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  Coupling the freshwater feedback into EC-Earth using the ice sheet model BISICLES

Donnelly, C., van der Linden, E., Jüling, A., Drijfhout, S., Payne, A. (2023): Coupling the freshwater feedback into EC-Earth using the ice sheet model BISICLES, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4381

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021812 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021812_1
Genre: Conference Paper

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 Creators:
Donnelly, Claire1, Author
van der Linden, Eveline1, Author
Jüling, André1, Author
Drijfhout, Sybren1, Author
Payne, Antony1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Abstract: Recent observations show that the Antarctic ice sheet is losing mass at an accelerating pace and that this is projected to accelerate in the coming decades, contributing significantly to sea level rise. Ice sheet contributions to sea level rise remains one of the largest sources of uncertainty to future projections. However, so far ice sheets are not included in the majority of climate models used in CMIP5/CMIP6 to make sea level projections. Therefore, to accurately simulate future climate and sea level rise, ice sheet models need to be included in Earth System Models. Here, ocean temperatures from EC-Earth with CMIP6 forcing are used to calculate basal melt forcing for BISICLES. Ocean temperatures are averaged over five oceanic sectors of Antarctica and three different depth ranges. Then, a quadratic basal melt parameterisation calibrated on sea level contribution derived from observation-based changes in grounding line ice discharge is applied as forcing for BISICLES. Based on this methodology, freshwater feedback was then coupled asynchronously into EC-Earth at one-year intervals. We find that the choice of calibration and ocean temperature depth range significantly impacts the basal melt calculation and additionally show initial results from the freshwater feedback coupling.

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Language(s): eng - English
 Dates: 2023-07-112023-07-11
 Publication Status: Finally published
 Pages: -
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 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-4381
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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
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Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
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