<div>Dear Valerio,</div>
<div> </div>
<div>I think you are just averaging variable instead of areal average. Try to change it in two ways as follow,</div>
<div> </div>
<div>
<dl>
<dd>'sdfopen <a onclick="return top.js.OpenExtLink(window,event,this)" href="http://gpcp.03.8204.mean.mon.nc/" target="_blank">gpcp.03.8204.mean.mon.nc</a>'
<dd>'set t 1 23'
<dd>'define tseries = aave(psg,lon=6,lon=20,lat=37,lat=47)'
<dd>'sdfopen <a onclick="return top.js.OpenExtLink(window,event,this)" href="http://hgt500.02.8204.mean.mon.nc/" target="_blank">hgt500.02.8204.mean.mon.nc</a>'
<dd>'set lon -180 180'
<dd>'set lat -90 90'
<dd>
<div>'set t 1'</div>
<dd>
<div>'d tcorr(tseries,hgt.2,t=1,t=23)' </div>
<dd>'close 1' </dd></dd></dd></dd></dd></dd></dd></dd></dd></dl>
<p><br><font face="Courier New"><em>tseries</em> </font>- which varies in time<br><code><i>hgt</i> </code>- which varies in time and may also vary in X and Y<br><br>the other way is like </p></div>
<dl>
<dd>'sdfopen <a onclick="return top.js.OpenExtLink(window,event,this)" href="http://gpcp.03.8204.mean.mon.nc/" target="_blank">gpcp.03.8204.mean.mon.nc</a>'
<dd>'set lon -180 180'
<dd>'set lat -90 90'
<dd>
<div>'set t 1 23'</div>
<dd>
<div>'define tseries = aave(psg,lon=6,lon=20,lat=37,lat=47)' </div>'close 1'
<dd>***************************
<dd>'sdfopen <a onclick="return top.js.OpenExtLink(window,event,this)" href="http://hgt500.02.8204.mean.mon.nc/" target="_blank">hgt500.02.8204.mean.mon.nc</a>'
<dd>'set lon -180 180'
<dd>'set lat -90 90'
<dd>
<div>'set t 1'</div>
<dd>
<div>'d tcorr(tseries,hgt,t=1,t=23)' </div>
<dd>'close 1'</dd></dd></dd></dd></dd></dd></dd></dd></dd></dd></dd></dd></dl>
<div> </div>
<dl>
<dd>
<div>Cheers</div></dd></dl>
<p>Siraj</p>
<div>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<dl>
<dd><br clear="all"><br>-- <br>Siraj Ul Islam<br>1: Research Fellow (Climate Section)<br>Global Change Impact Studies Centre<br>First Floor Saudi Pak tower <br>Blue Area Islamabad Pakistan<br>Ph : 92-51-9219785<br>Fax : 92-51-9219787
<br><br>2: Mphil Scholar <br>Computational Physics and Simulation Group<br>Department of Physics<br>Quaid e Azam University <br>Islamabad.<br><br><br><br></dd></dl></blockquote></div>