Climate maps - evapotranspiration Climate Maps  
Evapotranspiration
Use the Selector below to get Australian maps showing mean areal actual, areal potential and point potential evapotranspiration.
 
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The evapotranspiration maps shown on this page are available as a hard-copy climate atlas or in a gridded electronic format.
Definition of evapotranspiration parameters Full explanation of Evapotranspiration Full text description
Areal actual ET is the ET that actually takes place, under the condition of existing water supply, from an area so large that the effects of any upwind boundary transitions are negligible and local variations are integrated to an areal average.
Areal potential ET is the ET that would take place, under the condition of unlimited water supply, from an area so large that the effects of any upwind boundary transitions are negligible and local variations are integrated to an areal average.
Point potential ET is the ET that would take place, under the condition of unlimited water supply, from an area so small that the local ET effects do not alter local airmass properties. It is assumed that latent and sensible heat transfers within the height of measurement are through convection only.