What is a DESERT ?. Total Rainfall 2.5 mm Wadi Halfa, Sudan(21 o N, 31 o E ) Rainfall mm Temp o C.

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Presentation transcript:

What is a DESERT ?

Total Rainfall 2.5 mm Wadi Halfa, Sudan(21 o N, 31 o E ) Rainfall mm Temp o C

An area with dry climate, sometimes defined as having a total annual rainfall of less than mm Dry regions with very little vegetation

Characteristics of deserts: 1. Absence / sparse vegetation 2. Very low and variable rainfall 3. Low humidity 4. High evaporation rate 5. Clear Skies 6. Large daily range of temperature

Clear sky with little or no cloud cover enables maximum insolation input Air temperature o C Absence of vegetation cover

Maximum outgoing outgoing radiation radiation Clear sky with no cloud cover Air temperature o C

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