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User's Guide to NCAR CAM2.0


2. Using CAM2.0

    2.4 Example Namelists

2.4.8 Example 8 -- Debugging Run

The following namelist can be utilized when the user wants to examine model behavior on a nstep by step basis. The primary history file is not archived to the Mass Store. The disk copy will not be deleted and can be analyzed. Only 10 timesteps will be executed, with history data written every timestep. Output will be line-buffered to ensure printout will be dumped each timestep. For efficiency, no restart data will be written.

To obtain this namelist, the user may invoke build-namelist with command line arguments. However, since the number of command line arguments for this case are numerous, an easier solution is for the user to first create a namelist file, namelist_input, with the following contents:

 &camexp
 caseid = 'run08'
 nrefrq = 0
 mss_irt = 0
 linebuf = .TRUE.
 ndens = 1
 mfilt = 10
 nhtfrq = 1
 nelapse= 10
 /

The user may then invoke build-namelist as follows: 


 % setenv CSMDATA /data
 % build-namelist -infile namelist_input

The user should invoke this command from the same directory from which configure was invoked.

 &camexp
 caseid = 'run08'
 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
 nrefrq = 0
 mss_irt = 0
 linebuf = .TRUE.
 ndens = 1
 mfilt = 10
 nhtfrq = 1
 nelapse= 10
 iyear_ad = 1950
 /

 &clmexp
 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'
 /

MSS_IRT

When MSS_IRT=0, output history and restart files are only written to local disk and not archived to the Mass Store.

NDENS

History output data is in NetCDF double precision (NDENS=1) in order to maintain full accuracy.

MFILT

10 time samples of unpacked data will be written to each history file.

LINEBUF

Printout will be flushed with each log output line generated.

NREFRQ

A value of zero prevents restart files from being written.

NHTFRQ

History data is written every timestep.

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$Name: $ $Revision: 1.1 $ $Date: 2004/06/08 02:57:22 $ $Author: jmccaa $