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esm-flat10

Warning

The ACCESS-ESM1.6 esm-flat10 experiment does not have a released and maintained configuration. These notes describe how the CMIP7 experiment was set up and are for reference only. If you would like to run an esm-flat10 experiment with the latest configuration updates, please create a help request on the ACCESS Hive Forum.

The esm-flat10 experiment simulates the climate under constant anthropogenic emissions of 10PgC/year using a fully interactive carbon cycle, with preindustrial values used for all other atmospheric forcings. This experiment is run for the CMIP7 esm-flat10 experiment.

The experimental setup matches commit 2dc195a from the esm-piControl configuration with changes for prescribing the flat CO2 emissions and the restart file used.

Inputs

The esm-flat10 experiment uses the same input files as the esm-piControl configuration, with changes for specifying CO2 emissions and a different initial condition.

Atmosphere:

The following file is used to provide the constant CO2 emissions to the atmosphere model:

  • CO2_fluxes_flat10.anc: Constant gridded CO2 emissions in units kg(CO2) m-2 s-1, totalling 10Pg(C) year-1.

Restart

The esm-flat10 experiment uses the restart from the esm-piControl experiment with calendar year 201.

Key settings

The following settings are used to read the CO2 emissions from the input file. Differences are shown with respect to the esm-piControl configuration:

atmosphere/um_env.yaml

+CO2EMITS: INPUT/CO2_fluxes_flat10.anc
The above setting points the model to the CO2 emissions ancillary file in the payu work directory.

atmosphere/namelists

+ L_CO2_EMITS= .TRUE.,
...
+ &UPANCA ANC_REF_NO=78, PERIOD=4, INTERVAL=1 /
The above settings activate the CO2 emissions fluxes and control the linear interpolation of the CO2 emissions ancillary data. See the esm-historical configuration for details on controling the linear interpolation.