North Atlantic Deep Water Production during the Last Glacial Maximum
Changes in deep ocean ventilation are commonly invoked as the primary cause of lower glacial atmospheric CO2. The water mass structure of the glacial deep Atlantic Ocean and the mechanism by which it may have sequestered carbon remain elusive. Here we present neodymium isotope measurements from core...
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Online Access: | https://oceanrep.geomar.de/id/eprint/44216/ https://oceanrep.geomar.de/id/eprint/44216/1/ncomms11765.pdf https://doi.org/10.1038/ncomms11765 |
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ftoceanrep:oai:oceanrep.geomar.de:44216 2023-08-27T04:10:41+02:00 North Atlantic Deep Water Production during the Last Glacial Maximum Howe, Jacob N. W. Piotrowski, Alexander M. Noble, Taryn L. Mulitza, Stefan Chiessi, Cristiano M. Bayon, Germain 2016 text https://oceanrep.geomar.de/id/eprint/44216/ https://oceanrep.geomar.de/id/eprint/44216/1/ncomms11765.pdf https://doi.org/10.1038/ncomms11765 en eng Nature Research https://oceanrep.geomar.de/id/eprint/44216/1/ncomms11765.pdf Howe, J. N. W., Piotrowski, A. M., Noble, T. L., Mulitza, S., Chiessi, C. M. and Bayon, G. (2016) North Atlantic Deep Water Production during the Last Glacial Maximum. Open Access Nature Communications, 7 . Art.Nr. 11765. DOI 10.1038/ncomms11765 <https://doi.org/10.1038/ncomms11765>. doi:10.1038/ncomms11765 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2016 ftoceanrep https://doi.org/10.1038/ncomms11765 2023-08-06T23:19:54Z Changes in deep ocean ventilation are commonly invoked as the primary cause of lower glacial atmospheric CO2. The water mass structure of the glacial deep Atlantic Ocean and the mechanism by which it may have sequestered carbon remain elusive. Here we present neodymium isotope measurements from cores throughout the Atlantic that reveal glacial–interglacial changes in water mass distributions. These results demonstrate the sustained production of North Atlantic Deep Water under glacial conditions, indicating that southern-sourced waters were not as spatially extensive during the Last Glacial Maximum as previously believed. We demonstrate that the depleted glacial δ13C values in the deep Atlantic Ocean cannot be explained solely by water mass source changes. A greater amount of respired carbon, therefore, must have been stored in the abyssal Atlantic during the Last Glacial Maximum. We infer that this was achieved by a sluggish deep overturning cell, comprised of well-mixed northern- and southern-sourced waters. Article in Journal/Newspaper North Atlantic Deep Water North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Nature Communications 7 1 |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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language |
English |
description |
Changes in deep ocean ventilation are commonly invoked as the primary cause of lower glacial atmospheric CO2. The water mass structure of the glacial deep Atlantic Ocean and the mechanism by which it may have sequestered carbon remain elusive. Here we present neodymium isotope measurements from cores throughout the Atlantic that reveal glacial–interglacial changes in water mass distributions. These results demonstrate the sustained production of North Atlantic Deep Water under glacial conditions, indicating that southern-sourced waters were not as spatially extensive during the Last Glacial Maximum as previously believed. We demonstrate that the depleted glacial δ13C values in the deep Atlantic Ocean cannot be explained solely by water mass source changes. A greater amount of respired carbon, therefore, must have been stored in the abyssal Atlantic during the Last Glacial Maximum. We infer that this was achieved by a sluggish deep overturning cell, comprised of well-mixed northern- and southern-sourced waters. |
format |
Article in Journal/Newspaper |
author |
Howe, Jacob N. W. Piotrowski, Alexander M. Noble, Taryn L. Mulitza, Stefan Chiessi, Cristiano M. Bayon, Germain |
spellingShingle |
Howe, Jacob N. W. Piotrowski, Alexander M. Noble, Taryn L. Mulitza, Stefan Chiessi, Cristiano M. Bayon, Germain North Atlantic Deep Water Production during the Last Glacial Maximum |
author_facet |
Howe, Jacob N. W. Piotrowski, Alexander M. Noble, Taryn L. Mulitza, Stefan Chiessi, Cristiano M. Bayon, Germain |
author_sort |
Howe, Jacob N. W. |
title |
North Atlantic Deep Water Production during the Last Glacial Maximum |
title_short |
North Atlantic Deep Water Production during the Last Glacial Maximum |
title_full |
North Atlantic Deep Water Production during the Last Glacial Maximum |
title_fullStr |
North Atlantic Deep Water Production during the Last Glacial Maximum |
title_full_unstemmed |
North Atlantic Deep Water Production during the Last Glacial Maximum |
title_sort |
north atlantic deep water production during the last glacial maximum |
publisher |
Nature Research |
publishDate |
2016 |
url |
https://oceanrep.geomar.de/id/eprint/44216/ https://oceanrep.geomar.de/id/eprint/44216/1/ncomms11765.pdf https://doi.org/10.1038/ncomms11765 |
genre |
North Atlantic Deep Water North Atlantic |
genre_facet |
North Atlantic Deep Water North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/44216/1/ncomms11765.pdf Howe, J. N. W., Piotrowski, A. M., Noble, T. L., Mulitza, S., Chiessi, C. M. and Bayon, G. (2016) North Atlantic Deep Water Production during the Last Glacial Maximum. Open Access Nature Communications, 7 . Art.Nr. 11765. DOI 10.1038/ncomms11765 <https://doi.org/10.1038/ncomms11765>. doi:10.1038/ncomms11765 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/ncomms11765 |
container_title |
Nature Communications |
container_volume |
7 |
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1 |
_version_ |
1775352924406284288 |