As the WRF model does its calculations on a projection, it is fine to plot the u,v on this map, but if you want to compare the wind to an observation, you will need to rotate the winds back to earth, which is what uvmet will do for you
wrfhelp
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http://www.mmm.ucar.edu/wrf/users/supports/wrfhelp.html
On Jul 6, 2012, at 8:36 AM, Dennis Shea wrote:
> This has been forwarded to wrfhelp@ucar.edu
>
> Cheers
>
> On 7/6/12 8:26 AM, Nicolas Baldeck wrote:
>> Hi,
>>
>> I need some clarifications.
>>
>> This is about wrf_user_getvar, with "uvmet" arguments.
>>
>> That's documented :
>> /uvmet/: U and V components of wind rotated to earth coordinates
>>
>> So, what "earth coordinates" stands for ?
>>
>> U => longitudes ? with 0 ~= london
>> V => latitudes ? with 180 ~= north
>>
>> Thanks
>>
>> --
>> Nicolas BALDECK
>> Prévisions Météo libres et gratuites pour le Vol Libre et le Vol à Voile.
>> http://rasp-france.org/
>>
>>
>>
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Received on Mon Jul 16 11:23:31 2012
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