Add FastIsostasy coupling setup for ISMIP7 AIS test case - #970
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July 21, 2026 19:07
This commit adds functionality to set up coupled MALI-FastIsostasy simulations in the
ISMIP7 AIS test case, following the same pattern as the existing Sea Level Model (SLM)
integration.
New files:
- create_fastiso_mapping_files.py: Step class for generating mapping files
* Includes create_ismip7_grid_file() function copied from MPAS-Tools
* Creates MALI -> FastIsostasy mapping (conserve method)
* Creates FastIsostasy -> MALI mapping (bilinear method)
Modified files:
- __init__.py: Added CreateFastIsoMappingFiles step when fastisostasy=true
- set_up_experiment.py: Added FastIsostasy configuration and validation
- ismip7_ais.cfg: Added fastisostasy, fastiso_res_km, and icesheet options
- ismip7_ais_test.cfg: Added same configuration options
Configuration options:
- fastisostasy (bool): Enable FastIsostasy coupling
- fastiso_res_km (int): Grid resolution in km (2, 4, 8, or 16 for AIS)
- icesheet (str): Ice sheet identifier ('AIS' or 'GrIS')
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This PR adds functionality to set up coupled MALI-FastIsostasy simulations in the ISMIP7 AIS test case, following the same pattern as the existing Sea Level Model (SLM) integration.
Remaining ask before merging: namelist file for FastIsostasy with appropriate setting for Antarctica
Checklist
--- test results ---
The signs of bedrock change and thickness change seem reasonable (ice thickening → bedrock subsiding & ice thinning → bedrock uplifting)