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<font face="Arial Narrow">Hello<br>
<br>
I have some questions abous the use of MET with the version ARW of WRF.<br>
First, as explained in the tutorial, i have used WPP to transform
nectdf output in grib.<br>
But, if the first files (first time of the simulation) was tranformed
in grib without problem, it was not the case for other files (other
times).<br>
So, i have decided to use the possibility of WRF/ARW to create as
output grib files directly.<br>
When i want to use the capability of MET to deal with UPA data, i meet
some problems.<br>
First, in grib file obtained directly from WRF/ARW, levels are defined
as ETA levels and not pressure levels.<br>
- How can i read eta levels with MET? Is it possible?<br>
- TMP can be extract at different level using LNNN or RNNN. Are L and
R linked to eta levels. For example, L1.2 doesn't run while L2.5 runs.<br>
- This remark is linked to the previous. Temperature is an output
variable of WRF only for 2m level. WRF provides potentiel temperature
at the different vertical levels and not TMP.<br>
Is MET able to compute temperature from the different variable of
WRF (potential temperature and pressure)? If not what is TMP/L2.5<br>
if i put POT as a variable name in the PointStat config file, MET
<br>
<br>
I have checked the only grib file coming from WPP and this last one
contains TMP at different vertical pressure levels. So WPP seems to
compute temperature from potential temperature.<br>
Do you think it's better to use WPP. If yes, how can i solve my problem
with WPP.<br>
Thank you in advance for your answer.<br>
<br>
Julien <br>
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<th rowspan="4" align="left" valign="middle" width="90"><a
href="http://www.numtech.fr" hreflang="fr" alt="NUMTECH"><img
src="cid:part1.00080308.08080501@numtech.fr" alt="NUMTECH" border="0"></a></th>
<td align="left" valign="top" width="300">Julien PERGAUD<br>
Ingénieur d'études et de recherche / SO</td>
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<td align="left" valign="top" width="300">6, allée Alan Turing -
BP 30242 - Parc Technologique de la Pardieu<br>
63175 AUBIERE Cedex - FRANCE<br>
Tél: 33 (0)4 73.28.75.95 - Fax: 33 (0)4.73.28.75.99<br>
Web: <a href="http://www.numtech.fr">http://www.numtech.fr</a></td>
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