Change experimental setup

A method how to change several experimental setup is explained.

In order to change the settings of experiments, edit a NAMELIST file, and specify the file to "-N" option of an execution. Here, it is explained by using a configuration file (namelist file), dcpam_hs94_T21L20.nml which is used in Dry atmosphere dynamical core experiment by Held and Suarez (1994).

A NAMELIST group name "&xxxxxx_nml" is managed by "xxxxxx" module. List of NAMELIST group names managed in dcpam5 is dcpam5 NAMELIST. See this manual for details.

1. Change resolution
2. Change integration period
3. Change constants of planet and planetary atmosphere
4. Change output settings
5. Change initial (restart) data file name
6. References

Change resolution

Under construction

Change integration period

Under construction

Change constants of planet and planetary atmosphere

Under construction

Change output settings

Under construction

Change initial (restart) data file name

In order to input initial data or restart data from a file, edit NAMELIST file as follows.

&restart_file_io_nml
  InputFile = 'init_T21L20.nc',    ! filename of input initial/restart data
            :
/

Specify a filename of initial data or restart data to "InputFile".

After change of NAMELIST file, start an experiment with -N or --namelist option and the NAMELIST file as follows.

$ ./dcpam_main -N=dcpam_hs94_T21L20.nml | tee hs94.log

Starting an experiments, following data input messages may be displayed. Confirm them.

|*** MESSAGE [restart_file_io] ***  ----- Initialization Messages -----
|*** MESSAGE [restart_file_io] ***  Input::
|*** MESSAGE [restart_file_io] ***    InputFile  = init_T21L20.nc
|*** MESSAGE [restart_file_io] ***  Output::
|*** MESSAGE [restart_file_io] ***    OutputFile = restart.nc
|*** MESSAGE [restart_file_io] ***    IntTime    = 100. [day]
|*** MESSAGE [restart_file_io] ***  -- version = ...

r |ikawa Exp $

|*** MESSAGE [HistoryGetDouble3] ***  Input init_T21L20.nc@U,time=0.
|*** MESSAGE [HistoryGetDouble3] ***  Input init_T21L20.nc@V,time=0.
|*** MESSAGE [HistoryGetDouble3] ***  Input init_T21L20.nc@Temp,time=0.
|*** MESSAGE [HistoryGetDouble3] ***  Input init_T21L20.nc@QVap,time=0.
|*** MESSAGE [HistoryGetDouble2] ***  Input init_T21L20.nc@Ps,time=0.
|*** MESSAGE [restart_file_io] ***  Initial data (not restart data) is input from a data file "init_T21L20.nc". *

B | (t-dt) and *N (t) are same.

References

• Held, I. M., and M. J. Suarez, 1994: A proposal for the intercomparison of the dynamical cores of atmospheric general circuation models, Bull. Am. Meteor. Soc., 75, 1825--1830.

DCPAM Development Group / GFD Dennou Staff