[Wrf-users] WRF WPP Wind u and v components
Tricia Slovacek
tricia at ucar.edu
Mon Apr 16 10:47:29 MDT 2012
Hi-
To complete this answer, yes the u and v winds are on mass points when
output from WPP (or UPP).
Cheers;
Tricia Slovacek
On 04/11/2012 12:28 PM, Jason Padovani Ginies wrote:
> Hi there,
>
> As I am to understand, WRF rotates earth winds to grid winds during the
> simulation. However two variables in the output are sinalpha and
> cosalpha. In order to rotate back the output u and v components to earth
> relative, you have to use the equations found in the link I am including
> hereunder
>
> http://forum.wrfforum.com/viewtopic.php?f=8&t=3225
> <http://forum.wrfforum.com/viewtopic.php?f=8&t=3225>
>
> Good luck, hope this helps.
>
> Jason
>
> On Wed, Apr 11, 2012 at 9:03 AM, Rambler <soleiman at rambler.ru
> <mailto:soleiman at rambler.ru>> wrote:
>
> Hello to all
> Could some one explain me the wind u and v components in grib files
> which made by WRF WPP is rotated to the earth coordinate ( north,
> east) or in grid direction (x, y) ? Also they are in mass point or not?
> Thanks.
>
> Best regards,
> Suleiman Mostamandy
>
>
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