Carbon isotope evidence for a northern source of deep water in the glacial western North Atlantic
Understanding glacial ocean circulation is tied to understanding heat transport in the North Atlantic, growth and maintenance of ice sheets, and atmospheric CO2 content. The proxy data are sparse, but, for decades, it has been thought that the North Atlantic did not produce deep water during the Las...
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ftpubmed:oai:pubmedcentral.nih.gov:5358345 2023-05-15T17:06:07+02:00 Carbon isotope evidence for a northern source of deep water in the glacial western North Atlantic Keigwin, Lloyd D. Swift, Stephen A. 2017-03-14 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5358345/ http://www.ncbi.nlm.nih.gov/pubmed/28193884 https://doi.org/10.1073/pnas.1614693114 en eng National Academy of Sciences http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5358345/ http://www.ncbi.nlm.nih.gov/pubmed/28193884 http://dx.doi.org/10.1073/pnas.1614693114 Physical Sciences Text 2017 ftpubmed https://doi.org/10.1073/pnas.1614693114 2017-09-17T01:11:49Z Understanding glacial ocean circulation is tied to understanding heat transport in the North Atlantic, growth and maintenance of ice sheets, and atmospheric CO2 content. The proxy data are sparse, but, for decades, it has been thought that the North Atlantic did not produce deep water during the Last Glacial Maximum, unlike today. New C isotope results from a core at 5 km in the western North Atlantic indicate a young, glacial deep water may have been formed in the surface Labrador Sea by freezing and brine rejection. These data call for a revised circulation scheme where southern source water centered at 4.2 km would have been sandwiched between glacial North Atlantic intermediate water and the new dense bottom water. Text Labrador Sea North Atlantic PubMed Central (PMC) Proceedings of the National Academy of Sciences 114 11 2831 2835 |
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English |
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Physical Sciences |
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Physical Sciences Keigwin, Lloyd D. Swift, Stephen A. Carbon isotope evidence for a northern source of deep water in the glacial western North Atlantic |
topic_facet |
Physical Sciences |
description |
Understanding glacial ocean circulation is tied to understanding heat transport in the North Atlantic, growth and maintenance of ice sheets, and atmospheric CO2 content. The proxy data are sparse, but, for decades, it has been thought that the North Atlantic did not produce deep water during the Last Glacial Maximum, unlike today. New C isotope results from a core at 5 km in the western North Atlantic indicate a young, glacial deep water may have been formed in the surface Labrador Sea by freezing and brine rejection. These data call for a revised circulation scheme where southern source water centered at 4.2 km would have been sandwiched between glacial North Atlantic intermediate water and the new dense bottom water. |
format |
Text |
author |
Keigwin, Lloyd D. Swift, Stephen A. |
author_facet |
Keigwin, Lloyd D. Swift, Stephen A. |
author_sort |
Keigwin, Lloyd D. |
title |
Carbon isotope evidence for a northern source of deep water in the glacial western North Atlantic |
title_short |
Carbon isotope evidence for a northern source of deep water in the glacial western North Atlantic |
title_full |
Carbon isotope evidence for a northern source of deep water in the glacial western North Atlantic |
title_fullStr |
Carbon isotope evidence for a northern source of deep water in the glacial western North Atlantic |
title_full_unstemmed |
Carbon isotope evidence for a northern source of deep water in the glacial western North Atlantic |
title_sort |
carbon isotope evidence for a northern source of deep water in the glacial western north atlantic |
publisher |
National Academy of Sciences |
publishDate |
2017 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5358345/ http://www.ncbi.nlm.nih.gov/pubmed/28193884 https://doi.org/10.1073/pnas.1614693114 |
genre |
Labrador Sea North Atlantic |
genre_facet |
Labrador Sea North Atlantic |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5358345/ http://www.ncbi.nlm.nih.gov/pubmed/28193884 http://dx.doi.org/10.1073/pnas.1614693114 |
op_doi |
https://doi.org/10.1073/pnas.1614693114 |
container_title |
Proceedings of the National Academy of Sciences |
container_volume |
114 |
container_issue |
11 |
container_start_page |
2831 |
op_container_end_page |
2835 |
_version_ |
1766061118531305472 |