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<P><BR>Dear frineds,</P>
<P>My problem is to construct a time series representing an area average of
a parameter, say temperature, over the area say (100-130E, 10-30N).
But I am only interested in the average over land. </P>
<P>Thus, do anyone know how to define the variable representing an
areal average over land only?</P>
<P>Thanks</P>
<P>MC</P></DIV></div><br clear=all><hr> <a
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