(sub-tropical high) cells all year. Great basin (u. s. ); patagonia(argentina); gobi desert area & takla makan area (mongolia/sw china) Bsk: great plains(u. s. ); turkey to central asia (russian steppe)
