Physical causes of drought

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  • Physical causes of Drought
    • when regular weather patterns have been disturbed
      • above average presence of dry, high pressure systems
    • El Nino
      • brings desending air and high pressure
    • As Global temperatures increase...
      • more water is needed to grow crops
      • more water is lost through evaporation
    • The presence of  the ITCZ
      • this is a low pressure belt  which encircles the globe around the equator.
      • where trade winds from the northeast and southeast meet
      • the earth tilted orbit makes the zone migrate between the tropics
        • this causes dry and wet seasons in africa


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