[gradsusr] Regridding in GrADS

Eduardo Agosta Scarel eduardo.agosta at gmail.com
Wed Aug 1 07:19:28 EDT 2018


Try to use the re function within a time frame:

t1= initial time
t2= final time
'set t 't1' 't2
'define newvar=re(var,0.17)

That will regrid var all through the time steps between  times t1 and t2.

Edu.

El jue., 26 de jul. de 2018 a la(s) 16:26, Wesley Ebisuzaki - NOAA Federal (
wesley.ebisuzaki at noaa.gov) escribió:

> Joseph,
>
> I would use copygb.  Copygb has a few types of interpolation
> methods and you can define fields that are vector interpolated.
> (Affects winds near the poles.)
>
> Wesley
>
>
>
> On Wed, Jul 25, 2018 at 9:59 PM, Joseph Basconcillo <
> jbasconcillo at pagasa.dost.gov.ph> wrote:
>
>> Hi, I have NCEP-RA2 data that I want to regrid to N768 resolution, which
>> is about 0.17 deg in midlatitude.
>>
>> I used:
>>
>> 'define newvar=re(var, 0.17)'
>>
>> And it worked.
>>
>> However, the file size is smaller than I expected. The original size is
>> 63MB (2.5 deg) and when I regrid them to 0.17 deg, the file size resulted
>> to about 17.5MB. I have my doubts considering I re-gridded the data to
>> higher resolution. File size should be higher. That was what I expected.
>>
>> Then when I used to tloop and area-average to test the data:
>>
>> 'd tloop(aave(var,global))'
>>
>> A prompt appeared that "entire grid are set to missing data". And it kept
>> looping for few minutes. My guess is that the re-gridding did not "regrid"
>> through time and considered only the first timestep. Can you help me on
>> this?
>>
>> Also, is there an option for regridding method (e.g. bilinear)?
>>
>> Thank you.
>>
>> Yours,
>>
>> Joseph Basconcillo
>> _______________________________________________
>> gradsusr mailing list
>> gradsusr at gradsusr.org
>> http://gradsusr.org/mailman/listinfo/gradsusr
>>
>
> _______________________________________________
> gradsusr mailing list
> gradsusr at gradsusr.org
> http://gradsusr.org/mailman/listinfo/gradsusr
>


-- 
Eduardo Agosta Scarel

"The Carmelite NGO is a way to promote justice, peace and care for creation"
"La ONG Carmelita es una manera de promover la justicia, la paz y el
cuidado de la creación"
*http://carmelitengo.org/ <http://carmelitengo.org/>*
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://gradsusr.org/pipermail/gradsusr/attachments/20180801/d60a8223/attachment.html>


More information about the gradsusr mailing list