Stability of North Atlantic water masses in face of pronounced climate variability during the Pleistocene
Geochemical profiles from the North Atlantic Ocean suggest that the vertical δ13C structure of the water column at intermediate depths did not change significantly between glacial and interglacial time over much of the Pleistocene, despite large changes in ice volume and iceberg delivery from nearby...
Published in: | The Cryosphere |
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Language: | English |
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American Geophysical Union
2004
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Online Access: | https://doi.org/10.7916/D8R49QJH |
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ftcolumbiauniv:oai:academiccommons.columbia.edu:10.7916/D8R49QJH 2023-05-15T16:27:39+02:00 Stability of North Atlantic water masses in face of pronounced climate variability during the Pleistocene Raymo, Maureen E. Oppo, Delia W. Flower, B. P. Hodell, D. A. McManus, Jerry F. Venz, K. A. Kleiven, K. F. McIntyre, K. 2004 https://doi.org/10.7916/D8R49QJH English eng American Geophysical Union https://doi.org/10.7916/D8R49QJH Chemical oceanography--Research Marine sediments--Analysis Pleistocene Geologic Epoch Submarine geology Hydrology Paleoclimatology Articles 2004 ftcolumbiauniv https://doi.org/10.7916/D8R49QJH 2019-04-04T08:14:03Z Geochemical profiles from the North Atlantic Ocean suggest that the vertical δ13C structure of the water column at intermediate depths did not change significantly between glacial and interglacial time over much of the Pleistocene, despite large changes in ice volume and iceberg delivery from nearby landmasses. The most anomalous δ13C profiles are from the extreme interglaciations of the late Pleistocene. This compilation of data suggests that, unlike today (an extreme interglaciation), the two primary sources of northern deep water, Norwegian-Greenland Sea and Labrador Sea/subpolar North Atlantic, had different characteristic δ13C values over most of the Pleistocene. We speculate that the current open sea ice conditions in the Norwegian-Greenland Sea are a relatively rare occurrence and that the high-δ13C deep water that forms in this region today is geologically unusual. If northern source deep waters can have highly variable δ13C, then this likelihood must be considered when inferring past circulation changes from benthic δ13C records. Article in Journal/Newspaper Greenland Greenland Sea Labrador Sea North Atlantic Sea ice Columbia University: Academic Commons Greenland The Cryosphere 6 3 695 711 |
institution |
Open Polar |
collection |
Columbia University: Academic Commons |
op_collection_id |
ftcolumbiauniv |
language |
English |
topic |
Chemical oceanography--Research Marine sediments--Analysis Pleistocene Geologic Epoch Submarine geology Hydrology Paleoclimatology |
spellingShingle |
Chemical oceanography--Research Marine sediments--Analysis Pleistocene Geologic Epoch Submarine geology Hydrology Paleoclimatology Raymo, Maureen E. Oppo, Delia W. Flower, B. P. Hodell, D. A. McManus, Jerry F. Venz, K. A. Kleiven, K. F. McIntyre, K. Stability of North Atlantic water masses in face of pronounced climate variability during the Pleistocene |
topic_facet |
Chemical oceanography--Research Marine sediments--Analysis Pleistocene Geologic Epoch Submarine geology Hydrology Paleoclimatology |
description |
Geochemical profiles from the North Atlantic Ocean suggest that the vertical δ13C structure of the water column at intermediate depths did not change significantly between glacial and interglacial time over much of the Pleistocene, despite large changes in ice volume and iceberg delivery from nearby landmasses. The most anomalous δ13C profiles are from the extreme interglaciations of the late Pleistocene. This compilation of data suggests that, unlike today (an extreme interglaciation), the two primary sources of northern deep water, Norwegian-Greenland Sea and Labrador Sea/subpolar North Atlantic, had different characteristic δ13C values over most of the Pleistocene. We speculate that the current open sea ice conditions in the Norwegian-Greenland Sea are a relatively rare occurrence and that the high-δ13C deep water that forms in this region today is geologically unusual. If northern source deep waters can have highly variable δ13C, then this likelihood must be considered when inferring past circulation changes from benthic δ13C records. |
format |
Article in Journal/Newspaper |
author |
Raymo, Maureen E. Oppo, Delia W. Flower, B. P. Hodell, D. A. McManus, Jerry F. Venz, K. A. Kleiven, K. F. McIntyre, K. |
author_facet |
Raymo, Maureen E. Oppo, Delia W. Flower, B. P. Hodell, D. A. McManus, Jerry F. Venz, K. A. Kleiven, K. F. McIntyre, K. |
author_sort |
Raymo, Maureen E. |
title |
Stability of North Atlantic water masses in face of pronounced climate variability during the Pleistocene |
title_short |
Stability of North Atlantic water masses in face of pronounced climate variability during the Pleistocene |
title_full |
Stability of North Atlantic water masses in face of pronounced climate variability during the Pleistocene |
title_fullStr |
Stability of North Atlantic water masses in face of pronounced climate variability during the Pleistocene |
title_full_unstemmed |
Stability of North Atlantic water masses in face of pronounced climate variability during the Pleistocene |
title_sort |
stability of north atlantic water masses in face of pronounced climate variability during the pleistocene |
publisher |
American Geophysical Union |
publishDate |
2004 |
url |
https://doi.org/10.7916/D8R49QJH |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland Sea Labrador Sea North Atlantic Sea ice |
genre_facet |
Greenland Greenland Sea Labrador Sea North Atlantic Sea ice |
op_relation |
https://doi.org/10.7916/D8R49QJH |
op_doi |
https://doi.org/10.7916/D8R49QJH |
container_title |
The Cryosphere |
container_volume |
6 |
container_issue |
3 |
container_start_page |
695 |
op_container_end_page |
711 |
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1766017112631934976 |