I know that actual evapotranspiration, potential evaporation, and potential evapotranspiration are often distinguised in the literature, so I also wanted to confirm what
the potential evaporation rate in this dataset represents.
I am interested in learning more about
the potential evaporation rate (W / m2) in the NCEP / NCAR Reanalysis dataset (Kalnay et al., 1996)- Does anyone have familiarity with this particular variable and / or know how it was derived?
Deserts are arid regions, generally receiving less than 25 centimeters (10 inches) of precipitation a year, or regions where
the potential evaporation rate is significantly greater than the precipitation.
Not exact matches
There are some various proposed mechanisms to explain this that involve the surface energy balance (e.g., less coupling between the ground temperature and lower air temperature over land because of less
potential for
evaporation), and also lapse
rate differences over ocean and land (see Joshi et al 2008, Climate Dynamics), as well as vegetation or cloud changes.
The amount of
potential energy released per unit of time is dependent both on the
rate of the initial
evaporation AND the
rate of condensation and the net outturn will influence the winds via the pressure gradient and thus the dynamic power of the circulation.