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<DIV><FONT face=Arial size=2>Many thanks to all. I have realized my
error. I was ordering and using the wrong variables in my GRIB
files. I was using the pressfc variable instead of
prmsl. Mark</FONT></DIV>
<DIV> </DIV>
<DIV>----- Original Message ----- </DIV>
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style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=smcmillan@PLANALYTICS.COM
href="mailto:smcmillan@PLANALYTICS.COM">Stephen McMillan</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=GRADSUSR@LIST.CINECA.IT
href="mailto:GRADSUSR@LIST.CINECA.IT">GRADSUSR@LIST.CINECA.IT</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, March 11, 2010 1:38
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Correcting Surface Pressure
to Sea Level</DIV>
<DIV><BR></DIV>Mark,
<DIV>Have you tried plotting the "prmslmsl" (or similar name) variable?
It sounds like your trying to plot "pressfc" (or similar name).
Perhaps your file only has the one for surface pressure?</DIV>
<DIV>Stephen Mc<BR><BR>
<DIV class=gmail_quote>On Thu, Mar 11, 2010 at 3:16 PM, Mark Hess <SPAN
dir=ltr><<A href="mailto:mhess@oceani.com">mhess@oceani.com</A>></SPAN>
wrote:<BR>
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<DIV><FONT face=Arial size=2>I tried to access the GrADS User archives for
this answer, but the page would not allow me to search.Perhaps someone can
point me in the right direction. When plotting surface pressure
(isobars) from the GFS GRIB files, my data show very low pressure
values over land. While not sure, I am guessing this is because the
data need to be corrected to sea level. Is this correct? If so, can
someone provide a resource which explains how to 'correct' the data? If I am
incorrect, Can you please explain what I am doing wrong?
Thanks.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Mark</FONT></DIV>
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