Re: [gembud] creating ERA5-based moisture maps

  • To: gembud@xxxxxxxxxxxxxxxx
  • Subject: Re: [gembud] creating ERA5-based moisture maps
  • From: Steve Decker <sgdecker@xxxxxxxxxxxxxxxxxx>
  • Date: Fri, 25 Feb 2022 14:44:27 -0500
  • Arc-authentication-results: i=1; 1; spf=pass; dmarc=pass action=none; dkim=pass; arc=none
  • Arc-message-signature: i=1; a=rsa-sha256; c=relaxed/relaxed;; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=8ObHXGcW9z4oN37PCQMbCt8yPS3VDQbDpoNHq3kMHAo=; b=PPxaKAx2MYSzL1xlUkLukabt1QQ+7lK7Q829C2tb6EWpfwPFJgpu8fSGbwABPYL5ARaoSJSu4CkngvqueuEA9ZZjuSvmMKltjSBMrk46vZKBOfk8dzi1glRnRbRKHBPSxueKKnDnyfMeYtog0j3FSgz3jLAJC5uic9Gx70AleaJIgv4W1vKIsNWrch5R13Spll8ONX4HnEMgDer2RBFGNuFiBHY+cT500ITp+IvbU3JTSIR183EM/YSaCU3Ri6+T3a+5A+xnVOv4UFBaAq70iXrNMEOwOIZVC5gZrx2t+QxByyLibtcYS+tNGH6CBxngf0OyGfjhNY2NfYI/zHB7QA==
  • Arc-seal: i=1; a=rsa-sha256; s=arcselector9901;; cv=none; b=aTGRwCAvJgCNPqksIagbNvQxHqy1iJtlqyXiCw47Nh4Y8NtrzhQTwy7gyqn7eBo/lP41V52c1v6OUnD76MfldK2UosHmqch27o/IrdgmHgiRjn5TTg/5LgP5gkzW8qda586gzFh39cr2O8MpZwhMi5aHISS3exNOb0NagechzJwF7LoCuJI68DA/+tw9aY+r0aXRG0zs4bJFeg3IYFvAJOgLs0Rli+eE0d4+K7C2r+rc2m3WEOPDPfrUt86UCBNXpPqp5BQfk2pKcjKtGb6RcyjJfLIWzl3iOWa7G5FKU1PV2Kj95rgAOzxeMzvuCkL/qWtrMh/BJwtMg67akJeQRg==
  • Authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none;

These settings work with real-time data and might be adaptable to your scenario:
 GDATTIM  = f12
 GLEVEL   = 950
 GVCORD   = pres
 GFUNC    = thte(pres,tmpc,dwpc+2)
 GDFILE   = $MODEL/nam/22022512_nam212.gem+$MODEL/gfs/22022512_gfs211.gem


On 2/25/22 2:19 PM, Douglas Miller wrote:

      Dear GEMPAK users,

          I'm interested in creating maps of equivalent potential temperature (THTE) using ERA5 files (from the NCAR archive) in which fields on a given day are archived in separate grib files. I'm running into a roadblock after creating separate GEMPAK format files of each field and then can't figure out how to get GEMPAK to recognize TMPK from one file and RELH from another to calculate THTE on the fly. Is the only solution to merge separate ERA5 grib files/fields into a single "mega" GEMPAK file?

        Thank you, in advance, for any suggestions you might have on avoiding the "mega" file!


Douglas K. Miller
Atmospheric Sciences Dept.
One University Heights
Asheville, NC 28804
Phone: (828) 232-5158
FAX: (828) 232-5046

NOTE: All exchanges posted to Unidata maintained email lists are
recorded in the Unidata inquiry tracking system and made publicly
available through the web.  Users who post to any of the lists we
maintain are reminded to remove any personal information that they
do not want to be made public.

gembud mailing list
For list information or to unsubscribe, visit:

Steve Decker, Associate Teaching Professor
Director, Meteorology Undergraduate Program
Department of Environmental Sciences           Phone: (848) 932-5750
Rutgers University                               Fax: (732) 932-8644
14 College Farm Rd                  Email:decker@xxxxxxxxxxxxxxxxxx
New Brunswick, NJ  08901-8551
  • 2022 messages navigation, sorted by:
    1. Thread
    2. Subject
    3. Author
    4. Date
    5. ↑ Table Of Contents
  • Search the gembud archives: