Variability in North Pacific intermediate and deep water ventilation during Heinrich events in two coupled climate models
The responses of North Pacific intermediate and deep water ventilation and ocean biogeochemical properties to northern North Atlantic glacial freshwater perturbations are evaluated with a coupled atmosphere-ocean general circulation model MIROC and an earth system model of intermediate complexity LO...
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ftvliz:oai:oma.vliz.be:238570 2023-05-15T15:43:52+02:00 Variability in North Pacific intermediate and deep water ventilation during Heinrich events in two coupled climate models Chikamoto, M.O. Menviel, L. Abe-Ouchi, A. Ohgaito, R. Timmermann, A. Okazaki, Y. Harada, N. Oka, A. Mouchet, A. 2012 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=238570 en eng info:eu-repo/semantics/altIdentifier/wos/000301818900010 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1016/j.dsr2.2011.12.002 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=238570 info:eu-repo/semantics/restrictedAccess %3Ci%3EDeep-Sea+Res.,+Part+II,+Top.+Stud.+Oceanogr.+61-64%3C%2Fi%3E%3A+114-126.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.dsr2.2011.12.002%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.dsr2.2011.12.002%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2012 ftvliz https://doi.org/10.1016/j.dsr2.2011.12.002 2022-05-01T10:16:05Z The responses of North Pacific intermediate and deep water ventilation and ocean biogeochemical properties to northern North Atlantic glacial freshwater perturbations are evaluated with a coupled atmosphere-ocean general circulation model MIROC and an earth system model of intermediate complexity LOVECLIM. When the Atlantic meridional overturning circulation (AMOC) is weakened as a result of the North Atlantic freshwater discharge, both models simulate subthermocline and intermediate water warming in the Pacific Ocean. The sensitivities of the Pacific meridional overturning circulation (PMOC) to AMOC weakening differ significantly between the two models. MIROC simulates a small enhancement of the deep sinking branch of the PMOC in the North Pacific. On the contrary, the LOVECLIM freshwater experiment exhibits intensified deep water formation in the North Pacific, associated with a maximum transport change of 19 Sv. Despite the significant differences in ocean circulation response, both models successfully reproduce high-oxygen and low-nutrient conditions of intermediate and deep waters, in accordance with sediment core based paleoproxy reconstructions from the North Pacific and Bering Sea during Heinrich event 1. Emergence of younger intermediate and deep water in the North Pacific can be partly attributed to an overall enhanced mixing as well as intensified overturning circulation of the subpolar North Pacific. Our models simulate broad features observed in several paleoproxy data of the Pacific Ocean: biological production decrease in northern Japan, cooling in the western North Pacific Ocean, and the southward shift of the Pacific intertropical convergence zone. Article in Journal/Newspaper Bering Sea North Atlantic Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Bering Sea Pacific Deep Sea Research Part II: Topical Studies in Oceanography 61-64 114 126 |
institution |
Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
op_collection_id |
ftvliz |
language |
English |
description |
The responses of North Pacific intermediate and deep water ventilation and ocean biogeochemical properties to northern North Atlantic glacial freshwater perturbations are evaluated with a coupled atmosphere-ocean general circulation model MIROC and an earth system model of intermediate complexity LOVECLIM. When the Atlantic meridional overturning circulation (AMOC) is weakened as a result of the North Atlantic freshwater discharge, both models simulate subthermocline and intermediate water warming in the Pacific Ocean. The sensitivities of the Pacific meridional overturning circulation (PMOC) to AMOC weakening differ significantly between the two models. MIROC simulates a small enhancement of the deep sinking branch of the PMOC in the North Pacific. On the contrary, the LOVECLIM freshwater experiment exhibits intensified deep water formation in the North Pacific, associated with a maximum transport change of 19 Sv. Despite the significant differences in ocean circulation response, both models successfully reproduce high-oxygen and low-nutrient conditions of intermediate and deep waters, in accordance with sediment core based paleoproxy reconstructions from the North Pacific and Bering Sea during Heinrich event 1. Emergence of younger intermediate and deep water in the North Pacific can be partly attributed to an overall enhanced mixing as well as intensified overturning circulation of the subpolar North Pacific. Our models simulate broad features observed in several paleoproxy data of the Pacific Ocean: biological production decrease in northern Japan, cooling in the western North Pacific Ocean, and the southward shift of the Pacific intertropical convergence zone. |
format |
Article in Journal/Newspaper |
author |
Chikamoto, M.O. Menviel, L. Abe-Ouchi, A. Ohgaito, R. Timmermann, A. Okazaki, Y. Harada, N. Oka, A. Mouchet, A. |
spellingShingle |
Chikamoto, M.O. Menviel, L. Abe-Ouchi, A. Ohgaito, R. Timmermann, A. Okazaki, Y. Harada, N. Oka, A. Mouchet, A. Variability in North Pacific intermediate and deep water ventilation during Heinrich events in two coupled climate models |
author_facet |
Chikamoto, M.O. Menviel, L. Abe-Ouchi, A. Ohgaito, R. Timmermann, A. Okazaki, Y. Harada, N. Oka, A. Mouchet, A. |
author_sort |
Chikamoto, M.O. |
title |
Variability in North Pacific intermediate and deep water ventilation during Heinrich events in two coupled climate models |
title_short |
Variability in North Pacific intermediate and deep water ventilation during Heinrich events in two coupled climate models |
title_full |
Variability in North Pacific intermediate and deep water ventilation during Heinrich events in two coupled climate models |
title_fullStr |
Variability in North Pacific intermediate and deep water ventilation during Heinrich events in two coupled climate models |
title_full_unstemmed |
Variability in North Pacific intermediate and deep water ventilation during Heinrich events in two coupled climate models |
title_sort |
variability in north pacific intermediate and deep water ventilation during heinrich events in two coupled climate models |
publishDate |
2012 |
url |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=238570 |
geographic |
Bering Sea Pacific |
geographic_facet |
Bering Sea Pacific |
genre |
Bering Sea North Atlantic |
genre_facet |
Bering Sea North Atlantic |
op_source |
%3Ci%3EDeep-Sea+Res.,+Part+II,+Top.+Stud.+Oceanogr.+61-64%3C%2Fi%3E%3A+114-126.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.dsr2.2011.12.002%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.dsr2.2011.12.002%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000301818900010 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1016/j.dsr2.2011.12.002 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=238570 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.dsr2.2011.12.002 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
61-64 |
container_start_page |
114 |
op_container_end_page |
126 |
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1766378085318393856 |