Experiment for Earth-like planet

A method to perform an experiment for Earth-like planet is described.

Following physical processes are used in this experiment.

• Radiation (...)
• 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
5. References

Overview

This experiment requires data of distribution of sea surface temperature, surface properties, sea ice density, and ozone. 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

Move "practice" directory:

$ cd practice

In the directory, execute 'make' command. The execution files and the NAMELIST files will be automatically copied. Input directory name first of all after inputting 'make' command. (It is assumed "Earth-exp" in the following example). Input 'Enter' to the question after that.

$ make

****** Setup a directory for a experiment ******

  Enter directory name [testXX]: Earth-exp
  Directory in which executable files are prepared
    [../src/main]: 
          :

Move the directory

$ cd Earth-exp

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 "sst_amipII_bc_clim_T021.nc", "sp_for_Earth_T021.nc", "sic_amipII_bc_clim_T021.nc", and "O3_CMIP5_climatology_zonalmean_T021.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_E_T21L22.nml". Resolution is T21L22, time step is 30 minutes. 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_E_T21L22.nml | tee Earth.log

If initial data, surface data, settings of experiments want to be changed, edit "init_data_T21L22.nml", "dcpam_E_T21L22.nml".

References

• Manabe, S., J. Smagorinsky, and R. F. Strickler, 1965: Simulated climatology of a general circulation model with a hydrologic cycle, Mon. Wea. Rev., 93, 769--798.
• Mellor, G. L., and T. Yamada, 1974: A hierarchy of turbulence closure models for planetary boundary layers, J. Atmos. Sci., 31, 1791--1806.

DCPAM Development Group / GFD Dennou Staff