<table cellspacing="0" cellpadding="0" border="0" ><tr><td valign="top" style="font: inherit;"><DIV>Dear Jennifer,</DIV>
<DIV> </DIV>
<DIV> If possible, can I have a whole suite of your stated scripts ? I believe they can be of great help particularly to my analysis on remote-sensing data.</DIV>
<DIV> </DIV>
<DIV> Thank you and best regards.</DIV>
<DIV> </DIV>
<DIV>Ooi</DIV>
<DIV> </DIV>
<DIV><BR><BR>--- On <B>Sat, 5/1/13, Jennifer Adams <I><jma@cola.iges.org></I></B> wrote:<BR></DIV>
<BLOCKQUOTE style="BORDER-LEFT: rgb(16,16,255) 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px"><BR>From: Jennifer Adams <jma@cola.iges.org><BR>Subject: [gradsusr] CMIP5 and GrADS<BR>To: "GrADS Users Forum" <gradsusr@gradsusr.org><BR>Date: Saturday, 5 January, 2013, 8:00 AM<BR><BR>
<DIV id=yiv1466707693>
<DIV>Dear All,
<DIV>I will be giving a presentation at the AMS meeting next week on strategies I've used to download CMIP5 data. It's kind of a technical talk, maybe only of interest to a few members of this forum, but there is one slide that is relevant for GrADS (the text is below). I've done a bit of scripting to automatically generate descriptor files (for 'xdfopen' and 'open' when PDEF is necessary). The script parses the list of data files to determine the range of time steps for a particular variable and then generates the relevant CHSUB entries. It also does some other data-management checking to make sure the files cover a continuous, non-overlapping time span. Other functionality is listed below under the first bullet. I also have some code that will create PDEF files for non-rectilinear grids. ESMF's RegridWeightGen tool and a custom C program I wrote to translate the weights into a PDEF file make this a relatively easy job, allowing GrADS to handle a
lot of data that were previously inaccessible. Although these scripts were all written for CMIP5 data, they can be adapted for other data sets. At some point, I'd like to bring some of this code under the hood of GrADS, but that is still a bit far off… In any case, please let me know if you are interested in any of my scripts -- it seems a shame to spend so much time developing code for only one person to use.</DIV>
<DIV>--Jennifer</DIV>
<DIV><BR></DIV>
<DIV>
<DIV><FONT class=yiv1466707693Apple-style-span face=Courier><BR></FONT></DIV>
<DIV>
<DIV style="TEXT-ALIGN: left; MARGIN-TOP: 6.48pt; TEXT-INDENT: 0in; unicode-bidi: embed; DIRECTION: ltr; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0in"><FONT class=yiv1466707693Apple-style-span color=#010101 face="'Lucida Sans'">•Create GrADS descriptor files</FONT></DIV>
<DIV style="TEXT-ALIGN: left; MARGIN-TOP: 6.48pt; TEXT-INDENT: 0in; unicode-bidi: embed; DIRECTION: ltr; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0in"><SPAN style="FONT-FAMILY: 'Lucida Sans'; COLOR: rgb(1,1,1)" class=yiv1466707693Apple-style-span><SPAN style="WHITE-SPACE: pre" class=yiv1466707693Apple-tab-span></SPAN>Aggregate files over time dimension</SPAN></DIV>
<DIV style="TEXT-ALIGN: left; MARGIN-TOP: 5.76pt; TEXT-INDENT: 0in; unicode-bidi: embed; DIRECTION: ltr; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0.5in" class=yiv1466707693O1><FONT class=yiv1466707693Apple-style-span color=#010101 face="'Lucida Sans'">Make use of ensemble dimension when appropriate</FONT></DIV>
