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surfdata sets for non-regular grids

xgao304

Member
Hi,

My understanding is that "mkgriddata" and "mksurfdata" tools can only be used to generate the regular grid. In order to run CLM for non-regular grids like T62, I downloaded the generated data (griddata, fracdata, and surfdata) at T62 from the ncar inputdata directory.
However, I found two versions of data sets are not consistent with each other. Here is the detail information:

fracdata_94x192_gx1v4_060711.nc
fracdata_94x192_T62_c081219.nc

griddata_94x192_060711.nc
griddata_94x192_c081219.nc

surfdata_94x192_060711.nc
surfdata_94x192_c081219.nc

I tend to use the version c081219 which seems to be more recent, but found that the fracdata has constant values for landmask and landfrac over the global - the data does not differentiate the land and ocean. If I use the version 060711, I noticed that surfdata_94x192_c081219.nc claims more land points over the tropical compared with surfdata_94x192_060711.nc and some difference exists in the arctic region as well.

Any information about how to chose these data sets will be high appreciated.

Xiang
 
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