North Atlantic ocean circulation and abrupt climate change during the last glaciation.
The most recent ice age was characterized by rapid and hemispherically asynchronous climate oscillations, whose origin remains unresolved. Variations in oceanic meridional heat transport may contribute to these repeated climate changes, which were most pronounced during marine isotope stage 3, the g...
Main Authors: | , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Association for the Advancement of Science (AAAS)
2016
|
Subjects: | |
Online Access: | https://www.repository.cam.ac.uk/handle/1810/296364 https://doi.org/10.17863/CAM.43413 |
id |
ftunivcam:oai:www.repository.cam.ac.uk:1810/296364 |
---|---|
record_format |
openpolar |
spelling |
ftunivcam:oai:www.repository.cam.ac.uk:1810/296364 2024-02-04T10:01:03+01:00 North Atlantic ocean circulation and abrupt climate change during the last glaciation. Henry, LG McManus, JF Curry, WB Roberts, NL Piotrowski, AM Keigwin, LD 2016-07-29 Print-Electronic application/pdf https://www.repository.cam.ac.uk/handle/1810/296364 https://doi.org/10.17863/CAM.43413 eng eng American Association for the Advancement of Science (AAAS) http://dx.doi.org/10.1126/science.aaf5529 Science https://www.repository.cam.ac.uk/handle/1810/296364 doi:10.17863/CAM.43413 All rights reserved 0405 Oceanography 0406 Physical Geography and Environmental Geoscience 0403 Geology Article 2016 ftunivcam https://doi.org/10.17863/CAM.43413 2024-01-11T23:27:42Z The most recent ice age was characterized by rapid and hemispherically asynchronous climate oscillations, whose origin remains unresolved. Variations in oceanic meridional heat transport may contribute to these repeated climate changes, which were most pronounced during marine isotope stage 3, the glacial interval 25 thousand to 60 thousand years ago. We examined climate and ocean circulation proxies throughout this interval at high resolution in a deep North Atlantic sediment core, combining the kinematic tracer protactinium/thorium (Pa/Th) with the deep water-mass tracer, epibenthic δ(13)C. These indicators suggest reduced Atlantic overturning circulation during every cool northern stadial, with the greatest reductions during episodic Hudson Strait iceberg discharges, while sharp northern warming followed reinvigorated overturning. These results provide direct evidence for the ocean's persistent, central role in abrupt glacial climate change. Article in Journal/Newspaper Hudson Strait North Atlantic Apollo - University of Cambridge Repository Hudson Hudson Strait ENVELOPE(-70.000,-70.000,62.000,62.000) |
institution |
Open Polar |
collection |
Apollo - University of Cambridge Repository |
op_collection_id |
ftunivcam |
language |
English |
topic |
0405 Oceanography 0406 Physical Geography and Environmental Geoscience 0403 Geology |
spellingShingle |
0405 Oceanography 0406 Physical Geography and Environmental Geoscience 0403 Geology Henry, LG McManus, JF Curry, WB Roberts, NL Piotrowski, AM Keigwin, LD North Atlantic ocean circulation and abrupt climate change during the last glaciation. |
topic_facet |
0405 Oceanography 0406 Physical Geography and Environmental Geoscience 0403 Geology |
description |
The most recent ice age was characterized by rapid and hemispherically asynchronous climate oscillations, whose origin remains unresolved. Variations in oceanic meridional heat transport may contribute to these repeated climate changes, which were most pronounced during marine isotope stage 3, the glacial interval 25 thousand to 60 thousand years ago. We examined climate and ocean circulation proxies throughout this interval at high resolution in a deep North Atlantic sediment core, combining the kinematic tracer protactinium/thorium (Pa/Th) with the deep water-mass tracer, epibenthic δ(13)C. These indicators suggest reduced Atlantic overturning circulation during every cool northern stadial, with the greatest reductions during episodic Hudson Strait iceberg discharges, while sharp northern warming followed reinvigorated overturning. These results provide direct evidence for the ocean's persistent, central role in abrupt glacial climate change. |
format |
Article in Journal/Newspaper |
author |
Henry, LG McManus, JF Curry, WB Roberts, NL Piotrowski, AM Keigwin, LD |
author_facet |
Henry, LG McManus, JF Curry, WB Roberts, NL Piotrowski, AM Keigwin, LD |
author_sort |
Henry, LG |
title |
North Atlantic ocean circulation and abrupt climate change during the last glaciation. |
title_short |
North Atlantic ocean circulation and abrupt climate change during the last glaciation. |
title_full |
North Atlantic ocean circulation and abrupt climate change during the last glaciation. |
title_fullStr |
North Atlantic ocean circulation and abrupt climate change during the last glaciation. |
title_full_unstemmed |
North Atlantic ocean circulation and abrupt climate change during the last glaciation. |
title_sort |
north atlantic ocean circulation and abrupt climate change during the last glaciation. |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2016 |
url |
https://www.repository.cam.ac.uk/handle/1810/296364 https://doi.org/10.17863/CAM.43413 |
long_lat |
ENVELOPE(-70.000,-70.000,62.000,62.000) |
geographic |
Hudson Hudson Strait |
geographic_facet |
Hudson Hudson Strait |
genre |
Hudson Strait North Atlantic |
genre_facet |
Hudson Strait North Atlantic |
op_relation |
https://www.repository.cam.ac.uk/handle/1810/296364 doi:10.17863/CAM.43413 |
op_rights |
All rights reserved |
op_doi |
https://doi.org/10.17863/CAM.43413 |
_version_ |
1789966695358529536 |