(Redirected from ACCESS-ESM)

This page describes the different configurations of ACCESS-ESM 1.5 currently available and how to access them.

ESM stands for Earth System Model. ACCESS-ESM is a coupled model with the following components:

Submodel Model Version Notes
Atmosphere UM 7.3
Land Surface CABLE Part of UM
Sea Ice CICE
Ocean MOM 5
Coupler OASIS-MCT 3

Payu Experiments

We strongly recommend that you run ACCESS-ESM 1.5 using the payu driver. CSIRO is running the CMIP6 submission runs using a setup based on KSH scripts. The CMS team is working to adapt those configurations to payu.

Please contact the CMS team if you would like a configuration that isn't currently available in payu or if you have any problems running a ACCESS-ESM 1.5 simulation with payu.

Model Spinup

If starting from scratch the model will take some time to spin up. It's recommended that you branch off of piControl, which has already been spun up, rather than starting a run from scratch (except for SSP runs, which will branch from historical)

The script '' in the Payu experiment directory will set up restart files based on an existing run

Using Payu

1. Load the Conda environment to access Payu

module use /g/data/hh5/public/modules
module load conda/analysis3

2. Download the Payu experiment configuration

git clone

3. Edit and run the warm-start script if needed


4. Run the model

payu run

Each 'payu run' submission will run the model for one model year. You can run multiple years with e.g. 'payu run -n 25' - Payu will automatically resubmit the run after each year has finished.

We recommend inspecting the model output after running for a year or so to make sure it's behaving as desired, especially if it's a non-standard configuration


Post-processing scripts to convert atmosphere output to NetCDF format and move the output to /g/data are available at This can be run at any stage of the run, and will only process files that haven't yet been archived.

Publication of runs to ESGF requires further processing to put the data in CMOR format. We recommend working with CSIRO for this so all ACCESS runs are consistent, contact us at for more information.

Experiment Details


You can download the configuration by typing

$ git clone

The website of the configuration also contains detailed instructions on how to run the model.

Default configuration, based off CSIRO ksh scripts

PMIP4 Runs


Currently contains two models from the PMIP4 setting: Last Interglacial and Mid-Holocene.

Please refer to the main page to know where to download the configurations from.

Last Interglacial

Science Contacts: Nick Yeung, Laurie Menviel

Note: In addition to changed MMRs for certain gases, it also needs an updated UM build with different orbital parameters. This updated UM build is on gadi at



Science Contacts: Josephine Brown

Note: In addition to changed MMRs for certain trace gasses, it also needs and updated UM build with different orbital parameters. This updated UM build is at



CSIRO is running the ACCESS-ESM model using ksh shell scripts. If you need to know, you can look here.