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Towards a dynamic Greenland Ice Sheet component in E3SM

Presentation Date
Wednesday, August 7, 2024 at 2:10pm - Wednesday, August 7, 2024 at 2:30pm
Authors

Lead Presenter

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Abstract

Ice loss from the Greenland Ice Sheet increases global sea level and impacts ocean and sea ice conditions in the Atlantic and Arctic Oceans.  While Earth system models have historically ignored ice sheet changes due to computational expense and technical challenges, substantial progress has been made through the efforts of the FAnSSIE SciDAC project and E3SM Polar/Ice Teams towards dynamic ice-sheet components.  Here we report on progress towards a dynamic Greenland Ice Sheet in E3SM along three parallel tracks - 1. development and validation of Greenland Ice Sheet projections using E3SM’s ice-sheet component, MALI, in a standalone configuration, 2. coupling of MALI to snow and firn processes in ELM, and 3. coupling MALI Greenland to ocean processes in MPAS-Ocean. The MALI Greenland configuration uses a regionally-refined mesh ranging from 1 to 10 km resolution and has been calibrated to broadly reproduce observations of ice flow through Greenland’s narrow outlet glaciers.  We show standalone projections of Greenland Ice Sheet mass change to 2100 forced by CMIP5 models as a comparative reference against forthcoming coupled E3SM projections with a dynamic Greenland Ice Sheet.  We also introduce in-development land/ice-sheet and ocean/ice-sheet coupling for Greenland and show preliminary results for coupled interactions.

Presentation File(s)
Category
High Latitude
Strengthening EESM Integrated Modeling Framework – Towards a Digital Earth
Methods in Model Integration, Hierarchical Modeling, Model Complexity
Funding Program Area(s)
Additional Resources:
NERSC (National Energy Research Scientific Computing Center)