<br><br><div class="gmail_quote">On Tue, Jan 26, 2010 at 9:40 AM, Gisele Zepka <span dir="ltr"><<a href="mailto:gzepka@dge.inpe.br">gzepka@dge.inpe.br</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Dear all,<br>
<br>
I am interested to analyse the atmospheric instability when a storm occurrs using equivalent potential temperature from mesoscale model. What atmospheric level do I need to check to get an idea of instability? I don't have a theta_e output, so I will calculate it from temperature and humidity data from model.<br>
<br>
Please, any help will be nice.<br>
<br></blockquote><div><br></div><div><br></div><div>The OpenGrADS bundle includes the <span class="Apple-style-span" style="font-family: 'bitstream vera sans', verdana, sans-serf; "><i>Saakeskus - Collection of Thunderstorm Related Functions, </i>in particular:</span></div>
<div><font class="Apple-style-span" face="'bitstream vera sans', verdana, sans-serf" size="5"><span class="Apple-style-span" style="font-size: 17px;"><b><span class="Apple-style-span" style="font-size: 14px; font-weight: normal; "><dd>
<p>display <strong>dewpt</strong>(<em>T,RH</em>) - Dew-point Temperature</p></dd><dt></dt><dd><p>display <strong>ept</strong>(<em>T,RH,P</em>) - Equivalent potential temperature</p></dd><dt></dt><dd><p>display <strong>epi</strong>(<em>T850,RH850,T500,RH500</em>) - Potential Instability</p>
</dd><dt></dt><dd><p>display <strong>plcl</strong>(<em>T2M,RH2M,PS</em>) - Pressure at LCL</p></dd><dt></dt><dd><p>display <strong>shear</strong>(<em>U1,V1,U2,V2</em>) - Wind Shear</p></dd><dt></dt><dd><p>display <strong>srh1km</strong>(<em>uVAR,vVAR</em>) - Storm-relative Helicity 0-1km</p>
</dd><dt></dt><dd><p>display <strong>srh3km</strong>(<em>uVAR,vVAR</em>) - Storm-relative Helicity 0-3km</p></dd><dt></dt><dd><p>display <strong>tlcl</strong>(<em>T2M,RH2M</em>) - Temperature at LCL</p></dd><dt></dt><dd><p>
display <strong>tsindex</strong>(<em>CAPE180_0mb,CIN180_0mb</em>) - Likelihood of T-storm Initiation</p></dd><dt></dt><dd><p>display <strong>ttindex</strong>(<em>T500,T850,RH850</em>) - Total Totals Index</p></dd><dt></dt>
<dd><p>display <strong>wchill</strong>(<em>T2M,U10M,V10M</em>) - Wind Chill Index (New)</p></dd></span></b></span></font></div><div>More information here:</div><div><br></div><div> <a href="http://opengrads.org/doc/udxt/saakeskus/">http://opengrads.org/doc/udxt/saakeskus/</a></div>
<div><br></div><div>You can download the OpenGrADS bundle from here:</div><div><br></div><div> <a href="http://opengrads.org/wiki/index.php?title=Installing_the_OpenGrADS_Bundle">http://opengrads.org/wiki/index.php?title=Installing_the_OpenGrADS_Bundle</a></div>
<div><br></div><div> Good Luck,</div><div><br></div><div> Arlindo</div><div><br></div></div>-- <br>Arlindo da Silva<br><a href="mailto:dasilva@alum.mit.edu">dasilva@alum.mit.edu</a><br>