Dynamical Reconstruction of Upper-Ocean Conditions in the Last Glacial Maximum Atlantic
Proxies indicate that the Last Glacial Maximum (LGM) Atlantic Ocean was marked by increased meridional and zonal near sea surface temperature gradients relative to today. Using a least squares fit of a full general circulation and sea ice model to upper-ocean proxy data with specified error estimate...
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American Meteorological Society
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ftmit:oai:dspace.mit.edu:1721.1/89090 2023-06-11T04:16:35+02:00 Dynamical Reconstruction of Upper-Ocean Conditions in the Last Glacial Maximum Atlantic Wunsch, Carl Dail, Holly Janine Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Dail, Holly Janine Wunsch, Carl 2013-08 application/pdf http://hdl.handle.net/1721.1/89090 en_US eng American Meteorological Society http://dx.doi.org/10.1175/JCLI-D-13-00211.1 Journal of Climate 0894-8755 1520-0442 http://hdl.handle.net/1721.1/89090 Dail, Holly, and Carl Wunsch. “Dynamical Reconstruction of Upper-Ocean Conditions in the Last Glacial Maximum Atlantic.” J. Climate 27, no. 2 (January 2014): 807–823. © 2014 American Meteorological Society orcid:0000-0001-6808-3664 Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. American Meteorological Society Article http://purl.org/eprint/type/JournalArticle 2013 ftmit https://doi.org/10.1175/JCLI-D-13-00211.1 2023-05-29T08:37:18Z Proxies indicate that the Last Glacial Maximum (LGM) Atlantic Ocean was marked by increased meridional and zonal near sea surface temperature gradients relative to today. Using a least squares fit of a full general circulation and sea ice model to upper-ocean proxy data with specified error estimates, a seasonally varying reconstruction is sought of the Atlantic Ocean state that is consistent with both the known dynamics and the data. With reasonable uncertainty assumptions for the observations and the adjustable (control) variables, a consistent LGM ocean state is found, one not radically different from the modern one. Inferred changes include a strengthening of the easterly and westerly winds, leading to strengthened subtropical and subpolar gyres, and increased upwelling favorable winds off the coast of Africa, leading to particularly cold SSTs in those regions. American Society for Engineering Education. National Defense Science and Engineering Graduate Fellowship National Science Foundation (U.S.) (Award OCE-0645936) National Science Foundation (U.S.) (Award OCE-1060735) Article in Journal/Newspaper Sea ice DSpace@MIT (Massachusetts Institute of Technology) Journal of Climate 27 2 807 823 |
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Open Polar |
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DSpace@MIT (Massachusetts Institute of Technology) |
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ftmit |
language |
English |
description |
Proxies indicate that the Last Glacial Maximum (LGM) Atlantic Ocean was marked by increased meridional and zonal near sea surface temperature gradients relative to today. Using a least squares fit of a full general circulation and sea ice model to upper-ocean proxy data with specified error estimates, a seasonally varying reconstruction is sought of the Atlantic Ocean state that is consistent with both the known dynamics and the data. With reasonable uncertainty assumptions for the observations and the adjustable (control) variables, a consistent LGM ocean state is found, one not radically different from the modern one. Inferred changes include a strengthening of the easterly and westerly winds, leading to strengthened subtropical and subpolar gyres, and increased upwelling favorable winds off the coast of Africa, leading to particularly cold SSTs in those regions. American Society for Engineering Education. National Defense Science and Engineering Graduate Fellowship National Science Foundation (U.S.) (Award OCE-0645936) National Science Foundation (U.S.) (Award OCE-1060735) |
author2 |
Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Dail, Holly Janine Wunsch, Carl |
format |
Article in Journal/Newspaper |
author |
Wunsch, Carl Dail, Holly Janine |
spellingShingle |
Wunsch, Carl Dail, Holly Janine Dynamical Reconstruction of Upper-Ocean Conditions in the Last Glacial Maximum Atlantic |
author_facet |
Wunsch, Carl Dail, Holly Janine |
author_sort |
Wunsch, Carl |
title |
Dynamical Reconstruction of Upper-Ocean Conditions in the Last Glacial Maximum Atlantic |
title_short |
Dynamical Reconstruction of Upper-Ocean Conditions in the Last Glacial Maximum Atlantic |
title_full |
Dynamical Reconstruction of Upper-Ocean Conditions in the Last Glacial Maximum Atlantic |
title_fullStr |
Dynamical Reconstruction of Upper-Ocean Conditions in the Last Glacial Maximum Atlantic |
title_full_unstemmed |
Dynamical Reconstruction of Upper-Ocean Conditions in the Last Glacial Maximum Atlantic |
title_sort |
dynamical reconstruction of upper-ocean conditions in the last glacial maximum atlantic |
publisher |
American Meteorological Society |
publishDate |
2013 |
url |
http://hdl.handle.net/1721.1/89090 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
American Meteorological Society |
op_relation |
http://dx.doi.org/10.1175/JCLI-D-13-00211.1 Journal of Climate 0894-8755 1520-0442 http://hdl.handle.net/1721.1/89090 Dail, Holly, and Carl Wunsch. “Dynamical Reconstruction of Upper-Ocean Conditions in the Last Glacial Maximum Atlantic.” J. Climate 27, no. 2 (January 2014): 807–823. © 2014 American Meteorological Society orcid:0000-0001-6808-3664 |
op_rights |
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. |
op_doi |
https://doi.org/10.1175/JCLI-D-13-00211.1 |
container_title |
Journal of Climate |
container_volume |
27 |
container_issue |
2 |
container_start_page |
807 |
op_container_end_page |
823 |
_version_ |
1768374961110515712 |