Re: Regridding Daymet Joined Tiles with ESMF_Regridding on NCL 6.1.0

From: Ping Yang <pyang_at_nyahnyahspammersnyahnyah>
Date: Sat Nov 03 2012 - 21:37:06 MDT

Dear NCL,

I am still stuck at here for the joined Daymet grid.

On Tue, Oct 30, 2012 at 6:40 PM, Dave Allured <> wrote:

> Ping,
> Your script is using sfile->lat and sfile->lon. If this is the same
> merged file that you showed yesterday, then sfile->lat and sfile->lon
> will contain gaps filled with zeros rather than valid lats and lons.
> This may or may not cause the regrid function to fail. Perhaps
> someone familiar with that function could say whether this would work.
*the zeros value made the ESMF regriding fail. *

> The simple remedy would be to operate on a rectangular subset of the
> merged file that does not have any coordinate gaps.

*What is a rectangular subset? I tried to use cdo to sellonlatbox to subset
but it told me the grid is a generic grid which can not be subseted. *

> The better remedy
> would be to fill in all of the missing lats and lons, which is beyond
> the scope of the current version of my join script.
*I am thinking is that possible to interpolate those missing lats and lons
instead of put zero value to them. Do you have some idea?*

> Another solution would be to have the regrid function compute source
> lats and lons from native grid projection parameters, rather than the
> source 2-D coordinates. I do not know whether *any* NCL regrid
> functions have this kind of support.
*I hope if there is an ESMF specialist can give some advice on this.*

Thank you so much.



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Received on Sat Nov 3 21:37:16 2012

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