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Deserts and dryland 05.12.18 (Rivers in the desert (Rainfall extremely…
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definition
climate aridity index
the more negative the more arid the area is.
balance of water coming into and being lost in the system is negative.
P/ETP
P= precipitation. ETP= potential evapotranspiration, taking into account atmospheric humidity, solar radiation and wind.
Less than 250mm of rain per year, hot or cold.
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link to water balance (aridity index). relationship between precipitation and evapotranspiration- heat- evaporating, plants transpiration.
