USAP-DC

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OPP-PRF: High-resolution Nested Antarctic Ice Sheet Modeling to Reconcile Marine and Terrestrial Geologic Data Short Title: Nested Antarctic ice sheet modeling to reconcile geologic data Start Date: 2022-01-01 End Date: 2023-12-31 Description/Abstract This project combines numerical simulations and geologic data to explore fundamental knowledge gaps regarding the interpretation and use of marine and terrestrial datasets. This work will produce an ensemble of continent-wide coupled ice sheet and glacial isostatic adjustment simulations, constrained with comprehensive existing geologic data, to reproduce a history of deglacial Antarctic Ice Sheet evolution that is compatible with the geologic record as well as glaciologically and gravitationally self-consistent. Comparison between simulations and data is improved through high-resolution nested ice sheet modeling techniques, which provide unprecedented context for exposure age data generally located in regions of complex topography. Numerical simulations will be performed with systematically varied parameters and boundary conditions, and can thus support an investigation of (1) chronological mismatches between terrestrial thinning and marine ice sheet retreat during the mid-Holocene, and (2) how marine grounding-line dynamics are propagated upstream to coastal outlet glaciers and further interior under a variety of different scenarios. Personnel Person Role Halberstadt, Anna Ruth Investigator and contact Funding Post Doc/Travel Award # 2138556 AMD - DIF Record(s) USAP-2138556_1 Data Management Plan None in the Database Product Level: 0 (raw data) Publications Halberstadt, A. R. W., Balco, G., Buchband, H., & Spector, P. (2022). Cosmogenic-nuclide data from Antarctic nunataks can constrain past ice sheet sensitivity to marine ice margin instabilities. (doi:10.5194/tc-2022-213) Halberstadt, A. R. W., Balco, G., Buchband, H., & Spector, P. (2023). Cosmogenic-nuclide data from Antarctic nunataks can constrain past ice sheet instabilities. The Cryosphere, 17(4), 1623–1643. (doi:10.5194/tc-17-1623-2023) Keywords Amd/Us Antarctic Ice Sheet GLACIERS/ICE SHEETS Platforms and Instruments MODELS