Re: NAM precip interpolation

I'm pretty sure in the NAM model the precip field is a function of
(y,x) not (lat,lon), and the lat/lon coordinates are also a function
of (y,x) since it is an equal area grid.
You need to convert the lat and lon variables to 1D variables (using
ndtooned) and convert the precip to 1D as well.
Then use cssgrid to do the interpolation (http://www.ncl.ucar.edu/Document/Functions/Built-in/cssgrid.shtml
).
Are you really trying to go from 12km to 4km? It's usually best to
go the other way. Interpolation could lead to some spurious results.

-Jamie

On Apr 30, 2009, at 3:52 PM, ncl-talk-request_at_ucar.edu wrote:

> Hi
>
> Does anyone has recommendation on which NCL interpolation function I
> should use for interpolating 12 km NAM model data to 4km.
> I need it to do a spatial interpolation.
> Was trying to use linint2 but i get messages saying my input lat lon
> arrays have to be 1 dimension less than my input data array, which I
> have no clue since is just a 2d input data of precipitation.
>
> Thanks
> Agness

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Received on Thu Apr 30 2009 - 16:54:05 MDT