[ncl-talk] problem in GridMask using ESMF regrid

Mary Haley haley at ucar.edu
Thu Mar 3 09:10:49 MST 2016


I believe the GridMask option was added in V6.3.0, because the Mask2D was a
misleading name.  We should have documented this better.  I hopefully just
improved the documentation on this.

--Mary


On Wed, Mar 2, 2016 at 1:35 PM, Liu, Peng <pliu34 at gatech.edu> wrote:

> Dear NCL community,
>   I am writing this email to report an issue associated with the mask when
> using ESMF regrid in NCL (version 6.2.1).
>   When generating the source grid file, I would like to mask the grids
> based on if source data is missing on specific grid cell. Hence, based on
> the example on NCL website, I
> used Opt at GridMask = where (.not. ismissing (source data),1,0). However,
> in the generated source grid file, field of grid_imask has a constant value
> of 1 for all grids, which means the Opt at GridMask was not working properly.
>   I then switched to use Opt at Mask2D, and it worked.
>
> Best
> Peng Liu
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