Hai Midhun,<br><br>There is a file called <a href="http://lsmask.nc">lsmask.nc</a> in the same folder. You can download it from here (<a href="http://www.esrl.noaa.gov/psd/data/gridded/data.noaa.oisst.v2.html">http://www.esrl.noaa.gov/psd/data/gridded/data.noaa.oisst.v2.html)</a><br>
<br>Then use the maskout function to mask the land area but setting it undefines. The code is given below.<br><br><br>'reinit'<br>'sdfopen <a href="http://sst.mnmean.nc">sst.mnmean.nc</a>'<br>'sdfopen <a href="http://lsmask.nc">lsmask.nc</a>'<br>
'set gxout shaded'<br>'d maskout(sst,mask.2(t=1)-1)'<br>'cbarn'<br><br>regards<br><br>krishnamohan<br><div class="gmail_quote">On Wed, Mar 21, 2012 at 10:44 AM, Yaqiang Wang <span dir="ltr"><<a href="mailto:yaqiang.wang@gmail.com">yaqiang.wang@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">The SST data files from the website have already been masked with<br>
missing value on land (attached figure).<br>
<div><div class="h5"><br>
On Wed, Mar 21, 2012 at 12:05 PM, Midhun M <<a href="mailto:midhun.ndr@gmail.com">midhun.ndr@gmail.com</a>> wrote:<br>
> please help me in masking NOAA OI sst data.<br>
><br>
> SST data:<br>
> <a href="http://www.esrl.noaa.gov/psd/cgi-bin/db_search/DBSearch.pl?Dataset=NOAA+Optimum+Interpolation+%28OI%29+SST+V2&Variable=Sea+Surface+Temperature" target="_blank">http://www.esrl.noaa.gov/psd/cgi-bin/db_search/DBSearch.pl?Dataset=NOAA+Optimum+Interpolation+%28OI%29+SST+V2&Variable=Sea+Surface+Temperature</a><br>
> Land sea Mask: <a href="ftp://ftp.cdc.noaa.gov/Datasets/noaa.oisst.v2/lsmask.nc" target="_blank">ftp://ftp.cdc.noaa.gov/Datasets/noaa.oisst.v2/lsmask.nc</a><br>
><br>
> regards,<br>
> Midhun<br>
><br>
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<span class="HOEnZb"><font color="#888888"><br>
<br>
<br>
--<br>
*************************************************<br>
Dr. Yaqiang Wang<br>
Chinese Academy of Meteorological Sciences (CAMS)<br>
46, Zhong-Guan-Cun South Avenue<br>
Beijing, 100081<br>
China<br>
<br>
<a href="mailto:yaqiang.wang@gmail.com">yaqiang.wang@gmail.com</a><br>
<br>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Krishnamohan.K.S<br>CSIR Research Fellow<br>Department Of Atmospheric Sciences<br>Cochin University of Science and Technology<br>Cochin,India<br>