Re: How to call wind direction variables in NCL from U and V wind vectors

Use atan2 (http://www.ncl.ucar.edu/Document/Functions/Built-in/atan2.shtml
)
  -dave

On Jun 8, 2010, at 5:24 PM, Jinwoong Yoo wrote:

> Hi.
>
> I'd like to plot wind directions colored by azimuth angle for a
> visual effect.
> I'm using NCEP/NCAR Reanalysis data so wind vector comes from u and v.
>
> Since wind direction can be plotted with such as arrows or wind barbs,
> I assume that there should be a way to call the wind direction.
>
> If the wind direction (like from 0 to 360 degree to the north)can be
> called,
> I think wind directions can be plotted with color as a scalar using
> plot
> function such as gsn_csm_vector_scalar_map_ce.
>
> Does anybody know how to call the wind direction?
>
> Thank you.
>
>
> Jinwoong Yoo
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Received on Tue Jun 8 17:27:23 2010