[ncl-talk] Regarding the calculation of heights
Prashanth Bhalachandran
prashanth.bhalachandran at gmail.com
Sat Nov 9 11:07:38 MST 2019
Dear NCL'ers,
As we know WRF's outputs are originally in Eta coordinates. I am trying to
understand the logic of how the height (z) is calculated in NCL's
wrfusergetvar function.
z = *wrf_user_getvar*
<https://www.ncl.ucar.edu/Document/Functions/WRF_arw/wrf_user_getvar.shtml>(a,
"z",time) ; grid point height
I expect that the height at each eta level should change as a function
of x,y, and time.
Can someone tell me how the above function calculates this z? Is there
an hydrostatic assumption? In other words, is the z
just geopotential height? Or is it the actual height itself?
Thank you,
Prashanth
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