I'm assuming you are using the WRF, and if so you should have a variable called LANDMASK in your history files...it takes on the values of 1 for land and 0 for sea. If you have that variable, you can use that as the mask.<br>
<br>Jeff Duda<br><br><div class="gmail_quote">On Tue, Oct 27, 2009 at 7:23 AM, Sachin Ghude <span dir="ltr"><<a href="mailto:sachinghude@tropmet.res.in">sachinghude@tropmet.res.in</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi,<br>
<br>
I want to plot tropospheric NO2 only over the Indian grid points (not Nepal, Pakistan<br>
and BanglaDesh). Is there any such utility so that it will enable me to plot data only<br>
for India girds in GRADs. ( my grid size is 0.25 x 0.25 degrees).<br>
<br>
please do the needful..<br>
<br>
bye..<br>
<font color="#888888"><br>
Sachin<br>
</font></blockquote></div><br><br clear="all"><br>-- <br>Jeff Duda<br>Iowa State University<br>Meteorology Graduate Student<br>3134 Agronomy Hall<br><a href="http://www.meteor.iastate.edu/~jdduda">www.meteor.iastate.edu/~jdduda</a><br>