<DIV style="TEXT-ALIGN: left; MARGIN-TOP: 5.76pt; TEXT-INDENT: 0in; unicode-bidi: embed; DIRECTION: ltr; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0.5in" class=yiv1466707693O1><FONT class=yiv1466707693Apple-style-span color=#010101 face="'Lucida Sans'">Identify missing or overlapping time periods </FONT></DIV>
<DIV style="TEXT-ALIGN: left; MARGIN-TOP: 5.76pt; TEXT-INDENT: 0in; unicode-bidi: embed; DIRECTION: ltr; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0.5in" class=yiv1466707693O1><FONT class=yiv1466707693Apple-style-span color=#010101 face="'Lucida Sans'">Assign non-standard dimensions <BR><SPAN> </SPAN><SPAN> </SPAN>(e.g. basin averages or fixed fields)</FONT></DIV>
<DIV style="TEXT-ALIGN: left; MARGIN-TOP: 5.76pt; TEXT-INDENT: 0in; unicode-bidi: embed; DIRECTION: ltr; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0.5in" class=yiv1466707693O1><FONT class=yiv1466707693Apple-style-span color=#010101 face="'Lucida Sans'">Handle 365_day calendars</FONT></DIV>
<DIV style="TEXT-ALIGN: left; MARGIN-TOP: 6.48pt; TEXT-INDENT: 0in; unicode-bidi: embed; DIRECTION: ltr; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0in"><FONT class=yiv1466707693Apple-style-span color=#010101 face="'Lucida Sans'">• Create PDEF files for non-rectilinear grids </FONT></DIV>
<DIV style="TEXT-ALIGN: left; MARGIN-TOP: 5.76pt; TEXT-INDENT: 0in; unicode-bidi: embed; DIRECTION: ltr; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0.5in" class=yiv1466707693O1><FONT class=yiv1466707693Apple-style-span color=#010101 face="'Lucida Sans'">For ocean and sea ice realms</FONT></DIV>
<DIV style="TEXT-ALIGN: left; MARGIN-TOP: 5.76pt; TEXT-INDENT: 0in; unicode-bidi: embed; DIRECTION: ltr; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0.5in" class=yiv1466707693O1><FONT class=yiv1466707693Apple-style-span color=#010101 face="'Lucida Sans'">ESMF’s RegridWeightGen utility generates the<BR><SPAN> </SPAN>interpolation weights</FONT></DIV>
<DIV style="TEXT-ALIGN: left; MARGIN-TOP: 5.76pt; TEXT-INDENT: 0in; unicode-bidi: embed; DIRECTION: ltr; MARGIN-BOTTOM: 0pt; MARGIN-LEFT: 0.5in" class=yiv1466707693O1><FONT class=yiv1466707693Apple-style-span color=#010101 face="'Lucida Sans'">Vector fields must be rotated from grid-relative <BR><SPAN> </SPAN>to Earth-relative coordinates before interpolation</FONT></DIV></DIV>
<DIV><FONT class=yiv1466707693Apple-style-span color=#010101 face="'Lucida Sans'"><BR></FONT></DIV>
<DIV><BR>
<DIV><SPAN style="FONT-SIZE: 12px" class=yiv1466707693Apple-style-span><SPAN style="WIDOWS: 2; TEXT-TRANSFORM: none; TEXT-INDENT: 0px; BORDER-SPACING: 0px 0px; LETTER-SPACING: normal; BORDER-COLLAPSE: separate; FONT: 12px Helvetica; WHITE-SPACE: normal; ORPHANS: 2; COLOR: rgb(0,0,0); WORD-SPACING: 0px" class=yiv1466707693Apple-style-span>
<DIV>--</DIV>
<DIV>Jennifer M. Adams</DIV>
<DIV>IGES/COLA</DIV>
<DIV>4041 Powder Mill Road, Suite 302</DIV>
<DIV>Calverton, MD 20705</DIV>
<DIV><A href="http://aa.mc1609.mail.yahoo.com/mc/compose?to=jma@cola.iges.org" rel=nofollow target=_blank ymailto="mailto:jma@cola.iges.org">jma@cola.iges.org</A></DIV>
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