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lect 21 - BWh n Mexico sw U.S Atacama(SA Sahara Namib...

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'B' CLIMATES * Areas where the Potential Evaporation > Precipitation * Potential Evapotranspiration : PE: the amount of moisture that, if it were available, would evaporate from a given area * '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 inches) (10-20 inches) BWh: Tropical Desert BSh: Tropical Steppe BWk: Mid-latitude Desert BSk: Midlatitude Steppe BWh & BSh: Tropical Desert & Tropical Steppe ( fig 10.26 pg 279) Location
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Unformatted text preview: BWh: n Mexico, sw U.S .; Atacama (SA); Sahara, Namib, Kalahari (Africa); Saudi Arabia; central Australian deserts BSh: the Sahel (Africa) parts of eastern Australia (Fig. 10.28 pg 280) Characteristics : * very low precipitation; * highest T°'s ever recorded on earth (136°F in Libya) Mechanisms : * dominated by STH cells all year BWk & BSk: Mid-latitude Desert & Steppen ( fig 10.27 pg 280) Location : poleward of BSh & BWh areas; BWk: 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) Characteristics : hot summers, BUT cool to cold winters Mechanisms : * Rainshadow effect; Great Basin & Great Plains, Patagonia, Russian Steppe, Takia Makan * remoteness from water sources ( continentally): Gobi Dessert, Russian Steppe (fig 10.29 pg 281)...
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