Deserts

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Deserts

  1. 1. Midlatitude deserts Rain shadow deserts Coastal deserts Monsoon deserts Polar deserts
  2. 2.  Midlatitude deserts - Midlatitude deserts occur between 30° and 50° N. and S., poleward of the subtropical highpressure zones. The Sonoran Desert of southwestern North America is a typical midlatitude desert.  RAIN SHADOW DESERT- Rain shadow deserts are formed because tall mountain ranges prevent moisture-rich clouds from reaching areas on the lee, or protected side, of the range. As air rises over the mountain, water is precipitated and the air loses its moisture content. A desert is formed in the leeside "shadow" of the range.
  3. 3.  COASTAL DESERTS -Coastal deserts generally are found on the western edges of continents near the Tropics of Cancer and Capricorn. They are affected by cold ocean currents that parallel the coast.  MONSOON DESERT - Monsoons develop in response to temperature variations between continents and oceans. The Rajasthan Desert of India and the Thar Desert of Pakistan are parts of a monsoon desert region west of the ranqe.
  4. 4. Xerophytes: Cardón cacti in the Baja California Desert, Cataviña region, Mexico The Camel Thorn Tree (Acacia erioloba) in the Namib Desert
  5. 5. The cream-colored courser,Cursorius cursor, is a well- camouflaged desert resident Tadpole shrimp survive dry periods as eggs, which rapidly hatch and develop after rain.
  6. 6. RAN K DESERT AREA (Km2) AREA (Mi2) 1 Antarctic Desert (Antarctica) 14,200,000 5,500,000 2 Arctic Desert (Arctic) 13,900,000 5,400,000 3 Sahara Desert (Africa) 9,100,000 3,500,000 4 Arabian Desert (Middle East) 2,600,000 1,000,000 5 Gobi Desert (Asia) 1,300,000 500,000 6 Patagonian Desert (South America) 670,000 260,000 7 Great Victoria Desert (Australia) 647,000 250,000 8 Kalahari Desert (Africa) 570,000 220,000 9 Great Basin Desert (North America) 490,000 190,000 10 Syrian Desert (Middle East) 490,000 190,000
  7. 7. Made by IDRAAK MOHD KHAN Of class VII- D

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