[gradsusr] Convert 0.625x0.5 degree data to 1 degree gridded

[Endalkachew Bekele - NOAA Affiliate]

Hi Justin,

If you are using GrADS 2.0.0 or later, you may try the lterp function (
http://cola.gmu.edu/grads/gadoc/gradfunclterp.html).

Endalk


On Thu, Jul 21, 2016 at 11:22 AM, Justin Hicks <jhicks2014 at gmail.com> wrote:

> Users,
>
> I am trying to convert 0.625x0.5 degree gridded MERRA2 precipitation data
> to 1 degree gridded data. There wasn't much help online as how to do this,
> but the 1 degree file I made does seem to spit out data that is different
> from the original. I'll post the commands I used to do this. The variable
> name is 'prectot':
>
> open MERRA2_Monthly_1980-1991_Flx
> set t 1 last
> define prectot=prectot
> newgrid=regrid2(prectot,1.0)
> set sdfwrite
> /data2/control/MERRA2_Monthly_1980-1991_Flx_1Deg_TotalPrecipitation.nc
> sdfwrite prectot
>
>
>
> I'm not sure if this was the correct way to do this or not. The contents
> of ncdump for the new file still suggest that it's not 1 degree, yet the
> values are different between the two files. I also tried to set the lat/lon
> for the new file to a small, fixed value to see the grid sizes, but there
> was an error with the grid limits, so all values showed undefined.
>
> Any help would be appreciated; I just want to double check to see if I
> converted to 1 degree correctly.
> --
> *Justin*
>
> *UndergraduateAtmospheric Sciences Major*
>
> *GIS MinorUniversity of Maryland-College Park*
>
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>
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