Re: EASE grid and esmf warning messages

Dave,

I think the issue is that your lat/lon arrays contain missing values all along two rows and two columns. Even though you are setting the SrcMask array, it still has trouble because of the nature of the missing values.

One possibility is to treat this as an unstructured grid, by throwing away all the missing points, and saving the valid points in 1D arrays for a call to unstructured_to_ESMF. See the attached script.

This is a unique example that could be useful for our ESMF regridding page. If you could provide me with the variable you want to regrid, and what you are regridding to (or from), then I can try to come up with a complete example for this page.

Thanks,

--Mary

On May 22, 2014, at 9:21 AM, David B. Reusch <dreusch@ees.nmt.edu> wrote:

> Hi,
>
> I am getting a huge number of warning messages when doing curvilinear_to_SCRIP for an EASE grid with lots of FillValues. I recognize they are *warning* mesages so possibly nothing to worry about, but I wanted to be sure.
>
> I'm using the southern hemisphere EASE grid from NSIDC so the square input array has a circle of valid data in the middle surrounded by FillValues. I seem to be getting two of the message below for each FillValue point:
> warning:avg: Entire input array contains missing values, can't compute average
>
> Assuming it would work, and as long as I'm not hiding a real problem, I'm willing to use the "how to suppress warnings" code (from the FAQ).
> err = NhlGetErrorObjectId()
> setvalues err
> "errLevel" : "Fatal" ; only report Fatal errors
> end setvalues
> I've put esmf_def_curvi.tgz in the incoming ftp. It has the ncl script (define_grid_curvilinear.ncl), input (EASE_125KM_lat_lon.nc) & output (EASE_125KM_esmf_grid_reg.nc) files and output messages (def_EASE125.out) from the script.
>
> Thanks,
> Dave
> --
> Associate Research Professor of Climatology
> Dept of Earth and Environmental Science
> MSEC 304; 801 Leroy Place
> New Mexico Tech
> Socorro, NM 87801
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