[NARCCAP-discuss] Wind Vectors

[Jonas Roberts]

Thanks Seth, I just wanted to make sure.

I can get GrADS to do the interpolation without rotating the wind vectors -
it just requires a little more custom work (providing a file that defines
the grid point coords rather than using the built in projections).

All the best,
Jonas


On Tue, Dec 11, 2012 at 2:51 PM, Seth McGinnis <mcginnis at ucar.edu> wrote:

> Hi Jonas,
>
> The u- and v-components of wind are true east-west and true north-south,
> respectively.  If GrADS won't play nice with the data, maybe try NCL or
> UV-CDAT.
>
> Cheers,
>
> --Seth
>
> ----
> Seth McGinnis
> NARCCAP Data Manager
> Associate Scientist
> IMAGe / NCAR
> ----
>
> On Tue, 11 Dec 2012 14:34:53 -0330
>  Jonas Roberts <jonaspmr at gmail.com> wrote:
> >Hello,
> >
> >Do the u and v components of wind (for all pressure levels) follow true
> >east-west and north-south or do they follow the i and j directions of each
> >projection? (the website leads me to believe its true east-west,
> >north-south, but I wanted to confirm)
> >
> >The reason I ask is that I'm using GrADS visualization software to analyze
> >atmospheric moisture convergence for a variety of RCM-GCMs. GrADS does
> >interpolations from predefined projections (polar stereographic, etc) to a
> >standard lat-lon grid. As a part of this interpolation it assumes that the
> >u and v wind vectors of the pre-interpolated data follow along the i and j
> >directions respectively and not true east-west, north-south.
> >
> >Thanks for your time,
> >Jonas Roberts
> >PhD Candidate
> >Faculty of Engineering and Applied Science
> >Memorial University of Newfoundland
> >_______________________________________________
> >narccap-discuss mailing list
> >narccap-discuss at mailman.ucar.edu
> >http://mailman.ucar.edu/mailman/listinfo/narccap-discuss
>
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