<br />
<br />
Hi,<br />
In general we can use U10 and V10 for different meteorological variables other than wind speed and direction.<br />
So you can use these U10 and V10 for drawing wind speed and direction<br />
with the following formula.<br />
<br />
wind speed:<br />
d mag(U10,V10)<br />
<br />
Wind vector:<br />
d skip(U10,2,2);V10<br />
<br />
As your post processed data already contain wind direction (WD10), you can use directly.<br />
I think you should get the same value for WS10 an mag(U10,V10)<br />
<br />
Hope, this helps.<br />
Regards<br />
Satyaban<br />
<br />
On Tue, 17 Aug 2010 20:44:27 +0530 wrote<br />
><br />
Dear WRF Users. <br />
This is Query Reg Surface wind speed and direction from WRF. <br />
I am getting the U10 and V10 (the ROTATED wind components) as one of the diagnostics from WRF. I have used mercator projection for the domain. <br />
Also,<br />
ws10 and wd10, are the Wind Speed (m s-1) and Direction (Degrees) at 10<br />
M is also available as one of the outputs. What is the Difference<br />
between the two. <br />
<br />
Pls clarify how to compute the actual wind speed and direction at a particular point. <br />
<br />
I have plotted all the 3 variables ie, the U10 and V10, and wd10 (attatched wind.gif). <br />
ga-> d skip(U10,2,2);V10<br />
ga-> c<br />
ga-> set cint 20<br />
cint = 20 <br />
ga-> d wd10<br />
Contouring: 20 to 340 interval 20 <br />
ga-> d skip(U10,2,2);V10<br />
ga-> printim wind.gif<br />
<br />
I am unable to find any significant difference between the U10;V10 and the ws10 and wd10. <br />
Pls clarify this doubt. <br />
geeta<br />
<br />
<br />
<br />
                                           <br />
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<br><br>-------------------------------------------------------------------------------<br />
Dr. Satyaban Bishoyi Ratna<br />
Computational Atmospheric Sciences Team<br />
Scientific & Engineering Computing Group<br />
Centre for Development of Advanced Computing (C-DAC)<br />
Pune University Campus, Ganeshkhind<br />
Pune - 411 007, Maharashtra, India<br />
E-mail: satyabanb@cdac.in<br />
Tel (O): +91-020-2570 4226, (Cell): +91-094223 56326<br />
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