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<p>Hello ncl users,</p>
<p>I was wondering if someone has attempted using the ESMF
regridding function to loop over 3D variable e.g. different time
periods/ depth levels?</p>
<p>example <a
href="https://www.ncl.ucar.edu/Applications/Scripts/ESMF_regrid_5.ncl">ESMF_regrid_5.ncl</a>
shows a somewhat way to archieve this but it is a bit confusing. <br>
</p>
<p>What i would like to do is regrid for my variable T= [time |
2172] x [j | 384] x [i | 320] to get the end result for each time
resulting in the same 3 dimension.</p>
<p>Sri<br>
</p>
<div class="moz-cite-prefix">On 05.11.21 23:13, Dennis Shea wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAOF1d_4YVQPUm53kW1P8Cpf9No6_1YWg4Os2XXFvuJ4-UisrEQ@mail.gmail.com">
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<div dir="ltr">
<div>The pop2lat_1.ncl i script approach was an older method to
regrid.</div>
<div>I would suggest ESMF regridding:<br>
</div>
<div><a href="http://www.ncl.ucar.edu/Applications/ESMF.shtml"
moz-do-not-send="true"><b>http://www.ncl.ucar.edu/Applications/ESMF.shtml</b></a></div>
<div>Example 24<br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Fri, Nov 5, 2021 at 7:33 AM
Sri nandini via ncl-talk <<a
href="mailto:ncl-talk@mailman.ucar.edu"
moz-do-not-send="true" class="moz-txt-link-freetext">ncl-talk@mailman.ucar.edu</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p>Hello dear ncl-users,</p>
<p>Can someone advice me whether the following method is
correct?</p>
<p>I have an initial CESM POP file with lat and lon in
generic grid which looks like the below:</p>
<p>netcdf
zos_Omon_CESM1-CAM5_historical_rcp85_r38i1p1_192001-210012
{<br>
dimensions:<br>
time = UNLIMITED ; // (2172 currently)<br>
i = 320 ;<br>
j = 384 ;<br>
variables:<br>
double time(time) ;<br>
time:standard_name = "time" ;<br>
time:long_name = "time" ;<br>
time:units = "days since 0000-01-01 00:00:00" ;<br>
time:calendar = "365_day" ;<br>
time:axis = "T" ;<br>
int i(i) ;<br>
i:long_name = "cell index along first dimension" ;<br>
i:units = "1" ;<br>
i:axis = "X" ;<br>
int j(j) ;<br>
j:long_name = "cell index along second dimension"
;<br>
j:units = "1" ;<br>
j:axis = "Y" ;<br>
float lat(j, i) ;<br>
lat:standard_name = "latitude" ;<br>
lat:long_name = "latitude coordinate" ;<br>
lat:units = "degrees_north" ;<br>
float lon(j, i) ;<br>
lon:standard_name = "longitude" ;<br>
lon:long_name = "longitude coordinate" ;<br>
lon:units = "degrees_east" ;<br>
float zos(time, j, i) ;<br>
zos:standard_name =
"sea_surface_height_above_geoid" ;<br>
zos:long_name = "sea_surface_height_above_geoid" ;<br>
zos:units = "m" ;<br>
zos:_FillValue = 1.e+20f ;<br>
zos:missing_value = 1.e+20f ;<br>
zos:comment = "Created using NCL code" ;<br>
zos:cell_methods = "time: mean (interval: 1
month)" ;<br>
zos:history = "SSH/100" ;<br>
zos:original_units = "cm" ;<br>
zos:original_name = "SSH" ;</p>
<p>I tried several methods to convert this into a regular
LatLon grid, finally using the method from here: <a
href="https://www.ncl.ucar.edu/Applications/pop2lat.shtml"
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">https://www.ncl.ucar.edu/Applications/pop2lat.shtml</a></p>
<p>I used the <a
href="https://www.ncl.ucar.edu/Applications/Scripts/pop2lat_1.ncl"
target="_blank" moz-do-not-send="true">pop2lat_1.ncl</a>:
to interpolate with this POP weights file: <a
href="http://map_gx1v6_to_1x1d_bilin_da_100716.nc"
target="_blank" moz-do-not-send="true">map_gx1v6_to_1x1d_bilin_da_100716.nc</a>.</p>
<p>Attached here is the script i modified as well as the
plot. I do not get any error, but i wish to know if this
was the correct method? There are many POP weights
available and i choose this one. <br>
</p>
<p>Best</p>
<p>Sri<br>
</p>
<pre cols="72">--
Dr. Sri Nandini-Weiss
Center for Earth System Research and Sustainability (CEN)
Cluster of Excellence 'Climate, Climatic Change, and Society' (CLICCS)
Universität Hamburg
Institute of Oceanography
Bundesstraße 53
20146 Hamburg
Germany</pre>
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<pre class="moz-signature" cols="72">--
Dr. Sri Nandini-Weiss
Center for Earth System Research and Sustainability (CEN)
Cluster of Excellence 'Climate, Climatic Change, and Society' (CLICCS)
Universität Hamburg
Institute of Oceanography
Bundesstraße 53
20146 Hamburg
Germany</pre>
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