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...
| Main Authors: | , |
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| Format: | Article |
| Language: | en_US |
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American Meteorological Society
2014
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| Online Access: | http://hdl.handle.net/1721.1/89090 https://orcid.org/0000-0001-6808-3664 |
| _version_ | 1826206944401031168 |
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| author | Dail, Holly Janine Wunsch, Carl Isaac |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Dail, Holly Janine Wunsch, Carl Isaac |
| author_sort | Dail, Holly Janine |
| collection | MIT |
| 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. |
| first_indexed | 2024-09-23T13:41:02Z |
| format | Article |
| id | mit-1721.1/89090 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:41:02Z |
| publishDate | 2014 |
| publisher | American Meteorological Society |
| record_format | dspace |
| spelling | mit-1721.1/890902024-05-15T03:26:46Z Dynamical Reconstruction of Upper-Ocean Conditions in the Last Glacial Maximum Atlantic Dail, Holly Janine Wunsch, Carl Isaac Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Dail, Holly Janine Wunsch, Carl 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) 2014-08-28T16:43:43Z 2014-08-28T16:43:43Z 2014-01 2013-08 Article http://purl.org/eprint/type/JournalArticle 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 https://orcid.org/0000-0001-6808-3664 en_US http://dx.doi.org/10.1175/JCLI-D-13-00211.1 Journal of Climate 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. application/pdf American Meteorological Society American Meteorological Society |
| spellingShingle | Dail, Holly Janine Wunsch, Carl Isaac Dynamical Reconstruction of Upper-Ocean Conditions in the Last Glacial Maximum Atlantic |
| title | 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_short | 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 |
| url | http://hdl.handle.net/1721.1/89090 https://orcid.org/0000-0001-6808-3664 |
| work_keys_str_mv | AT dailhollyjanine dynamicalreconstructionofupperoceanconditionsinthelastglacialmaximumatlantic AT wunschcarlisaac dynamicalreconstructionofupperoceanconditionsinthelastglacialmaximumatlantic |