Re: Offset terrain in WRF Polar Stereographic

Hi Don,

Usually when you run into a problem with the WRF data not overlaying
properly on the map, it's because the map projection is not set up
correctly. This is done for you by the wrf_map_overlays function, and
it's possible that there's either a bug in this function, or a bug on
the WRF output file.

I'm downloading your WRF output file now (it's taking its merry
time), and will take a look.

Meanwhile, maybe wrfhelp knows if there are any problems on WRF
v3.1.1 files that might screw up the map projection somehow...

--Mary

On Feb 16, 2010, at 12:04 PM, Don Morton wrote:

> Hi,
>
> I thought this problem had been resolved ages ago, but maybe only
> for Lambert projections.
>
> I'm using NCL 5.1.1 on WRF v3.1.1 netCDF output with polar
> stereographic projection, and I'm running into the same old terrain-
> offset issues that some of us have mentioned over the past several
> years.
>
> Am I correct in my expectations that the WRF NCL mapping routines
> "should" handle this these days? Or, am I possibly missing
> something key? I can go back and handle this the old way, using
> the standard NCL plotting functions I once used, with the following
> sorts of resource settings
>
> res@gsnAddCyclic = False ; Regional data, not
> cyclic
> res@tfDoNDCOverlay = False ; Set True for
> native projection
>
> ; Specify map boundaries
> res@mpLimitMode = "Corners" ; Use the corners
> limit mode
>
>
> and not using all those convenient WRF functions, but now I'm
> wondering...
>
>
> My resulting image is at
>
> <http://weather.arsc.edu/Miscellaneous/NCLWoes/Hgt.png>
>
> With a simplified script available at
>
> <http://weather.arsc.edu/Miscellaneous/NCLWoes/Hgt.ncl>
>
> and the wrfout file (870 Mbytes) available at
>
> <http://weather.arsc.edu/Miscellaneous/NCLWoes/
> wrfout_d01_2009-12-20_00:00:00>
>
>
> --
> Arctic Region Supercomputing Center
> http://www.arsc.edu/~morton/
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Received on Tue Feb 16 15:19:17 2010