20050324: Gempak - Obtaining SST data from eta-212 grids ???

Kevin,

Water Temperature in the ETA GRIB data is WTMPK.
You can find out all the grids you have in your data set with
GDINFO and using "restore defaults/gdinfo" at the gdinfo prompt
(which sets time, level coordinate and parameter to "all").
The difinitions of the GEMPAK parameter names are found in the
$GEMTBL/grid/wmogribX.tbl and ncepgribX.tbl files.

As a reference, you may find the NCEP inventory of grids within
the ETA 212 useful:
http://www.nco.ncep.noaa.gov/pmb/products/nam/nam.t12z.awip3d12.tm00.shtml
I accessed this from:
http://www.emc.ncep.noaa.gov/mmb/namgrids/
The parameter and coordinate name/definitions may be different than the GEMPAK 
convention, but useful non the less. For example, #544 in the list
above shows that the model has the surface water temperature grid.

Steve Chiswell
Unidata User Support


>From: "Kevin Doty" <address@hidden>
>Organization: UCAR/Unidata
>Keywords: 200503241608.j2OG8X8k012197

>Institution: University of Alabama at Huntsville
>Package Version: 5.7.1
>Operating System: Linux
>Hardware Information: i386 Linux cluster
>Inquiry: Dear Colleague:
>
>I had a question yesterday concerning a land mask and the eta-212 data - I was
>  able to accomplish that with your help - thanks.  This is a related question
> .  Does SST data exist in the original eta (nam) 212 grib data?  As far as I 
> can tell from the "gdinfo" command I do not have anything like SSTs in the ge
> mpak files.  The soil temperature data is there but again those values are al
> l near-freezing over all ocean areas.  
>
>If SSTs exist in the original grib data, what does one need to do  to extract 
> it?  A colleague of mine who is the main computer administrator set up the LD
> M feed as below to convert the eta-212 data to gempak files using dcgrib2.
>
>HDS|CONDUIT     (/mNAM|MT.nam)^M
>        PIPE    decoders/dcgrib2 -d data/gempak/logs/dcgrib2_NAM.log^M
>                -e GEMTBL=gempak/tables ^M
>
>Any help you could give would be much appreciated.
>
>Thanks,
>Kevin Doty
>
>
>
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