Asymmetry of AMOC Hysteresis in a State‐Of‐The‐Art Global Climate Model
Abstract We study hysteresis properties of the Atlantic Meridional Overturning Circulation (AMOC) under a slowly‐varying North Atlantic (20°N–50°N) freshwater flux forcing in state‐of‐the‐art global climate model (GCM), the Community Earth System Model. Results are presented of a full hysteresis sim...
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ftdoajarticles:oai:doaj.org/article:0dc1d032882a4e22aeee4ff517cf6882 2024-09-09T19:55:34+00:00 Asymmetry of AMOC Hysteresis in a State‐Of‐The‐Art Global Climate Model René M. vanWesten Henk A. Dijkstra 2023-11-01T00:00:00Z https://doi.org/10.1029/2023GL106088 https://doaj.org/article/0dc1d032882a4e22aeee4ff517cf6882 EN eng Wiley https://doi.org/10.1029/2023GL106088 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2023GL106088 https://doaj.org/article/0dc1d032882a4e22aeee4ff517cf6882 Geophysical Research Letters, Vol 50, Iss 22, Pp n/a-n/a (2023) ocean circulation tipping CESM hysteresis sea‐ice Geophysics. Cosmic physics QC801-809 article 2023 ftdoajarticles https://doi.org/10.1029/2023GL106088 2024-08-05T17:49:23Z Abstract We study hysteresis properties of the Atlantic Meridional Overturning Circulation (AMOC) under a slowly‐varying North Atlantic (20°N–50°N) freshwater flux forcing in state‐of‐the‐art global climate model (GCM), the Community Earth System Model. Results are presented of a full hysteresis simulation (4,400 model years) and show that there is a hysteresis width of about 0.4 Sv. This demonstrates that an AMOC collapse and recovery do not only occur in conceptual and idealized climate models, but also in a state‐of‐the‐art GCM. The AMOC recovery is about a factor six faster than the AMOC collapse and this asymmetry is due to the major effect of the North Atlantic sea‐ice distribution on the AMOC recovery. The results have implications for projections of possible future AMOC behavior and for explaining relatively rapid climate transitions in the geological past. Article in Journal/Newspaper North Atlantic Sea ice Directory of Open Access Journals: DOAJ Articles Geophysical Research Letters 50 22 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
ocean circulation tipping CESM hysteresis sea‐ice Geophysics. Cosmic physics QC801-809 |
spellingShingle |
ocean circulation tipping CESM hysteresis sea‐ice Geophysics. Cosmic physics QC801-809 René M. vanWesten Henk A. Dijkstra Asymmetry of AMOC Hysteresis in a State‐Of‐The‐Art Global Climate Model |
topic_facet |
ocean circulation tipping CESM hysteresis sea‐ice Geophysics. Cosmic physics QC801-809 |
description |
Abstract We study hysteresis properties of the Atlantic Meridional Overturning Circulation (AMOC) under a slowly‐varying North Atlantic (20°N–50°N) freshwater flux forcing in state‐of‐the‐art global climate model (GCM), the Community Earth System Model. Results are presented of a full hysteresis simulation (4,400 model years) and show that there is a hysteresis width of about 0.4 Sv. This demonstrates that an AMOC collapse and recovery do not only occur in conceptual and idealized climate models, but also in a state‐of‐the‐art GCM. The AMOC recovery is about a factor six faster than the AMOC collapse and this asymmetry is due to the major effect of the North Atlantic sea‐ice distribution on the AMOC recovery. The results have implications for projections of possible future AMOC behavior and for explaining relatively rapid climate transitions in the geological past. |
format |
Article in Journal/Newspaper |
author |
René M. vanWesten Henk A. Dijkstra |
author_facet |
René M. vanWesten Henk A. Dijkstra |
author_sort |
René M. vanWesten |
title |
Asymmetry of AMOC Hysteresis in a State‐Of‐The‐Art Global Climate Model |
title_short |
Asymmetry of AMOC Hysteresis in a State‐Of‐The‐Art Global Climate Model |
title_full |
Asymmetry of AMOC Hysteresis in a State‐Of‐The‐Art Global Climate Model |
title_fullStr |
Asymmetry of AMOC Hysteresis in a State‐Of‐The‐Art Global Climate Model |
title_full_unstemmed |
Asymmetry of AMOC Hysteresis in a State‐Of‐The‐Art Global Climate Model |
title_sort |
asymmetry of amoc hysteresis in a state‐of‐the‐art global climate model |
publisher |
Wiley |
publishDate |
2023 |
url |
https://doi.org/10.1029/2023GL106088 https://doaj.org/article/0dc1d032882a4e22aeee4ff517cf6882 |
genre |
North Atlantic Sea ice |
genre_facet |
North Atlantic Sea ice |
op_source |
Geophysical Research Letters, Vol 50, Iss 22, Pp n/a-n/a (2023) |
op_relation |
https://doi.org/10.1029/2023GL106088 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2023GL106088 https://doaj.org/article/0dc1d032882a4e22aeee4ff517cf6882 |
op_doi |
https://doi.org/10.1029/2023GL106088 |
container_title |
Geophysical Research Letters |
container_volume |
50 |
container_issue |
22 |
_version_ |
1809925453782188032 |