Re: Possible bug in wrf_td fuction

Hi Michael,

This question is more appropriate for wrfhelp. I've CC'ed them on this message.

--Mary

On May 26, 2011, at 1:02 PM, Michael J Murphy wrote:

> The Problem:
> I have been using the wrf_usr_getvar function to calculated and plot dew point temperature from WRF-ARW output (and input) files. When plotting the dew point temp in vertical profiles I have found strange behavior in the upper atmosphere (near 100 mb). This strange behavior includes the same value of dew point temp (approx -80 degrees Celsius) at numerous sigma levels. The relative humidity extracted with the wrf_usr_getvar function does not show the supersaturations implied by these strange dew point temp reading in the upper atmosphere.
>
> Error Messages:
> There is no error message associated with this problem.
>
> My Thoughts:
> The wrf_usr_getvar seems to call the wrf_td function for its dew point temperature calculation. I have been unable to locate the source code for this wrf_td function but suspect this is the source of the strange dew point temp values.
>
> Background Info:
> 1) Name of WRF data file: wrfinput_d01--bug-wrf_td.gz (NOTE: I am giving the wrfinput file because it is smaller and has the same issue as the wrfout file)
> 2) Name of NCL scripts: plot-dewpt--bug-wrf_td.ncl & plot-rh--bug-wrf_td.ncl
> 3) NCL version: 5.2.1
> 4) uname -a: Linux fe-inform 2.6.18-194.32.1.el5 #1 SMP Wed Jan 5 17:52:25 EST 2011 x86_64 x86_64 x86_64 GNU/Linux
>
>
> MJ
>
>
>
>
>
> _______________________________________________
> ncl-talk mailing list
> List instructions, subscriber options, unsubscribe:
> http://mailman.ucar.edu/mailman/listinfo/ncl-talk

_______________________________________________
ncl-talk mailing list
List instructions, subscriber options, unsubscribe:
http://mailman.ucar.edu/mailman/listinfo/ncl-talk
Received on Thu May 26 14:03:19 2011