Ocean temperature thresholds for Last Interglacial West Antarctic Ice Sheet collapse
The West Antarctic Ice Sheet (WAIS) is considered the major contributor to global sea level rise in the Last Interglacial (LIG) and potentially in the future. Exposed fossil reef terraces suggest sea levels in excess of 7 meters in the last warm era, of which probably not much more than 2 meters are...
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Online Access: | https://epic.awi.de/id/eprint/39767/ https://epic.awi.de/id/eprint/39767/1/grl53983.pdf http://onlinelibrary.wiley.com/doi/10.1002/2016GL067818/pdf https://hdl.handle.net/10013/epic.46901 https://hdl.handle.net/10013/epic.46901.d001 |
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ftawi:oai:epic.awi.de:39767 2024-09-15T17:41:13+00:00 Ocean temperature thresholds for Last Interglacial West Antarctic Ice Sheet collapse Sutter, Johannes Gierz, Paul Grosfeld, Klaus Thoma, Malte Lohmann, Gerrit 2016-01-28 application/pdf https://epic.awi.de/id/eprint/39767/ https://epic.awi.de/id/eprint/39767/1/grl53983.pdf http://onlinelibrary.wiley.com/doi/10.1002/2016GL067818/pdf https://hdl.handle.net/10013/epic.46901 https://hdl.handle.net/10013/epic.46901.d001 unknown Wiley https://epic.awi.de/id/eprint/39767/1/grl53983.pdf https://hdl.handle.net/10013/epic.46901.d001 Sutter, J. , Gierz, P. orcid:0000-0002-4512-087X , Grosfeld, K. orcid:0000-0001-5936-179X , Thoma, M. orcid:0000-0002-4033-3905 and Lohmann, G. orcid:0000-0003-2089-733X (2016) Ocean temperature thresholds for Last Interglacial West Antarctic Ice Sheet collapse , Geophysical Research Letters . doi:10.1002/2016GL067818 <https://doi.org/10.1002/2016GL067818> , hdl:10013/epic.46901 EPIC3Geophysical Research Letters, Wiley, ISSN: 0094-8276 Article isiRev 2016 ftawi https://doi.org/10.1002/2016GL067818 2024-06-24T04:13:16Z The West Antarctic Ice Sheet (WAIS) is considered the major contributor to global sea level rise in the Last Interglacial (LIG) and potentially in the future. Exposed fossil reef terraces suggest sea levels in excess of 7 meters in the last warm era, of which probably not much more than 2 meters are considered to originate from melting of the Greenland Ice Sheet. We simulate the evolution of the Antarctic Ice Sheet during the LIG with a 3D thermomechanical ice sheet model forced by an atmosphere ocean general circulation model (AOGCM). Our results show that high LIG sea levels, cannot be reproduced with the atmosphere-ocean forcing delivered by current AOGCMs. However, when taking reconstructed Southern Ocean temperature anomalies of several degrees, sensitivity studies indicate a Southern Ocean temperature anomaly threshold for total WAIS collapse of 2-3∘C, accounting for a sea level rise of 3-4 meters during the LIG. Potential future Antarctic Ice Sheet dynamics range from a moderate retreat to a complete collapse, depending on rate and amplitude of warming. Article in Journal/Newspaper Antarc* Antarctic Greenland Ice Sheet Southern Ocean Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Geophysical Research Letters 43 6 2675 2682 |
institution |
Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The West Antarctic Ice Sheet (WAIS) is considered the major contributor to global sea level rise in the Last Interglacial (LIG) and potentially in the future. Exposed fossil reef terraces suggest sea levels in excess of 7 meters in the last warm era, of which probably not much more than 2 meters are considered to originate from melting of the Greenland Ice Sheet. We simulate the evolution of the Antarctic Ice Sheet during the LIG with a 3D thermomechanical ice sheet model forced by an atmosphere ocean general circulation model (AOGCM). Our results show that high LIG sea levels, cannot be reproduced with the atmosphere-ocean forcing delivered by current AOGCMs. However, when taking reconstructed Southern Ocean temperature anomalies of several degrees, sensitivity studies indicate a Southern Ocean temperature anomaly threshold for total WAIS collapse of 2-3∘C, accounting for a sea level rise of 3-4 meters during the LIG. Potential future Antarctic Ice Sheet dynamics range from a moderate retreat to a complete collapse, depending on rate and amplitude of warming. |
format |
Article in Journal/Newspaper |
author |
Sutter, Johannes Gierz, Paul Grosfeld, Klaus Thoma, Malte Lohmann, Gerrit |
spellingShingle |
Sutter, Johannes Gierz, Paul Grosfeld, Klaus Thoma, Malte Lohmann, Gerrit Ocean temperature thresholds for Last Interglacial West Antarctic Ice Sheet collapse |
author_facet |
Sutter, Johannes Gierz, Paul Grosfeld, Klaus Thoma, Malte Lohmann, Gerrit |
author_sort |
Sutter, Johannes |
title |
Ocean temperature thresholds for Last Interglacial West Antarctic Ice Sheet collapse |
title_short |
Ocean temperature thresholds for Last Interglacial West Antarctic Ice Sheet collapse |
title_full |
Ocean temperature thresholds for Last Interglacial West Antarctic Ice Sheet collapse |
title_fullStr |
Ocean temperature thresholds for Last Interglacial West Antarctic Ice Sheet collapse |
title_full_unstemmed |
Ocean temperature thresholds for Last Interglacial West Antarctic Ice Sheet collapse |
title_sort |
ocean temperature thresholds for last interglacial west antarctic ice sheet collapse |
publisher |
Wiley |
publishDate |
2016 |
url |
https://epic.awi.de/id/eprint/39767/ https://epic.awi.de/id/eprint/39767/1/grl53983.pdf http://onlinelibrary.wiley.com/doi/10.1002/2016GL067818/pdf https://hdl.handle.net/10013/epic.46901 https://hdl.handle.net/10013/epic.46901.d001 |
genre |
Antarc* Antarctic Greenland Ice Sheet Southern Ocean |
genre_facet |
Antarc* Antarctic Greenland Ice Sheet Southern Ocean |
op_source |
EPIC3Geophysical Research Letters, Wiley, ISSN: 0094-8276 |
op_relation |
https://epic.awi.de/id/eprint/39767/1/grl53983.pdf https://hdl.handle.net/10013/epic.46901.d001 Sutter, J. , Gierz, P. orcid:0000-0002-4512-087X , Grosfeld, K. orcid:0000-0001-5936-179X , Thoma, M. orcid:0000-0002-4033-3905 and Lohmann, G. orcid:0000-0003-2089-733X (2016) Ocean temperature thresholds for Last Interglacial West Antarctic Ice Sheet collapse , Geophysical Research Letters . doi:10.1002/2016GL067818 <https://doi.org/10.1002/2016GL067818> , hdl:10013/epic.46901 |
op_doi |
https://doi.org/10.1002/2016GL067818 |
container_title |
Geophysical Research Letters |
container_volume |
43 |
container_issue |
6 |
container_start_page |
2675 |
op_container_end_page |
2682 |
_version_ |
1810487361771929600 |