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2.4.1 Example 1 -- T42 One Day Initial Run
The following namelist results in a one day T42 initial run beginning on
September 1st and using Eulerian dynamics (the default). To obtain
this namelist, build-namelist may be invoked as follows
in the same directory from which configure was invoked:
% setenv CSMDATA /data
We again note that it is assumed that the root directory for
the dataset distribution is /data.
caseid = 'camrun'
absems_data = '/data/atm/cam2/rad/abs_ems_factors_fastvx.052001.nc'
ncdata = '/data/atm/cam2/inic/gaus/cami_0000-09-01_64x128_T42_L26_c020514.nc'
bndtvs = '/data/atm/cam2/sst/sst_HadOIBl_bc_64x128_clim_c020411.nc'
bndtvo = '/data/atm/cam2/ozone/noaao3.1990.21999.nc'
nsrest = 0
iyear_ad = 1950
fpftcon = '/data/lnd/clm2/pftdata/pft-physiology'
fsurdat = '/data/lnd/clm2/srfdata/cam/clms_64x128_c020514.nc'
finidat = '/data/lnd/clm2/inidata/cam/clmi_0000-09-01_64x128_T42_c020514.nc'
The case identifier for this run is 'camrun'. It appears in the model
log output and is utilized to construct the path names for
archiving history and restart files. CASEID must be 32 (or fewer)
valid UNIX filename characters.
Specifies the water vapor absorptivity/emissivity dataset required by
the radiation model. See "Model
Input Datasets" .
Specifies the initial conditions dataset. See
"Model Input Datasets" .
Specifies the time-variant NetCDF sea surface temperature (SST) dataset.
See "Model Input Datasets" .
Specifies the time-variant ozone dataset.
See "Model Input Datasets" .
Setting NSREST = 0 requests an initial run. Continuation (restart and
branch) runs may also be specified via this variable. See Examples
3 and 5 for more
information on continuation runs.
Setting NELAPSE to -1 specifies that the run should execute for one
Specifies the earth's orbital parameters for 1950 AD. See
Example 4 or Table
2.4 for more information on how to set variable. The year
1950 is used to most closely match the orbital parameters of previous
releases of CCM3.
Specifies the CLM2.0 surface dataset (containing time-invariant
description of plant-types, of soils, etc.). If this namelist item is
not specified, CLM2.0 will generate a surface dataset at runtime assuming
that the high resolution surface type datasets are specified
by the appropriate clmexp namelist variables (See
This, however, is a time-consuming process. We recommend, where
possible, to use surface datasets that already exist.
Specifies the CLM2.0 spun up initial conditions dataset. This dataset
provides time variant CLM2.0 data (such as soil water amounts,
temperatures, etc). If this file is not specified, CLM2.0 will create
a "physically reasonable" set of initial conditions. However, starting
from such conditions requires several simulation years to spin-up to
equilibrium conditions. It is recommended to use previous datasets if
available. By default, CLM2.0 creates initial condition filesat
yearly, so previous simulations could be used to start new
simulations (as long as the CLM2.0 surface dataset is the same).
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$Name: $ $Revision: 1.1 $ $Date: 2004/06/08 02:57:21 $ $Author: jmccaa $