CESM

Model description

The Community Earth System Model (CESM) is a fully-coupled, community, global climate model that provides state-of-the-art computer simulations of the Earth's past, present, and future climate states. The CESM project is supported primarily by the National Science Foundation (NSF). Administration of the CESM is maintained by the Climate and Global Dynamics Laboratory (CGD) at the National Center for Atmospheric Research (NCAR).

For the latest CESM release and CESM2 components see CESM2 documentation.

Downloading CESM2

Following CESM2 Quick Start Guide

• Clone the repository

git clone -b release-cesm2.1.0 https://github.com/ESCOMP/cesm.git my_cesm_sandbox

This will create a directory my_cesm_sandbox/ in your current working directory.

• Go into the newly created CESM repository

cd my_cesm_sandbox

• Determine what version of CESM you want. To see what versions of CESM2 are available,

git tag --list 'release-cesm2*'

• Checkout a specific CESM release tag type, for example CESM2.1.1:

git checkout release-cesm2.1.1

• Finally, to checkout all the individual model components, run the script manage_externals/checkout_externals. Note to HYDRA users: This script requires Python 2.7.x (installed in HYDRA /share/anaconda2/bin/) to run, so we need to change the Python interpreter in the header of manage_externals/checkout_externals. To do so:

sed -i -e 's!/usr/bin/env python!/share/anaconda2/bin/python!' checkout_externals ./manage_externals/checkout_externals

Now run the script:

./manage_externals/checkout_externals