Dependence of abrupt Atlantic meridional ocean circulation changes on climate background states
Abrupt decadal climate changes during the last glacial-interglacial cycle are less pronounced during maximum glacial conditions and absent during the Holocene. To further understand the underlying dynamics, we conduct hosing experiments for three climate states: Pre-industrial (PI), 32 kilo years be...
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ftawi:oai:epic.awi.de:33362 2023-05-15T17:06:03+02:00 Dependence of abrupt Atlantic meridional ocean circulation changes on climate background states Gong, Xun Knorr, Gregor Lohmann, Gerrit Zhang, Xu 2013-07 https://epic.awi.de/id/eprint/33362/ http://onlinelibrary.wiley.com/doi/10.1002/grl.50701/abstract https://hdl.handle.net/10013/epic.41924 unknown AMER GEOPHYSICAL UNION Gong, X. , Knorr, G. orcid:0000-0002-8317-5046 , Lohmann, G. orcid:0000-0003-2089-733X and Zhang, X. orcid:0000-0003-1833-9689 (2013) Dependence of abrupt Atlantic meridional ocean circulation changes on climate background states , Geophysical Research Letters . doi:10.1002/grl.50701 <https://doi.org/10.1002/grl.50701> , hdl:10013/epic.41924 EPIC3Geophysical Research Letters, AMER GEOPHYSICAL UNION, ISSN: 0094-8276 Article isiRev 2013 ftawi https://doi.org/10.1002/grl.50701 2021-12-24T15:38:48Z Abrupt decadal climate changes during the last glacial-interglacial cycle are less pronounced during maximum glacial conditions and absent during the Holocene. To further understand the underlying dynamics, we conduct hosing experiments for three climate states: Pre-industrial (PI), 32 kilo years before present (ka BP) and Last Glacial Maximum (LGM). Our simulations show that a stronger temperature inversion between the surface and intermediate layer in the South Labrador Sea induces a faster restart of convective processes (32 ka BP > LGM > PI) during the initial resumption of the Atlantic meridional overturning circulation (AMOC). A few decades later, an AMOC overshoot is mainly linked to the advection of warmer and saltier intermediate-layer water from the tropical Atlantic into the South Labrador Sea, which causes a stronger deep-water formation than that before the freshwater perturbation. This mechanism is most pronounced during the 32 ka BP, weaker during the LGM and absent during the PI. Article in Journal/Newspaper Labrador Sea Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Geophysical Research Letters 40 14 3698 3704 |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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description |
Abrupt decadal climate changes during the last glacial-interglacial cycle are less pronounced during maximum glacial conditions and absent during the Holocene. To further understand the underlying dynamics, we conduct hosing experiments for three climate states: Pre-industrial (PI), 32 kilo years before present (ka BP) and Last Glacial Maximum (LGM). Our simulations show that a stronger temperature inversion between the surface and intermediate layer in the South Labrador Sea induces a faster restart of convective processes (32 ka BP > LGM > PI) during the initial resumption of the Atlantic meridional overturning circulation (AMOC). A few decades later, an AMOC overshoot is mainly linked to the advection of warmer and saltier intermediate-layer water from the tropical Atlantic into the South Labrador Sea, which causes a stronger deep-water formation than that before the freshwater perturbation. This mechanism is most pronounced during the 32 ka BP, weaker during the LGM and absent during the PI. |
format |
Article in Journal/Newspaper |
author |
Gong, Xun Knorr, Gregor Lohmann, Gerrit Zhang, Xu |
spellingShingle |
Gong, Xun Knorr, Gregor Lohmann, Gerrit Zhang, Xu Dependence of abrupt Atlantic meridional ocean circulation changes on climate background states |
author_facet |
Gong, Xun Knorr, Gregor Lohmann, Gerrit Zhang, Xu |
author_sort |
Gong, Xun |
title |
Dependence of abrupt Atlantic meridional ocean circulation changes on climate background states |
title_short |
Dependence of abrupt Atlantic meridional ocean circulation changes on climate background states |
title_full |
Dependence of abrupt Atlantic meridional ocean circulation changes on climate background states |
title_fullStr |
Dependence of abrupt Atlantic meridional ocean circulation changes on climate background states |
title_full_unstemmed |
Dependence of abrupt Atlantic meridional ocean circulation changes on climate background states |
title_sort |
dependence of abrupt atlantic meridional ocean circulation changes on climate background states |
publisher |
AMER GEOPHYSICAL UNION |
publishDate |
2013 |
url |
https://epic.awi.de/id/eprint/33362/ http://onlinelibrary.wiley.com/doi/10.1002/grl.50701/abstract https://hdl.handle.net/10013/epic.41924 |
genre |
Labrador Sea |
genre_facet |
Labrador Sea |
op_source |
EPIC3Geophysical Research Letters, AMER GEOPHYSICAL UNION, ISSN: 0094-8276 |
op_relation |
Gong, X. , Knorr, G. orcid:0000-0002-8317-5046 , Lohmann, G. orcid:0000-0003-2089-733X and Zhang, X. orcid:0000-0003-1833-9689 (2013) Dependence of abrupt Atlantic meridional ocean circulation changes on climate background states , Geophysical Research Letters . doi:10.1002/grl.50701 <https://doi.org/10.1002/grl.50701> , hdl:10013/epic.41924 |
op_doi |
https://doi.org/10.1002/grl.50701 |
container_title |
Geophysical Research Letters |
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40 |
container_issue |
14 |
container_start_page |
3698 |
op_container_end_page |
3704 |
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1766060962080620544 |