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Deserts
Defining NA deserts
4
Biology
Undergraduate 4
03/19/2012
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Term
Defining a Desert
 Definition

Desert=250mm precipitation or less

Semi-Arid=500mm precipitation or less
Term
Evapotranspiration
 Definition

evapotranspiration (ET)=evaporation (soil) + transpiration (plants)

 

Potential ET (PET)=amount of water lost from a wet surface

 

If PPT<PET (input<output) then the region will be arid
Term

 

Creation of deserts

 Definition
  • Trade-Wind Deserts-30N/S; relationship to PV=nRT
  • Continental Deserts (Midlatitude Deserts)-Interior of a continent/far from the ocean
  • Rain-Shadow Deserts
  • Coastal Deserts
Term

 

North American Sections (Provinces)

 Definition
  • Great Basin Section
  • Sonoran Section
  • Mexican Highland Section
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