Holocene bipolar climate seesaw: possible subtle evidence from the deep North East Atlantic Ocean?
Abstract The occurrence of a millennial‐scale bipolar climate seesaw has been documented in detail for the last glacial period and Termination. There is, however, debate whether it occurs during interglacials and if it does what influence it could have on future climate. We present here new evidence...
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crwiley:10.1002/jqs.1344 2024-06-02T07:56:58+00:00 Holocene bipolar climate seesaw: possible subtle evidence from the deep North East Atlantic Ocean? Maslin, Mark A. Smart, Christopher W. 2009 http://dx.doi.org/10.1002/jqs.1344 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.1344 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.1344 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Quaternary Science volume 25, issue 3, page 237-242 ISSN 0267-8179 1099-1417 journal-article 2009 crwiley https://doi.org/10.1002/jqs.1344 2024-05-03T11:43:29Z Abstract The occurrence of a millennial‐scale bipolar climate seesaw has been documented in detail for the last glacial period and Termination. There is, however, debate whether it occurs during interglacials and if it does what influence it could have on future climate. We present here new evidence from a North East Atlantic Ocean deep‐sea core which supports the hypothesis for a Holocene bipolar climate seesaw. BENGAL Site 13078#16, from the Porcupine Abyssal Plain, is 4844 m deep and situated at the North Atlantic Deep Water and Antarctic Bottom Water (AABW) interface. Planktic foraminiferal fragment accumulation rate data at this site is an indicator of coarse carbonate dissolution, which is highly sensitive to the incursion of under‐saturated AABW. Five dissolution peaks have been identified, which seem to occur approximately 500 a after each of the North Atlantic 'Bond' ice rafting pulses, suggesting a subsequent subtle shallowing of AABW. This indicates a possible lagged climatic link between North East Atlantic surface water conditions and AABW production in the Southern Ocean during the Holocene. This provides the first tentative evidence that there was a Holocene bipolar climate seesaw and that the deep ocean was involved. This study also suggests that extremely sensitive locations need to be sought as the Holocene bipolar climate seesaw seems to be very subtle compared with its glacial counterparts. Copyright © 2009 John Wiley & Sons, Ltd. Article in Journal/Newspaper Antarc* Antarctic North Atlantic Deep Water North Atlantic North East Atlantic Southern Ocean Wiley Online Library Antarctic Southern Ocean Journal of Quaternary Science 25 3 237 242 |
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Wiley Online Library |
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English |
description |
Abstract The occurrence of a millennial‐scale bipolar climate seesaw has been documented in detail for the last glacial period and Termination. There is, however, debate whether it occurs during interglacials and if it does what influence it could have on future climate. We present here new evidence from a North East Atlantic Ocean deep‐sea core which supports the hypothesis for a Holocene bipolar climate seesaw. BENGAL Site 13078#16, from the Porcupine Abyssal Plain, is 4844 m deep and situated at the North Atlantic Deep Water and Antarctic Bottom Water (AABW) interface. Planktic foraminiferal fragment accumulation rate data at this site is an indicator of coarse carbonate dissolution, which is highly sensitive to the incursion of under‐saturated AABW. Five dissolution peaks have been identified, which seem to occur approximately 500 a after each of the North Atlantic 'Bond' ice rafting pulses, suggesting a subsequent subtle shallowing of AABW. This indicates a possible lagged climatic link between North East Atlantic surface water conditions and AABW production in the Southern Ocean during the Holocene. This provides the first tentative evidence that there was a Holocene bipolar climate seesaw and that the deep ocean was involved. This study also suggests that extremely sensitive locations need to be sought as the Holocene bipolar climate seesaw seems to be very subtle compared with its glacial counterparts. Copyright © 2009 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Maslin, Mark A. Smart, Christopher W. |
spellingShingle |
Maslin, Mark A. Smart, Christopher W. Holocene bipolar climate seesaw: possible subtle evidence from the deep North East Atlantic Ocean? |
author_facet |
Maslin, Mark A. Smart, Christopher W. |
author_sort |
Maslin, Mark A. |
title |
Holocene bipolar climate seesaw: possible subtle evidence from the deep North East Atlantic Ocean? |
title_short |
Holocene bipolar climate seesaw: possible subtle evidence from the deep North East Atlantic Ocean? |
title_full |
Holocene bipolar climate seesaw: possible subtle evidence from the deep North East Atlantic Ocean? |
title_fullStr |
Holocene bipolar climate seesaw: possible subtle evidence from the deep North East Atlantic Ocean? |
title_full_unstemmed |
Holocene bipolar climate seesaw: possible subtle evidence from the deep North East Atlantic Ocean? |
title_sort |
holocene bipolar climate seesaw: possible subtle evidence from the deep north east atlantic ocean? |
publisher |
Wiley |
publishDate |
2009 |
url |
http://dx.doi.org/10.1002/jqs.1344 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjqs.1344 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.1344 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic North Atlantic Deep Water North Atlantic North East Atlantic Southern Ocean |
genre_facet |
Antarc* Antarctic North Atlantic Deep Water North Atlantic North East Atlantic Southern Ocean |
op_source |
Journal of Quaternary Science volume 25, issue 3, page 237-242 ISSN 0267-8179 1099-1417 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/jqs.1344 |
container_title |
Journal of Quaternary Science |
container_volume |
25 |
container_issue |
3 |
container_start_page |
237 |
op_container_end_page |
242 |
_version_ |
1800737462898655232 |