[ncl-talk] vfXArray and vfYArray

[Sheng-Hung Wang]

Hi there

This is Sheng-Hung from BPCRC at the OSU. We are trying to plot wind 
(U10M, V10M and SPD10M) from WRF model output.  The data files are 
extracted from wrfout files.

As you can see in native model grids (plot_raw.png or plot_raw.ncgm) plot,

The winds rotate in clockwise direction at Atlantic Ocean (upperright 
corner), and counter clockwise at east of Greenland (just above map 
center).

However, after using vfXArray and vfYArray and plot on map (plot.png or 
plot.ncgm),

The winds rotate in opposite directions.

The winds over Pacific are still in an agreement (directions and 
patterns) with model native grids.

I tried  NCL 6.4 6.3.x, running on Fedora, all produced same results.

Is there a problem with vfXArray/vfYArray functions or did I something 
wrong in my script.

You can find my script/data/plots in

http://polarmet.osu.edu/datasets/proj_201706/

Thanks


Sheng-Hung

ps. I also tested sfXArray/sfYArray on each individual variables. The 
plots are fine.

-- 
========================================
  Sheng-Hung Wang, PhD
  Polar Meteorology Group
  Byrd Polar and Climate Research Center
  The Ohio State University
  1090 Carmack Road, Columbus, Ohio 43210
  Phone: (614) 292-1060
  Fax:   (614) 292-4697
  email: wang.446 at osu.edu
========================================