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    Jennifer:<br>
    <br>
    I'm curious whether you will be distributing the processed model
    output via an OPeNDAP server?&nbsp; Or maybe someone knows of one
    already?&nbsp; Thanks,<br>
    <br>
    Jim<br>
    <br>
    <div class="moz-cite-prefix">On 1/4/13 2:00 PM, Jennifer Adams
      wrote:<br>
    </div>
    <blockquote
      cite="mid:974E60B2-F244-4505-A463-7BD96AEACE4B@cola.iges.org"
      type="cite">Dear All,&nbsp;
      <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.&nbsp;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&#8230; 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="Apple-style-span" face="Courier"><br>
          </font></div>
        <div>
          <!--StartFragment-->
          <div
            style="margin-top:6.48pt;margin-bottom:0pt;margin-left:0in;text-indent:
0in;text-align:left;direction:ltr;unicode-bidi:embed;mso-line-break-override:
            none;word-break:normal;punctuation-wrap:hanging"><font
              class="Apple-style-span" color="#010101" face="'Lucida
              Sans'">&#8226;Create GrADS
              descriptor files</font></div>
          <div
            style="margin-top:6.48pt;margin-bottom:0pt;margin-left:0in;text-indent:
0in;text-align:left;direction:ltr;unicode-bidi:embed;mso-line-break-override:
            none;word-break:normal;punctuation-wrap:hanging"><span
              class="Apple-style-span" style="color: rgb(1, 1, 1);
              font-family: 'Lucida Sans'; "><span class="Apple-tab-span"
                style="white-space:pre"> </span>Aggregate files over
              time dimension</span></div>
          <div class="O1"
            style="margin-top:5.76pt;margin-bottom:0pt;margin-left:.5in;
text-indent:0in;text-align:left;direction:ltr;unicode-bidi:embed;mso-line-break-override:
            none;word-break:normal;punctuation-wrap:hanging"><font
              class="Apple-style-span" color="#010101" face="'Lucida
              Sans'">Make use of ensemble
              dimension when appropriate</font></div>
          <div class="O1"
            style="margin-top:5.76pt;margin-bottom:0pt;margin-left:.5in;
text-indent:0in;text-align:left;direction:ltr;unicode-bidi:embed;mso-line-break-override:
            none;word-break:normal;punctuation-wrap:hanging"><font
              class="Apple-style-span" color="#010101" face="'Lucida
              Sans'">Identify missing or
              overlapping time periods </font></div>
          <div class="O1"
            style="margin-top:5.76pt;margin-bottom:0pt;margin-left:.5in;
text-indent:0in;text-align:left;direction:ltr;unicode-bidi:embed;mso-line-break-override:
            none;word-break:normal;punctuation-wrap:hanging"><font
              class="Apple-style-span" color="#010101" face="'Lucida
              Sans'">Assign non-standard
              dimensions <br>
              <span style="mso-spacerun: yes">&nbsp;</span><span
                style="mso-spacerun: yes">&nbsp; </span>(e.g. basin averages
              or fixed fields)</font></div>
          <div class="O1"
            style="margin-top:5.76pt;margin-bottom:0pt;margin-left:.5in;
text-indent:0in;text-align:left;direction:ltr;unicode-bidi:embed;mso-line-break-override:
            none;word-break:normal;punctuation-wrap:hanging"><font
              class="Apple-style-span" color="#010101" face="'Lucida
              Sans'">Handle 365_day
              calendars</font></div>
          <div
            style="margin-top:6.48pt;margin-bottom:0pt;margin-left:0in;text-indent:
0in;text-align:left;direction:ltr;unicode-bidi:embed;mso-line-break-override:
            none;word-break:normal;punctuation-wrap:hanging"><font
              class="Apple-style-span" color="#010101" face="'Lucida
              Sans'">&#8226; Create PDEF files
              for non-rectilinear grids </font></div>
          <div class="O1"
            style="margin-top:5.76pt;margin-bottom:0pt;margin-left:.5in;
text-indent:0in;text-align:left;direction:ltr;unicode-bidi:embed;mso-line-break-override:
            none;word-break:normal;punctuation-wrap:hanging"><font
              class="Apple-style-span" color="#010101" face="'Lucida
              Sans'">For ocean and sea ice realms</font></div>
          <div class="O1"
            style="margin-top:5.76pt;margin-bottom:0pt;margin-left:.5in;
text-indent:0in;text-align:left;direction:ltr;unicode-bidi:embed;mso-line-break-override:
            none;word-break:normal;punctuation-wrap:hanging"><font
              class="Apple-style-span" color="#010101" face="'Lucida
              Sans'">ESMF&#8217;s RegridWeightGen utility
              generates the<br>
              <span style="mso-spacerun: yes">&nbsp;&nbsp; </span>interpolation
              weights</font></div>
          <div class="O1"
            style="margin-top:5.76pt;margin-bottom:0pt;margin-left:.5in;
text-indent:0in;text-align:left;direction:ltr;unicode-bidi:embed;mso-line-break-override:
            none;word-break:normal;punctuation-wrap:hanging"><font
              class="Apple-style-span" color="#010101" face="'Lucida
              Sans'">Vector fields must be rotated from
              grid-relative <br>
              <span style="mso-spacerun: yes">&nbsp;&nbsp; </span>to
              Earth-relative
              coordinates before interpolation</font></div>
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            face="'Lucida Sans'"><br>
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                font-family: Helvetica; font-size: 12px; font-style:
                normal; font-variant: normal; font-weight: normal;
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                auto; -khtml-text-decorations-in-effect: none;
                text-indent: 0px; -apple-text-size-adjust: auto;
                text-transform: none; orphans: 2; white-space: normal;
                widows: 2; word-spacing: 0px; ">
                <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 moz-do-not-send="true"
                    href="mailto:jma@cola.iges.org">jma@cola.iges.org</a></div>
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      <pre wrap="">_______________________________________________
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</pre>
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