Hello,
I am rather new to NCL, but learning eagerly.
I have been encountering a rather strange problem that seems to be related to either my installation of NCL.
The problem I have been having is a seemingly random region of 'noise' amidst the plotted data. This occurs regardless of which forecast hour (which file) I plot, or within a given file, which parameter I plot, though the location and magnitude of the region of 'noise' varies. Illustrating this I have attached a sample PDF of 500 hpa heights from a 1deg GEFS mean grib forecast (never mind the title on the PDF), the the corresponding NCL script.
I fellow (and more experienced) NCL user running Linux ran this script on his machine using a copy of the same grib file and had a perfect plot -- no 'noise'. Further, using, degrib, I exported some of the same files' parameters to a shp file and examined them, finding the data to look good. As such, I am reasonably convinced that the problem does not lie in the grib file, or the script themselves (though I would happy to be proven wrong).
Any thoughts or suggestions as to what I can check or more simply, how I can fix this problem?
I am running NCL 4.2.0.a033 on a Windows XP machine under CYGWIN that was current as of less than a month ago (cygwin.exe v 1.5.24-2)..
Sincerely,
Jacob Klee
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Received on Fri Mar 16 2007 - 12:35:04 MDT