A regular grid surface dataset can be generated at run time for a
single gridcell or for gridcells comprising a regular regional or
global domain. To generate a surface dataset for a regional run, the
cpp tokens LSMLON and LSMLAT must be set to the desired
resolution (e.g., LSMLON=1, LSMLAT=1 for a single point
simulation) and the variables MKSRF_OFFLINE_EDGES, MKSRF_OFFLINE_EDGEN, MKSRF_OFFLINE_EDGEE, and MKSRF_OFFLINE_EDGEW and their values need to be added to the
namelist. A surface dataset will be created with the name
surface-data.LSMLONxLSMLAT.nc (e.g., for a single point simulation the
file name will be surface-data.001x001.nc). The model can then be run
for the single point or for the regional domain by following Example 1
where FSURDAT is set to the new surface dataset.
In the following example, a regional grid is created over the amazon. LSMLON and LSMLAT should be set to 15 and 11, respectively to obtain an regional surface dataset on a 3x3 grid.
&clmexp CASEID = 'create_regional_surfdat' NSREST = 0 NESTEP = 2 START_YMD = 19971231 DTIME = 1800 FSURDAT = ' ' FRIVINP_RTM = '$CSMDATA/rtmdata/rdirc.05' FPFTCON = '$CSMDATA/pftdata/pft-physiology' OFFLINE_ATMDIR = '$CSMDATA/NCEPDATA' MKSRF_OFFLINE_FNAVYORO = '$CSMDATA/rawdata/mksrf_navyoro_20min.nc' MKSRF_FVEGTYP = '$CSMDATA/rawdata/mksrf_pft.nc' MKSRF_FSOITEX = '$CSMDATA/rawdata/mksrf_soitex.10level.nc' MKSRF_FSOICOL = '$CSMDATA/rawdata/mksrf_soicol_clm2.nc' MKSRF_FLANWAT = '$CSMDATA/rawdata/mksrf_lanwat.nc' MKSRF_FGLACIER = '$CSMDATA/rawdata/mksrf_glacier.nc' MKSRF_FURBAN = '$CSMDATA/rawdata/mksrf_urban.nc' MKSRF_FLAI = '$CSMDATA/rawdata/mksrf_lai.nc' MKSRF_OFFLINE_EDGEN = 12 MKSRF_OFFILNE_EDGES = -21 MKSRF_OFFLINE_EDGEE = -36 MKSRF_OFFLINE_EDGEW = -81 /
FSURDAT = ' '
A surface dataset named surface-data.LSMLONXLSMLAT.nc will be created
in the model executable directory. LSMLON and LSMLAT are defined in
jobscript.csh (see 3.1.3).
MKSRF_OFFLINE_FNAVYORO = '$CSMDATA/rawdata/mksrf_navyoro_20min.nc'
Points to the orography dataset used to derive the model's land mask
in offline mode. The environment variable $CSMDATA is
explained in 3.1.1.
MKSRF_FVEGTYP, MKSRF_FSOITEX, MKSRF_FSOICOL, MKSRF_FLANWAT, MKSRF_FGLACIER, MKSRF_FURBAN, and MKSRF_FLAI
Specify the raw (usually high resolution) input datasets used to
create the model surface dataset.
MKSRF_OFFLINE_EDGES, MKSRF_OFFLINE_EDGEN, MKSRF_OFFLINE_EDGEE, and MKSRF_OFFLINE_EDGEW
Must be defined for the desired model regional domain. The units are
degrees north for edges and edgen and degrees east for edgee and
edgew.