[ncl-talk] problem regrid WRF outputs to rectilinear grids using rcm2rgrid

[Dennis Shea]

Adan's response is correct
===

You could also use  *ESMF regridding*
<http://www.ncl.ucar.edu/Applications/ESMF.shtml>

*Example 5      *This is the most basic example.

Other WRF regrid examples which may be of use to you:
*Examples 20,  29 , 32 , 37*

Not WRF but generically  related:* Example 30*

On Wed, Aug 25, 2021 at 5:00 PM Adam Phillips via ncl-talk <
ncl-talk at mailman.ucar.edu> wrote:

> Hi LSL,
> I do not have any experience with rcm2rgrid, but I would guess that the
> interpolated region is correct. Looking at your two plots, the domain in
> the first plot curves southeastward on the map. The resulting regridded
> array seemingly does the same. If you drew the same box on the first plot
> that you drew on the second, I think you'll see both data arrays go outside
> the box. As far as the possible east/north shift: I think that has to do
> with your target grid (and size of the individual grid boxes), and that
> there is actually no shift. If you chose a different target grid shifted a
> bit farther south and east, I think those boundary grid points that are
> somewhat outside the box would disappear.
> Hope that helps!
> Adam
>
>
>
> On Tue, Aug 24, 2021 at 7:51 AM LSL via ncl-talk <
> ncl-talk at mailman.ucar.edu> wrote:
>
>> Dear NCL community,
>>
>>
>> I am trying to regrid WRF outputs (Lambert Conformal Projection, 3km) to
>> rectilinear grids (lat/lon, 0.5 degree) using rcm2rgrid.
>>
>>
>> It is found that the boundary of converted rectilinear grids are not
>> exactly aligned with the black square lat/lon frame. As shown in the figure
>> attached, they are a little drifted northward and eastward.
>>
>>
>> Anyone can tell me where is the problem? The script is also attached.
>>
>>
>> LSL
>>
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>
>
>
> --
> Adam Phillips
> Associate Scientist,  Climate and Global Dynamics Laboratory, NCAR
> www.cgd.ucar.edu/staff/asphilli/   303-497-1726
>
> <http://www.cgd.ucar.edu/staff/asphilli>
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