Coupled Ice Sheet - Climate simulation
Supplement to paper Heinrich events show two-stage climate response in transient glacial simulations in submission to Climate of the past Abstract: Heinrich events are among the dominant modes of glacial climate variability. During these events, massive iceberg armadas were released by the Laurentid...
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ftdatacite:10.5446/35259 2023-05-15T16:35:31+02:00 Coupled Ice Sheet - Climate simulation Ziemen, Florian Andreas 2018 https://dx.doi.org/10.5446/35259 https://av.tib.eu/media/35259 unknown Copernicus Publications Earth Sciences ice sheets climate glacial heinrich events simulation modeling Audiovisual Video Abstract article MediaObject 2018 ftdatacite https://doi.org/10.5446/35259 2021-11-05T12:55:41Z Supplement to paper Heinrich events show two-stage climate response in transient glacial simulations in submission to Climate of the past Abstract: Heinrich events are among the dominant modes of glacial climate variability. During these events, massive iceberg armadas were released by the Laurentide Ice Sheet, sailed across the Atlantic, and caused large-scale climate changes. We study these events in a fully coupled complex ice sheet–climate model with synchronous coupling between ice sheets and oceans. The ice discharges occur as internal variability of the model with a recurrence period of 5 kyr, an event duration of 1–1.5 kyr, and a peak discharge rate of about 50 mSv, roughly consistent with reconstructions. The climate response shows a two-stage behavior, with freshwater release effects dominating the surge phase and ice-sheet elevation effects dominating in the post-surge phase. As a direct response to the freshwater discharge during the surge phase, the deepwater formation in the North Atlantic decreases and the North Atlantic deepwater cell weakens by 3.5 Sv. With the reduced oceanic heat transport, the surface temperatures across the North Atlantic decrease, and the associated reduction in evaporation causes a drying in Europe. The ice discharge lowers the surface elevation in the Hudson Bay area and thus leads to increased precipitation and accelerated ice sheet regrowth in the post-surge phase. Furthermore, the jet stream widens to the north and becomes more zonal. This contributes to a weakening of the subpolar gyre, and a continued cooling over Europe even after the ice discharge. This two-stage behavior can explain previously contradicting model results and understandings of Heinrich Events. Article in Journal/Newspaper Hudson Bay Ice Sheet North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Hudson Bay Hudson |
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DataCite Metadata Store (German National Library of Science and Technology) |
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Earth Sciences ice sheets climate glacial heinrich events simulation modeling |
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Earth Sciences ice sheets climate glacial heinrich events simulation modeling Ziemen, Florian Andreas Coupled Ice Sheet - Climate simulation |
topic_facet |
Earth Sciences ice sheets climate glacial heinrich events simulation modeling |
description |
Supplement to paper Heinrich events show two-stage climate response in transient glacial simulations in submission to Climate of the past Abstract: Heinrich events are among the dominant modes of glacial climate variability. During these events, massive iceberg armadas were released by the Laurentide Ice Sheet, sailed across the Atlantic, and caused large-scale climate changes. We study these events in a fully coupled complex ice sheet–climate model with synchronous coupling between ice sheets and oceans. The ice discharges occur as internal variability of the model with a recurrence period of 5 kyr, an event duration of 1–1.5 kyr, and a peak discharge rate of about 50 mSv, roughly consistent with reconstructions. The climate response shows a two-stage behavior, with freshwater release effects dominating the surge phase and ice-sheet elevation effects dominating in the post-surge phase. As a direct response to the freshwater discharge during the surge phase, the deepwater formation in the North Atlantic decreases and the North Atlantic deepwater cell weakens by 3.5 Sv. With the reduced oceanic heat transport, the surface temperatures across the North Atlantic decrease, and the associated reduction in evaporation causes a drying in Europe. The ice discharge lowers the surface elevation in the Hudson Bay area and thus leads to increased precipitation and accelerated ice sheet regrowth in the post-surge phase. Furthermore, the jet stream widens to the north and becomes more zonal. This contributes to a weakening of the subpolar gyre, and a continued cooling over Europe even after the ice discharge. This two-stage behavior can explain previously contradicting model results and understandings of Heinrich Events. |
format |
Article in Journal/Newspaper |
author |
Ziemen, Florian Andreas |
author_facet |
Ziemen, Florian Andreas |
author_sort |
Ziemen, Florian Andreas |
title |
Coupled Ice Sheet - Climate simulation |
title_short |
Coupled Ice Sheet - Climate simulation |
title_full |
Coupled Ice Sheet - Climate simulation |
title_fullStr |
Coupled Ice Sheet - Climate simulation |
title_full_unstemmed |
Coupled Ice Sheet - Climate simulation |
title_sort |
coupled ice sheet - climate simulation |
publisher |
Copernicus Publications |
publishDate |
2018 |
url |
https://dx.doi.org/10.5446/35259 https://av.tib.eu/media/35259 |
geographic |
Hudson Bay Hudson |
geographic_facet |
Hudson Bay Hudson |
genre |
Hudson Bay Ice Sheet North Atlantic |
genre_facet |
Hudson Bay Ice Sheet North Atlantic |
op_doi |
https://doi.org/10.5446/35259 |
_version_ |
1766025745404002304 |