Reorganization of Atlantic Waters at sub-polar latitudes linked to deep-water overflow in both glacial and interglacial climate states
While a large cryosphere may be a necessary boundary condition for millennial-scale events to persist, a growing body of evidence from previous interglacial periods suggests that high-magnitude climate events are possible during low-cryosphere climate states. However, the full spectrum of variabilit...
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ftdoajarticles:oai:doaj.org/article:f0c1f9b915ea4cf6be326d88bd6ea405 2023-05-15T17:24:23+02:00 Reorganization of Atlantic Waters at sub-polar latitudes linked to deep-water overflow in both glacial and interglacial climate states D. E. Holmes T. L. Babila U. Ninnemann G. Bromley S. Tyrrell G. A. Paterson M. J. Curran A. Morley 2022-05-01T00:00:00Z https://doi.org/10.5194/cp-18-989-2022 https://doaj.org/article/f0c1f9b915ea4cf6be326d88bd6ea405 EN eng Copernicus Publications https://cp.copernicus.org/articles/18/989/2022/cp-18-989-2022.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-18-989-2022 1814-9324 1814-9332 https://doaj.org/article/f0c1f9b915ea4cf6be326d88bd6ea405 Climate of the Past, Vol 18, Pp 989-1009 (2022) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2022 ftdoajarticles https://doi.org/10.5194/cp-18-989-2022 2022-12-30T23:35:36Z While a large cryosphere may be a necessary boundary condition for millennial-scale events to persist, a growing body of evidence from previous interglacial periods suggests that high-magnitude climate events are possible during low-cryosphere climate states. However, the full spectrum of variability, and the antecedent conditions under which such variability can occur, have not been fully described. As a result, the mechanisms generating high-magnitude climate variability during low-cryosphere boundary conditions remain unclear. In this study, high-resolution climate records from Deep Sea Drilling Project (DSDP) site 610 are used to portray the North Atlantic climate's progression through low ice, boundary conditions of Marine Isotope Stage (MIS) 11c into the glacial inception. We show that this period is marked by two climate events displaying rapid shifts in both deep overflow and surface climate. The reorganization between Polar Water and Atlantic Water at subpolar latitudes appears to accompany changes in the flow of deep water emanating from the Nordic Seas, regardless of magnitude or boundary conditions. Further, during both intermediate and low ice boundary conditions, we find that a reduction in deep water precedes surface hydrographic change. The existence of surface and deep-ocean events, with similar magnitudes, abruptness, and surface–deep phasing, advances our mechanistic understanding of, and elucidates antecedent conditions that can lead to, high-magnitude climate instability. Article in Journal/Newspaper Nordic Seas North Atlantic Directory of Open Access Journals: DOAJ Articles Climate of the Past 18 5 989 1009 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 D. E. Holmes T. L. Babila U. Ninnemann G. Bromley S. Tyrrell G. A. Paterson M. J. Curran A. Morley Reorganization of Atlantic Waters at sub-polar latitudes linked to deep-water overflow in both glacial and interglacial climate states |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
description |
While a large cryosphere may be a necessary boundary condition for millennial-scale events to persist, a growing body of evidence from previous interglacial periods suggests that high-magnitude climate events are possible during low-cryosphere climate states. However, the full spectrum of variability, and the antecedent conditions under which such variability can occur, have not been fully described. As a result, the mechanisms generating high-magnitude climate variability during low-cryosphere boundary conditions remain unclear. In this study, high-resolution climate records from Deep Sea Drilling Project (DSDP) site 610 are used to portray the North Atlantic climate's progression through low ice, boundary conditions of Marine Isotope Stage (MIS) 11c into the glacial inception. We show that this period is marked by two climate events displaying rapid shifts in both deep overflow and surface climate. The reorganization between Polar Water and Atlantic Water at subpolar latitudes appears to accompany changes in the flow of deep water emanating from the Nordic Seas, regardless of magnitude or boundary conditions. Further, during both intermediate and low ice boundary conditions, we find that a reduction in deep water precedes surface hydrographic change. The existence of surface and deep-ocean events, with similar magnitudes, abruptness, and surface–deep phasing, advances our mechanistic understanding of, and elucidates antecedent conditions that can lead to, high-magnitude climate instability. |
format |
Article in Journal/Newspaper |
author |
D. E. Holmes T. L. Babila U. Ninnemann G. Bromley S. Tyrrell G. A. Paterson M. J. Curran A. Morley |
author_facet |
D. E. Holmes T. L. Babila U. Ninnemann G. Bromley S. Tyrrell G. A. Paterson M. J. Curran A. Morley |
author_sort |
D. E. Holmes |
title |
Reorganization of Atlantic Waters at sub-polar latitudes linked to deep-water overflow in both glacial and interglacial climate states |
title_short |
Reorganization of Atlantic Waters at sub-polar latitudes linked to deep-water overflow in both glacial and interglacial climate states |
title_full |
Reorganization of Atlantic Waters at sub-polar latitudes linked to deep-water overflow in both glacial and interglacial climate states |
title_fullStr |
Reorganization of Atlantic Waters at sub-polar latitudes linked to deep-water overflow in both glacial and interglacial climate states |
title_full_unstemmed |
Reorganization of Atlantic Waters at sub-polar latitudes linked to deep-water overflow in both glacial and interglacial climate states |
title_sort |
reorganization of atlantic waters at sub-polar latitudes linked to deep-water overflow in both glacial and interglacial climate states |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/cp-18-989-2022 https://doaj.org/article/f0c1f9b915ea4cf6be326d88bd6ea405 |
genre |
Nordic Seas North Atlantic |
genre_facet |
Nordic Seas North Atlantic |
op_source |
Climate of the Past, Vol 18, Pp 989-1009 (2022) |
op_relation |
https://cp.copernicus.org/articles/18/989/2022/cp-18-989-2022.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-18-989-2022 1814-9324 1814-9332 https://doaj.org/article/f0c1f9b915ea4cf6be326d88bd6ea405 |
op_doi |
https://doi.org/10.5194/cp-18-989-2022 |
container_title |
Climate of the Past |
container_volume |
18 |
container_issue |
5 |
container_start_page |
989 |
op_container_end_page |
1009 |
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1766115350638755840 |