Mars experiment

A method to perform a Mars experiment is described.

Following physical processes are used in this experiment.

• Radiation (improved and/or simplified version of Takahashi et al., 2003; 2006)
• Vertical diffusion (Mellor and Yamada, 1974, level 2)
• Cumulus parameterization: Convective adjustment scheme (Manabe et al., 1965)
• Large scale condensation
• Bucket model

1. Overview
2. Preparation of a directory for an experiment
3. Preparation of additional data
4. Run the experiment

Overview

This experiment requires data of distribution of surface properties and radiative property. So, the experiment is performed with the following 4 steps:

• Preparation of directory for experiments
• Preparation of initial condition
• Preparation of additional data for experiments
• Execution of experiments

Preparation of a directory for an experiment

Here, we perform an experiment in practice/Mars-exp directory. Please create the directory and enter there as follows:

$ cd practice
$ mkdir Mars-exp
$ cd Mars-exp

Then, executable files and configuration files are copied as follows:

$ cp ../../src/main/dcpam_main ../../src/main/init_data ../../src/main/sst_data .
$ cp ../../src/sample_nml/*.nml .

Note that you can perform an experiment in any directory by using executable files and configuration (namelist) files.

Preparation of additional data

This experiment requires additional data, sea surface temperature, surface properties, sea ice density, and ozone distribution. Those data are prepared at following site.

• sample data

Please download "sp_for_Mars_T21_MGS+MGS+cons.nc" and "lnactbl15m_2006-07-13.nc" from above site, and place those files at experimental directory.

Run the experiment

At the last, run a experiment using "dcpam_main" and "dcpam_M_T21L32.nml". Resolution is T21L32. Integration time is 2 days. A restart data file, a restart data file of surface data, and some history data files are output.

$ ./dcpam_main -N=dcpam_M_T21L32.nml | tee Mars.log

If initial data, surface data, settings of experiments want to be changed, edit "init_data_M_T21L32.nml", "dcpam_M_T21L32.nml".

DCPAM Development Group / GFD Dennou Staff