The Deglacial Evolution of North Atlantic Deep Convection
Deepwater formation in the North Atlantic by open-ocean convection is an essential component of the overturning circulation of the Atlantic Ocean, which helps regulate global climate. We use water-column radiocarbon reconstructions to examine changes in northeast Atlantic convection since the Last G...
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ftucl:oai:eprints.ucl.ac.uk.OAI2:1396381 2023-12-24T10:11:30+01:00 The Deglacial Evolution of North Atlantic Deep Convection Thornalley, DJR Barker, S Broecker, WS Elderfield, H McCave, IN 2011-01-14 text https://discovery.ucl.ac.uk/id/eprint/1396381/1/Thornalley_The%20deglacial%20evolution%20of%20North%20Atlantic%20deep.pdf https://discovery.ucl.ac.uk/id/eprint/1396381/ eng eng https://discovery.ucl.ac.uk/id/eprint/1396381/1/Thornalley_The%20deglacial%20evolution%20of%20North%20Atlantic%20deep.pdf https://discovery.ucl.ac.uk/id/eprint/1396381/ open Science , 331 (6014) 202 - 205. (2011) Article 2011 ftucl 2023-11-27T13:07:38Z Deepwater formation in the North Atlantic by open-ocean convection is an essential component of the overturning circulation of the Atlantic Ocean, which helps regulate global climate. We use water-column radiocarbon reconstructions to examine changes in northeast Atlantic convection since the Last Glacial Maximum. During cold intervals, we infer a reduction in open-ocean convection and an associated incursion of an extremely radiocarbon (14C)–depleted water mass, interpreted to be Antarctic Intermediate Water. Comparing the timing of deep convection changes in the northeast and northwest Atlantic, we suggest that, despite a strong control on Greenland temperature by northeast Atlantic convection, reduced open-ocean convection in both the northwest and northeast Atlantic is necessary to account for contemporaneous perturbations in atmospheric circulation. Article in Journal/Newspaper Antarc* Antarctic Greenland North Atlantic Northeast Atlantic Northwest Atlantic University College London: UCL Discovery Antarctic Greenland |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
English |
description |
Deepwater formation in the North Atlantic by open-ocean convection is an essential component of the overturning circulation of the Atlantic Ocean, which helps regulate global climate. We use water-column radiocarbon reconstructions to examine changes in northeast Atlantic convection since the Last Glacial Maximum. During cold intervals, we infer a reduction in open-ocean convection and an associated incursion of an extremely radiocarbon (14C)–depleted water mass, interpreted to be Antarctic Intermediate Water. Comparing the timing of deep convection changes in the northeast and northwest Atlantic, we suggest that, despite a strong control on Greenland temperature by northeast Atlantic convection, reduced open-ocean convection in both the northwest and northeast Atlantic is necessary to account for contemporaneous perturbations in atmospheric circulation. |
format |
Article in Journal/Newspaper |
author |
Thornalley, DJR Barker, S Broecker, WS Elderfield, H McCave, IN |
spellingShingle |
Thornalley, DJR Barker, S Broecker, WS Elderfield, H McCave, IN The Deglacial Evolution of North Atlantic Deep Convection |
author_facet |
Thornalley, DJR Barker, S Broecker, WS Elderfield, H McCave, IN |
author_sort |
Thornalley, DJR |
title |
The Deglacial Evolution of North Atlantic Deep Convection |
title_short |
The Deglacial Evolution of North Atlantic Deep Convection |
title_full |
The Deglacial Evolution of North Atlantic Deep Convection |
title_fullStr |
The Deglacial Evolution of North Atlantic Deep Convection |
title_full_unstemmed |
The Deglacial Evolution of North Atlantic Deep Convection |
title_sort |
deglacial evolution of north atlantic deep convection |
publishDate |
2011 |
url |
https://discovery.ucl.ac.uk/id/eprint/1396381/1/Thornalley_The%20deglacial%20evolution%20of%20North%20Atlantic%20deep.pdf https://discovery.ucl.ac.uk/id/eprint/1396381/ |
geographic |
Antarctic Greenland |
geographic_facet |
Antarctic Greenland |
genre |
Antarc* Antarctic Greenland North Atlantic Northeast Atlantic Northwest Atlantic |
genre_facet |
Antarc* Antarctic Greenland North Atlantic Northeast Atlantic Northwest Atlantic |
op_source |
Science , 331 (6014) 202 - 205. (2011) |
op_relation |
https://discovery.ucl.ac.uk/id/eprint/1396381/1/Thornalley_The%20deglacial%20evolution%20of%20North%20Atlantic%20deep.pdf https://discovery.ucl.ac.uk/id/eprint/1396381/ |
op_rights |
open |
_version_ |
1786166068656472064 |