[Wrf-users] Which QVAPOR values correspond to which Total Geopotential Height?

Erik Carlsten ecarlste at gmail.com
Fri Sep 2 14:02:26 MDT 2011

Hi All,

This is my first time using this mailing list so hopefully I give you the
information you need to answer the question I have, providing you have the
time to help.

Currently I am running WRF and producing output just fine. The variables I
am primarily interested in looking at right now are PH, PHB, and QVAPOR. I
might also need Q2, but I am unsure yet due to my lack of overall
understanding of the correlation between the staggered grid for elevation (
( PH + PHB ) / 9.81 ) and the non-staggered grid of QVAPOR.

What I am trying to figure out is what the water vapor mixing ratio is at a
given elevation. I am pulling the data straight out of the NetCDF files
using C and Matlab, so I won't be using NCL at all for this.

Can anyone explain with some detail on how I would determine which vertical
layer of QVAPOR correlates to which vertical layer of "total geopotential
height in meters"?

Thanks very much for your time,

Erik S. Carlsten              Cell: (406) 570-1547
EPS 116                        Lab: (406) 994-6145
Montana State University
Bozeman, MT 59717

There is a single light of science, and to
brighten it anywhere is to brighten it
          - Isaac Asimov
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