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<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="155394816-28022013">Arlindo,
</span></font></div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="155394816-28022013">this may be messy and I have not tried it.</span></font></div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="155394816-28022013">But:</span></font></div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="155394816-28022013"></span></font> </div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="155394816-28022013">If you take some of the global climate data sets,</span></font></div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="155394816-28022013"></span></font> </div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="155394816-28022013">interpolate your local model grid up to the (coarser) scale (resolution) of the climate data set</span></font></div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="155394816-28022013"></span></font> </div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="155394816-28022013">cut out the area of interest from the climate data
</span></font></div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="155394816-28022013"></span></font> </div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="155394816-28022013">replace with your regional model output (coarse)</span></font></div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="155394816-28022013"></span></font> </div>
<div dir="ltr" align="left"><font color="#0000ff" size="2" face="Arial"><span class="155394816-28022013">then run fish.</span></font></div>
<div><font color="#0000ff" size="2" face="Arial"></font> </div>
<div><span class="155394816-28022013"><font color="#0000ff" size="2" face="Arial">Comments? Anyone?</font></span></div>
<div><span class="155394816-28022013"><font color="#0000ff" size="2" face="Arial"></font></span> </div>
<div><span class="155394816-28022013"><font color="#0000ff" size="2" face="Arial">Cheers,</font></span></div>
<div><span class="155394816-28022013"><font color="#0000ff" size="2" face="Arial">Bernd.</font></span></div>
<div><span class="155394816-28022013"><font color="#0000ff" size="2" face="Arial"></font></span> </div>
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<p><font size="2">--<br>
Bernd Becker Climate Impacts Product Development<br>
Met Office Hadley Centre FitzRoy Road Exeter Devon EX1 3PB United Kingdom<br>
Tel.: +44 (0) 1392 884511 Fax: +44 (0)870 900 5050<br>
E-mail:bernd.becker@metoffice.gov.uk - <a href="http://www.metoffice.gov.uk/research/people/bernd-becker">
http://www.metoffice.gov.uk/research/people/bernd-becker</a><br>
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<font size="2" face="Tahoma"><b>From:</b> gradsusr-bounces@gradsusr.org [mailto:gradsusr-bounces@gradsusr.org]
<b>On Behalf Of </b>Arlindo Meque<br>
<b>Sent:</b> 28 February 2013 16:03<br>
<b>To:</b> Teddy Allen<br>
<b>Cc:</b> gradsusers<br>
<b>Subject:</b> Re: [gradsusr] How to calculate the velocity potential for a local domain ?<br>
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Thank you very much for the links.<br>
Indeed, it does not answer my question: I've my own data (wind fields ) generated by a Regional Climate Model.<br>
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Help is needed.<br>
<br>
Arlindo <br>
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<b><span style="FONT-WEIGHT: bold">De:</span></b> Teddy Allen <teddyallen@yahoo.com><br>
<b><span style="FONT-WEIGHT: bold">Para:</span></b> Arlindo Meque <mequitomz@yahoo.com.br>; gradsusers <gradsusr@gradsusr.org>; GrADS Users Forum <gradsusr@gradsusr.org>
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<b><span style="FONT-WEIGHT: bold">Enviadas:</span></b> Quinta-feira, 28 de Fevereiro de 2013 17:41<br>
<b><span style="FONT-WEIGHT: bold">Assunto:</span></b> Re: [gradsusr] How to calculate the velocity potential for a local domain ?<br>
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<div><span>One option is to simply download vp data in a grads netcdf format from here:</span></div>
<div><span><a href="http://iridl.ldeo.columbia.edu/SOURCES/.NOAA/.NCEP-NCAR/.CDAS-1/.DAILY/.Intrinsic/.PressureLevel/.vpot/" rel="nofollow" target="_blank">http://iridl.ldeo.columbia.edu/SOURCES/.NOAA/.NCEP-NCAR/.CDAS-1/.DAILY/.Intrinsic/.PressureLevel/.vpot/</a></span></div>
<div><span></span> </div>
<div><span>or in monthly format:</span></div>
<div><span><a href="http://iridl.ldeo.columbia.edu/SOURCES/.NOAA/.NCEP-NCAR/.CDAS-1/.MONTHLY/.Intrinsic/.PressureLevel/" rel="nofollow" target="_blank">http://iridl.ldeo.columbia.edu/SOURCES/.NOAA/.NCEP-NCAR/.CDAS-1/.MONTHLY/.Intrinsic/.PressureLevel/</a></span></div>
<div><span></span> </div>
<div><span>You can subset and select various times and regions for your needs through this site as well. This does not necessarily answer your question of how to accomplish this calculation in GrADS, but at least you will now have access to it and can use it
in GrADS. </span></div>
<div><span></span> </div>
<div><span>good luck,</span></div>
<div><span>teddy </span></div>
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<div><a href="http://www.teddyallen.com/" rel="nofollow" target="_blank">http://www.teddyallen.com/</a></div>
<div>"To move quickly, go alone. To move far, go <font color="#ff0000"><i><b>together</b></i></font>."
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<div>African Proverb</div>
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<b><span style="FONT-WEIGHT: bold">From:</span></b> Arlindo Meque <mequitomz@yahoo.com.br><br>
<b><span style="FONT-WEIGHT: bold">To:</span></b> gradsusers <gradsusr@gradsusr.org>
<br>
<b><span style="FONT-WEIGHT: bold">Sent:</span></b> Thursday, February 28, 2013 4:13 AM<br>
<b><span style="FONT-WEIGHT: bold">Subject:</span></b> [gradsusr] How to calculate the velocity potential for a local domain ?<br>
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<div style="MARGIN-BOTTOM: 0cm">Dear all,</div>
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<div style="MARGIN-BOTTOM: 0cm">I have wind fields covering only the African domain and I want to calculate the velocity potential.</div>
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<div style="MARGIN-BOTTOM: 0cm">To my knowledge, the classical “fish” algorithm under the opengrads version works for a global domain.
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<div style="MARGIN-BOTTOM: 0cm">Any suggestion?</div>
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<div style="MARGIN-BOTTOM: 0cm">Arlindo </div>
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