Coupling framework (1.0) for the Úa (2023b) ice sheet model and the FESOM-1.4 z-coordinate ocean model in an Antarctic domain
The rate at which the Antarctic Ice Sheet loses mass is to a large degree controlled by ice-ocean interactions underneath small ice shelves, with the most sensitive regions concentrated in even smaller areas near grounding lines and local pinning points. Sufficient horizontal resolution is key to re...
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Copernicus Publications
2024
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00072874 2024-05-19T07:32:32+00:00 Coupling framework (1.0) for the Úa (2023b) ice sheet model and the FESOM-1.4 z-coordinate ocean model in an Antarctic domain Richter, Ole Timmermann, Ralph Gudmundsson, G. Hilmar De Rydt, Jan 2024-04 electronic https://doi.org/10.5194/egusphere-2024-648 https://noa.gwlb.de/receive/cop_mods_00072874 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00071066/egusphere-2024-648.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2024-648/egusphere-2024-648.pdf eng eng Copernicus Publications https://doi.org/10.5194/egusphere-2024-648 https://noa.gwlb.de/receive/cop_mods_00072874 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00071066/egusphere-2024-648.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2024-648/egusphere-2024-648.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2024 ftnonlinearchiv https://doi.org/10.5194/egusphere-2024-648 2024-04-22T23:50:58Z The rate at which the Antarctic Ice Sheet loses mass is to a large degree controlled by ice-ocean interactions underneath small ice shelves, with the most sensitive regions concentrated in even smaller areas near grounding lines and local pinning points. Sufficient horizontal resolution is key to resolving critical ice-ocean processes in these regions, but difficult to afford in large-scale models used to predict the coupled response of the entire Antarctic Ice Sheet and the global ocean to climate change. In this study we describe the implementation of a framework that couples the ice sheet flow model Úa with the Finite Element Sea Ice Ocean Model (FESOM-1.4) in a configuration using depth-dependent vertical coordinates. The novelty of this approach is the use of horizontally unstructured grids in both model components, allowing us to resolve critical processes directly, while keeping computational demands within the range of feasibility. We use the Marine Ice Sheet–Ocean Model Intercomparison Project framework to verify that ice retreat and readvance is reliably simulated, and inaccuracies in mass, heat and salt conservation are small compared to the forcing signal. Further, we demonstrate the capabilities of our approach for a global ocean/Antarctic Ice Sheet domain. In a 39-year hindcast simulation (1979–2018) we resolve retreat behaviour of Pine Island Glacier, a known challenge for coarser resolution models. We conclude that Úa-FESOM is well suited to improve predictions of the Antarctic Ice Sheet evolution over centennial time scales. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Ice Shelves Pine Island Glacier Sea ice Niedersächsisches Online-Archiv NOA |
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English |
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article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Richter, Ole Timmermann, Ralph Gudmundsson, G. Hilmar De Rydt, Jan Coupling framework (1.0) for the Úa (2023b) ice sheet model and the FESOM-1.4 z-coordinate ocean model in an Antarctic domain |
topic_facet |
article Verlagsveröffentlichung |
description |
The rate at which the Antarctic Ice Sheet loses mass is to a large degree controlled by ice-ocean interactions underneath small ice shelves, with the most sensitive regions concentrated in even smaller areas near grounding lines and local pinning points. Sufficient horizontal resolution is key to resolving critical ice-ocean processes in these regions, but difficult to afford in large-scale models used to predict the coupled response of the entire Antarctic Ice Sheet and the global ocean to climate change. In this study we describe the implementation of a framework that couples the ice sheet flow model Úa with the Finite Element Sea Ice Ocean Model (FESOM-1.4) in a configuration using depth-dependent vertical coordinates. The novelty of this approach is the use of horizontally unstructured grids in both model components, allowing us to resolve critical processes directly, while keeping computational demands within the range of feasibility. We use the Marine Ice Sheet–Ocean Model Intercomparison Project framework to verify that ice retreat and readvance is reliably simulated, and inaccuracies in mass, heat and salt conservation are small compared to the forcing signal. Further, we demonstrate the capabilities of our approach for a global ocean/Antarctic Ice Sheet domain. In a 39-year hindcast simulation (1979–2018) we resolve retreat behaviour of Pine Island Glacier, a known challenge for coarser resolution models. We conclude that Úa-FESOM is well suited to improve predictions of the Antarctic Ice Sheet evolution over centennial time scales. |
format |
Article in Journal/Newspaper |
author |
Richter, Ole Timmermann, Ralph Gudmundsson, G. Hilmar De Rydt, Jan |
author_facet |
Richter, Ole Timmermann, Ralph Gudmundsson, G. Hilmar De Rydt, Jan |
author_sort |
Richter, Ole |
title |
Coupling framework (1.0) for the Úa (2023b) ice sheet model and the FESOM-1.4 z-coordinate ocean model in an Antarctic domain |
title_short |
Coupling framework (1.0) for the Úa (2023b) ice sheet model and the FESOM-1.4 z-coordinate ocean model in an Antarctic domain |
title_full |
Coupling framework (1.0) for the Úa (2023b) ice sheet model and the FESOM-1.4 z-coordinate ocean model in an Antarctic domain |
title_fullStr |
Coupling framework (1.0) for the Úa (2023b) ice sheet model and the FESOM-1.4 z-coordinate ocean model in an Antarctic domain |
title_full_unstemmed |
Coupling framework (1.0) for the Úa (2023b) ice sheet model and the FESOM-1.4 z-coordinate ocean model in an Antarctic domain |
title_sort |
coupling framework (1.0) for the úa (2023b) ice sheet model and the fesom-1.4 z-coordinate ocean model in an antarctic domain |
publisher |
Copernicus Publications |
publishDate |
2024 |
url |
https://doi.org/10.5194/egusphere-2024-648 https://noa.gwlb.de/receive/cop_mods_00072874 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00071066/egusphere-2024-648.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2024-648/egusphere-2024-648.pdf |
genre |
Antarc* Antarctic Ice Sheet Ice Shelves Pine Island Glacier Sea ice |
genre_facet |
Antarc* Antarctic Ice Sheet Ice Shelves Pine Island Glacier Sea ice |
op_relation |
https://doi.org/10.5194/egusphere-2024-648 https://noa.gwlb.de/receive/cop_mods_00072874 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00071066/egusphere-2024-648.pdf https://egusphere.copernicus.org/preprints/2024/egusphere-2024-648/egusphere-2024-648.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/egusphere-2024-648 |
_version_ |
1799470620236316672 |