[ncl-talk] NCL function wrf_user_getvar

[Israt Jahan]

Hello,
It would be much appreciated if someone could shed some light on this. Does
wrf_user_getvar(NCDF_File,"z",0) measure z from ground level or sea level?
I need to find temperature at 1000 m above ground level. I am doing the
following:
1. ht=wrf_user_getvar(NCDF_File,"z",0) ;
where NCDF_File is a list of WRF netCDF files
2. tk=wrf_user_getvar(NCDF_File,"tk",0)  ;get temperature in K
2. temp_1km=wrf_user_interp_level(tk,ht,1000,0) ;
get temperature at 1 km above ground level
Is my approach correct?
Best,
Israt


On Tue, Nov 16, 2021 at 4:26 PM Israt Jahan <israt.jahan at uconn.edu> wrote:

> Dear NCL users,
> I have a question about the NCL function "wrf_user_getvar". I see this
> function can extract data from  WRF files and calculate the requested
> diagnostic. One of the available diagnostics is "z/height" which is labeled
> as the "full model height in m" in this site wrf_user_getvar (ucar.edu)
> <https://www.ncl.ucar.edu/Document/Functions/WRF_arw/wrf_user_getvar.shtml>.
> From WRF output files, I need to find temperature at 1000 m above ground
> level. I am doing the following:
> 1. ht=wrf_user_getvar(NCDF_File,"z",0) where NCDF_File is a list of WRF
> netCDF files
> 2. tk=wrf_user_getvar(NCDF_File,"tk",0)  to get temperature in K
> 2. temp_1km=wrf_user_interp_level(tk,ht,1000,0) to get temperature at 1 km
>
> My question is: is the diagnostic "z/height" that we get from
> "wrf_user_getvar" measured from ground level or sea level?
> If it is measured from sea level, what should I do to get z from ground
> level?
>
> Thank you so much.
> Best,
> Israt
>
>
> --
> Regards,
> Israt Jahan
> Graduate Assistant
> Department of Civil and Environmental Engineering
> School of Engineering | University of Connecticut
> Email: israt.jahan at uconn.edu
>
-- 
Regards,
Israt Jahan
Graduate Assistant
Department of Civil and Environmental Engineering
School of Engineering | University of Connecticut
Email: israt.jahan at uconn.edu
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.ucar.edu/pipermail/ncl-talk/attachments/20211125/a7f2ce89/attachment.html>