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<DIV><FONT face=Arial size=2><SPAN class=177492403-05082011>Dear
Users,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=177492403-05082011>I am computing
average zonal wind shear for Dec73-Feb74 from NetCDF files with DJF months only
for all years. I am looking at shear between 850mb (first file) and 200mb
(second file). My grads script is as follows;</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=177492403-05082011></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=177492403-05082011><EM>'reinit'<BR>'sdfopen
uwndDJF_1900_2008.cdf'<BR>'sdfopen uwndDJF_200_1900_2008.cdf'<BR>'set background
1'<BR>'set annot 0 6'<BR>'set map 0 1 8'<BR>'set xlopts 0 4'<BR>'set ylopts 0
4'<BR>'set lat -60 0'<BR>'set lon 100 180'<BR>'set gxout contour'<BR>'set lev
850'<BR>'define u=ave(uwnd,t=26353,t=26712)'<BR>'set lev 200'<BR>'define
u1=ave(uwnd,t=26353,t=26712)'<BR>'d u1-u'<BR>'draw title 1973-74 Average zonal
DJF wind shear (m/s)'<BR>'printim ZW_Map_DJF7374.jpeg x400 y300'
<BR></EM></SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=177492403-05082011>and when I query my
files this is what I get;</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=177492403-05082011></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=177492403-05082011><EM>ga-> q file
1
<BR>File 1 : <BR> Descriptor: uwndDJF_1900_2008.cdf<BR> Binary:
uwndDJF_1900_2008.cdf<BR> Type = Gridded<BR> Xsize = 41 Ysize
= 31 Zsize = 1 Tsize = 39096 Esize = 1<BR> Number of
Variables = 1<BR> uwnd 1 t,z,y,x
6-hourly U-wind on Pressure Levels<BR>ga-> q file 2<BR>File 2 : <BR>
Descriptor: uwndDJF_200_1900_2008.cdf<BR> Binary:
uwndDJF_200_1900_2008.cdf<BR> Type = Gridded<BR> Xsize = 41
Ysize = 31 Zsize = 1 Tsize = 39096 Esize = 1<BR> Number
of Variables = 1<BR> uwnd 1 t,z,y,x
6-hourly U-wind on Pressure Levels</EM></SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=177492403-05082011></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=177492403-05082011>When I run my script
I get an error message <EM>" Data Request Warning: Request is completely
outside file limits"</EM> and I don't understand why. The areal limits are
correct and I have cross-checked them and the time-steps are 6-hourly daily wind
components. May somebody assist me please? </SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=177492403-05082011></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=177492403-05082011></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN
class=177492403-05082011>Regards</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=177492403-05082011>Simba</DIV></SPAN></FONT>
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<p><span style="font-family:'Courier New';font-size:9pt; color:#000000;">Think B4U Print</span></p>
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<p><span style="font-family:'Courier New';font-size:9pt; color:#000000;">3 sheets of A4 paper = 1 litre of water</span></p>
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