Rapid Communication 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 evidenc...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.693.2532 2023-05-15T13:49:54+02:00 Rapid Communication Holocene bipolar climate seesaw: possible subtle evidence from the deep North East Atlantic Ocean? Mark A. Maslin Christopher W. Smart The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.693.2532 http://www.geog.ucl.ac.uk/about-the-department/people/academic-staff/mark-maslin/files/Maslin+and+Smart+2010.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.693.2532 http://www.geog.ucl.ac.uk/about-the-department/people/academic-staff/mark-maslin/files/Maslin+and+Smart+2010.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.geog.ucl.ac.uk/about-the-department/people/academic-staff/mark-maslin/files/Maslin+and+Smart+2010.pdf Holocene North Atlantic bipolar climate seesaw millennial events deep water text ftciteseerx 2016-01-08T18:30:02Z 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 4844m 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 aHolocene bipolar climate seesaw and that the deep oceanwas 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 Text Antarc* Antarctic North Atlantic Deep Water North Atlantic North East Atlantic Southern Ocean Unknown Antarctic Southern Ocean |
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ftciteseerx |
language |
English |
topic |
Holocene North Atlantic bipolar climate seesaw millennial events deep water |
spellingShingle |
Holocene North Atlantic bipolar climate seesaw millennial events deep water Mark A. Maslin Christopher W. Smart Rapid Communication Holocene bipolar climate seesaw: possible subtle evidence from the deep North East Atlantic Ocean? |
topic_facet |
Holocene North Atlantic bipolar climate seesaw millennial events deep water |
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 4844m 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 aHolocene bipolar climate seesaw and that the deep oceanwas 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 |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Mark A. Maslin Christopher W. Smart |
author_facet |
Mark A. Maslin Christopher W. Smart |
author_sort |
Mark A. Maslin |
title |
Rapid Communication Holocene bipolar climate seesaw: possible subtle evidence from the deep North East Atlantic Ocean? |
title_short |
Rapid Communication Holocene bipolar climate seesaw: possible subtle evidence from the deep North East Atlantic Ocean? |
title_full |
Rapid Communication Holocene bipolar climate seesaw: possible subtle evidence from the deep North East Atlantic Ocean? |
title_fullStr |
Rapid Communication Holocene bipolar climate seesaw: possible subtle evidence from the deep North East Atlantic Ocean? |
title_full_unstemmed |
Rapid Communication Holocene bipolar climate seesaw: possible subtle evidence from the deep North East Atlantic Ocean? |
title_sort |
rapid communication holocene bipolar climate seesaw: possible subtle evidence from the deep north east atlantic ocean? |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.693.2532 http://www.geog.ucl.ac.uk/about-the-department/people/academic-staff/mark-maslin/files/Maslin+and+Smart+2010.pdf |
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 |
http://www.geog.ucl.ac.uk/about-the-department/people/academic-staff/mark-maslin/files/Maslin+and+Smart+2010.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.693.2532 http://www.geog.ucl.ac.uk/about-the-department/people/academic-staff/mark-maslin/files/Maslin+and+Smart+2010.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766252490006724608 |