105-22 10-14 Deserts, wind

Equator average global temp 1998 e the geography of

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Unformatted text preview: 005] Where are Earth’s deserts? Equator Average global temp, 1998 E The Geography of Earth’s Climate Where deserts develop • 1) Atmospheric circulation (low-latitude deserts) — the Sahara, the Kalahari • 2) Location within continental interiors • 3) Orographic (rain shadow) deserts Sahara desert permafrost temperate forests rain shadow interior ` deserts low-latitude rainforests low-latitude Kalahari desert, SW Africa deserts rising air cools = rainfall descending air warms = hi evaporat’n rising air cools = rainfall Figure 19.3a “Westerlies” — China to USA “Tradewinds” — Sahara Why are there deserts? • 1) Atmospheric circulation • 2) Location within continental interiors • 3) Orographic (rain shadow) deserts Gobi n a kla Mak Ta Tibet Why are there deserts? • 1) Atmospheric circulation • 2) Location within continental interiors • 3) Orographic (rain shadow) deserts RAIN SHADOW EFFECT prevailing onshore winds Los Angeles * Mojave Desert San Joaquin Valley S...
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