How to change water body completely in static data

Questions related to the use of new landuse, or geographical static data, or to modifications to the existing data
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dengxw
Posts: 8
Joined: Mon Dec 14, 2020 9:33 am

How to change water body completely in static data

Post by dengxw » Sun Jan 31, 2021 4:21 am

Hi WRF forum,
I changed all Water(17) to Croplands (12) and I have writed the new static data to the geogrid binary format.
By the way, I choosed IGBP-Modified MODIS 20-category Land Use Categories.
LANDMASK and LANDUSEF changed correspondingly.
But the GREENFRAC didn't change correspondingly in geogrid.exe.
It is still the default GREENFRAC.
In attachments, I added my LU_INDEX & GREENFRAC to express my problem more clearly.
Please tell me how to change water body completely.
Thank you!
Seaven.
Attachments
GREENFRAC.JPG
LU_INDEX.JPG

Ming Chen
Posts: 1444
Joined: Mon Apr 23, 2018 9:42 pm

Re: How to change water body completely in static data

Post by Ming Chen » Tue Feb 09, 2021 3:32 am

I don't know what approach you used to change the land use point from water to cropland. But I suppose that you have information what grids are changed. You can change greenfrac from zero to the value you want to specify at this points. Note that greefrac is a 3D variable with the dimension of (nmonth, nlat, nlon), nmonth=12, nlat and nlon are the grid numbers in north-south and east-west direction.
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