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[GEMPAK #YKC-319899]: RH wrt ice

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  • Subject: [GEMPAK #YKC-319899]: RH wrt ice
  • Date: Mon, 29 Jan 2007 11:24:56 -0700
>
> Excellent! When do you expect v5.10.1 will be available?
> Dave

Soon! Just got back from the AMS last week, so have some housekeeping to
handle to get the release out.

Steve Chiswell
Unidata User Support





> 
> OK. I put in a GFUNC=RELI(tmpc,dwpc) function using Goff-Gratch (WMO No-49, 
> 2000) into the
> 5.10.1 release. I tested for consistency versus values produced at:
> <a class="moz-txt-link-freetext" 
> href="http://hurri.kean.edu/~yoh/calculations/satvap/satvap.html";>http://hurri.kean.edu/~yoh/calculations/satvap/satvap.html</a>
> 
> Steve
> 
> Steve Chiswell
> Unidata User Support
> 
> 
> </pre>
> <blockquote type="cite">
> <pre wrap="">----- Original Message -----
> From: Unidata GEMPAK Support <a class="moz-txt-link-rfc2396E" 
> href="mailto:address@hidden";>&lt;address@hidden&gt;</a>
> Date: Tuesday, January 23, 2007 5:46 pm
> Subject: [GEMPAK #YKC-319899]: RH wrt ice
> 
> </pre>
> <blockquote type="cite">
> <pre wrap="">That would be creating a function in the $GEMPAK/source/gemlib/df
> directory(called by the dg/dgdriv.c routine).
> 
> Steve
> 
> 
> 
> </pre>
> <blockquote type="cite">
> <pre wrap="">&lt;!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 
> Transitional//EN"&gt;
> &lt;html&gt;
> &lt;head&gt;
> &lt;meta content="text/html;charset=UTF-8" http-equiv="Content-Type"&gt;
> &lt;/head&gt;
> &lt;body bgcolor="#ffffff" text="#000000"&gt;
> Hi Steve,&lt;br&gt;
> What is a gemlib/df project?&lt;br&gt;
> Dave&lt;br&gt;
> &lt;br&gt;
> Unidata GEMPAK Support wrote:
> &lt;blockquote cite=<a class="moz-txt-link-rfc2396E" 
> href="mailto:address@hidden";>"address@hidden"</a>
> </pre>
> </blockquote>
> <pre wrap="">type="cite"&gt;&gt; &lt;blockquote type="cite"&gt;
> </pre>
> <blockquote type="cite">
> <pre wrap="">&lt;pre wrap=""&gt;Hello,
> 
> Not sure if this is the right place for this request, but I think
> </pre>
> </blockquote>
> <pre wrap="">the addition of a relative humidity with respect to ice function 
> in
> gfunc would be welcomed by the GEMPAK community.  I know I would
> find it useful.
> </pre>
> <blockquote type="cite">
> <pre wrap="">Dave
> 
> 
> &lt;/pre&gt;
> &lt;/blockquote&gt;
> &lt;pre wrap=""&gt;&lt;!----&gt;
> 
> Dave,
> 
> There are a number of formulations of Goff-Gratch. The WMO2000
> </pre>
> </blockquote>
> <pre wrap="">version would seem to be the best
> </pre>
> <blockquote type="cite">
> <pre wrap="">starting point unless you are researching more recent work. The
> </pre>
> </blockquote>
> <pre wrap="">es(i) saturation vapor pressure
> </pre>
> <blockquote type="cite">
> <pre wrap="">with respect to ice is straight forward from temperature:
> ; WMO formulation, which is very similar to Goff Gratch
> ; Source : WMO technical regulations, WMO-NO 49, Vol I, General
> </pre>
> </blockquote>
> <pre wrap="">Meteorological Standards and Recommended Practices, Aug 2000, 
> App. A.
> </pre>
> <blockquote type="cite">
> <pre wrap="">T0    = 273.16       ; steam point temperature in K
> 
> Psat = 10.^(-9.09685 * (T0 / T - 1.) - 3.56654 * ALOG10(T0 / T) $
> + 0.87682 * (1. - T / T0) + 0.78614)
> 
> I can put it on the list unless you are interested in a gemlib/df
> </pre>
> </blockquote>
> <pre wrap="">project.&gt;
> </pre>
> <blockquote type="cite">
> <pre wrap="">Steve Chiswell
> Unidata User Support
> 
> Ticket Details
> ===================
> Ticket ID: YKC-319899
> Department: Support GEMPAK
> Priority: Normal
> Status: Closed
> 
> &lt;/pre&gt;
> &lt;/blockquote&gt;
> &lt;/body&gt;
> &lt;/html&gt;
> 
> 
> </pre>
> </blockquote>
> <pre wrap="">
> Ticket Details
> ===================
> Ticket ID: YKC-319899
> Department: Support GEMPAK
> Priority: Normal
> Status: Closed
> 
> 
> </pre>
> </blockquote>
> <pre wrap="">
> </pre>
> </blockquote>
> <pre wrap=""><!---->
> 
> Ticket Details
> ===================
> Ticket ID: YKC-319899
> Department: Support GEMPAK
> Priority: Normal
> Status: Closed
> 
> </pre>
> </blockquote>
> </body>
> </html>
> 
> 


Ticket Details
===================
Ticket ID: YKC-319899
Department: Support GEMPAK
Priority: Normal
Status: Closed