Zoom-in drawing from WRF

Dear NCL Team,

I am working on extracting total precipitation data from WRF and make a plot
with the help of NCL script adopted from web (
http://www.mmm.ucar.edu/wrf/OnLineTutorial/Graphics/NCL/Examples/PRECIP/wrf_Precip.htm).
The script worked fine when I was about to make a full domain plot, but the
problem appeared when I had a zoomed view. The contour data failed to align
to the basemap lat/lon. The same problem persisted when I kept the full
domain plot but I changed it to mercator projection. I guess the causes of
the problems for the above behaviours are the same. Certain settings about
WRF map overlays have to be done.

I only modified a few of the NCL script from the mentioned web, except that
I only made a plot on total precipitation, and I added some codes for
changing the projection and lat/lon corners:
* mpres@mpProjection = "Mercator"
  mpres@mpDataSetName = "Earth..1"
  mpres@mpDataBaseVersion = "HighRes" ; "Ncarg4_1"

  mpres@mpLimitMode = "Corners"
  mpres@mpLeftCornerLatF = 20.0
  mpres@mpLeftCornerLonF = 116.0
  mpres@mpRightCornerLatF = 26.0
  mpres@mpRightCornerLonF = 124.0

  mpres@tfDoNDCOverlay = True*

I would like to keep the approach of using "wrf_contour" and
"wrf_map_overlays" in the NCL script. Is it possible to do that?

Please let me know if you want to take a look at my whole script and tell me
where I can upload it. Thanks a lot!

Regards,
Samuel Leung

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Received on Fri Jan 7 01:12:02 2011