[gradsusr] Freezing Level

[Aykut Aykac]

Try this;

'sdfopen
http://nomads.ncep.noaa.gov:9090/dods/gfs_0p25/gfs20171104/gfs_0p25_06z'
'set gxout shaded'
'd hgttop0c'

This gives you freezing level in meters.

2017-11-04 19:37 GMT+03:00 Steve Young <shy9 at earthlink.net>:

> I am trying to use GrADS to determine the freezing level in meters (or
> feet).  I can use the following to determine the upper air surface where
> T=273.16 but am unable to figure out how to calculate/extract/determine
> HGT(LEV=H). This command gives an error of invalid expression. I welcome
> any suggestions.
>
>
>
> 'set gxout shaded'
>
> 'H=fndlvl(air, const(air, 273.16), Lev=1000, lev=400)'
>
> 'd H'
>
> 'run cbar'
>
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