On Mon, Oct 12, 2009 at 11:24 PM, Santanello, Joseph A. (GSFC-6143) <span dir="ltr"><<a href="mailto:joseph.a.santanello@nasa.gov">joseph.a.santanello@nasa.gov</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
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<p class="MsoNormal"><span style="color:#1F497D">Hi Arlindo,</span></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="color:#1F497D">I am working with a group at
NASA-GSFC and we are considering using the new MERRA data as input
(initial/boundary conditions) to the WRF-ARW model. WRF-help said that if
MERRA was in HDF-4 format then we need to convert it first to GRIB
(intermediate format for metgrid/WPS). I came across your page relating to
MERRA conversion:</span></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="color:#1F497D"><a href="http://cookbooks.opengrads.org/index.php?title=Recipe-017:_Subsetting_and_reformating_MERRA_data_with_Lats4d#Simple_reformatting_to_GRIB-1" target="_blank">http://cookbooks.opengrads.org/index.php?title=Recipe-017:_Subsetting_and_reformating_MERRA_data_with_Lats4d#Simple_reformatting_to_GRIB-1</a></span></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span></p>
<p class="MsoNormal"><span style="color:#1F497D">I was wondering if you had any experience
with WRF/WPS or any suggestions on how to proceed in getting MERRA converted for
this purpose? To date I have only used NARR, GFS, and ECMWF data to drive WRF
which are more common. Thanks!</span></p>
<p class="MsoNormal"><span style="color:#1F497D"> </span></p></div></div></blockquote><div>As mentioned in that Recipe you can use LATS4d to convert the MERRA files to GRIB-1. However, you may need to construct a LATS parameter table to make sure the GRIB-1 dataset follows the NCEP conventions; see the lats4d documentation refered to i the Recipe. (By default LATS4d creates a generic GRIB-1 file which does not conform to NCEP or ECMWF conventions.) I have no experience with WRF whatsoever. However, if you find a solution consider writing a Recipe for it, I am sure other people would appreciate it.</div>
<div><br></div><div>(Please send questions like this to the gradsusr list instead of my personal e-mail address, I cannot afford the time to answer individual questions. For MERRA related questions, follow the link on the MERRA website: <a href="http://gmao.gsfc.nasa.gov/research/merra/intro.php">http://gmao.gsfc.nasa.gov/research/merra/intro.php</a>)</div>
<div><br></div><div> Arlndo</div><div><br></div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div lang="EN-US" link="blue" vlink="purple"><div>
<p class="MsoNormal"><span style="color:#1F497D">Joe</span></p>
<p class="MsoNormal"><span style="color:#1F497D">--</span></p>
<p class="MsoNormal"><span style="color:#1F497D">--------------------------------------------------------------------------</span></p>
<p class="MsoNormal"><span style="color:#1F497D">Dr. Joseph A. Santanello, Jr.</span></p>
<p class="MsoNormal"><span style="color:#1F497D">Physical Scientist</span></p>
<p class="MsoNormal"><span style="color:#1F497D">Hydrospheric and Biospheric
Sciences Laboratory</span></p>
<p class="MsoNormal"><span style="color:#1F497D">NASA-GSFC Code 614.3, Bldg
22, Room 008</span></p>
<p class="MsoNormal"><span style="color:#1F497D">Greenbelt, Maryland 20771</span></p>
<p class="MsoNormal"><span style="color:#1F497D">Phone: 301/286-7450 Fax:
301/286-8624</span></p>
<p class="MsoNormal"><span style="color:#1F497D">Email: <a href="mailto:Joseph.A.Santanello@nasa.gov" target="_blank"><span style="color:#1F497D">Joseph.A.Santanello@nasa.gov</span></a></span></p>
<p class="MsoNormal"><span style="color:#1F497D">---------------------------------------------------------------------------</span></p>
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</blockquote></div><br><br clear="all"><br>-- <br>Arlindo da Silva<br><a href="mailto:dasilva@alum.mit.edu">dasilva@alum.mit.edu</a><br>