Last glacial maximum ocean thermohaline circulation: PMIP2 model intercomparisons and data constraints
The ocean thermohaline circulation is important for transports of heat and the carbon cycle. We present results from PMIP2 coupled atmosphere-ocean simulations with four climate models that are also being used for future assessments. These models give very different glacial thermohaline circulations...
Published in: | Geophysical Research Letters |
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Language: | English |
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American Geophysical Union
2007
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Online Access: | http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-964 https://doi.org/10.1029/2007GL029475 |
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ftncar:oai:drupal-site.org:articles_6665 2023-10-01T03:50:55+02:00 Last glacial maximum ocean thermohaline circulation: PMIP2 model intercomparisons and data constraints Otto-Bliesner, Bette (author) Hewitt, C. (author) Marchitto, T. (author) Brady, Esther (author) Abe-Ouchi, A. (author) Crucifix, M. (author) Murakami, S. (author) Weber, S. (author) 2007-06-20 application/pdf http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-964 https://doi.org/10.1029/2007GL029475 en eng American Geophysical Union Geophysical Research Letters http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-964 doi:10.1029/2007GL029475 ark:/85065/d77081n8 Copyright 2007 American Geophysical Union. Text article 2007 ftncar https://doi.org/10.1029/2007GL029475 2023-09-04T18:22:26Z The ocean thermohaline circulation is important for transports of heat and the carbon cycle. We present results from PMIP2 coupled atmosphere-ocean simulations with four climate models that are also being used for future assessments. These models give very different glacial thermohaline circulations even with comparable circulations for present. An integrated approach using results from these simulations for Last Glacial Maximum (LGM) with proxies of the state of the glacial surface and deep Atlantic supports the interpretation from nutrient tracers that the boundary between North Atlantic Deep Water and Antarctic Bottom Water was much shallower during this period. There is less constraint from this integrated reconstruction regarding the strength of the LGM North Atlantic overturning circulation, although together they suggest that it was neither appreciably stronger nor weaker than modern. Two model simulations identify a role for sea ice in both hemispheres in driving the ocean response to glacial forcing. Article in Journal/Newspaper Antarc* Antarctic North Atlantic Deep Water North Atlantic Sea ice OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Antarctic Geophysical Research Letters 34 12 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
The ocean thermohaline circulation is important for transports of heat and the carbon cycle. We present results from PMIP2 coupled atmosphere-ocean simulations with four climate models that are also being used for future assessments. These models give very different glacial thermohaline circulations even with comparable circulations for present. An integrated approach using results from these simulations for Last Glacial Maximum (LGM) with proxies of the state of the glacial surface and deep Atlantic supports the interpretation from nutrient tracers that the boundary between North Atlantic Deep Water and Antarctic Bottom Water was much shallower during this period. There is less constraint from this integrated reconstruction regarding the strength of the LGM North Atlantic overturning circulation, although together they suggest that it was neither appreciably stronger nor weaker than modern. Two model simulations identify a role for sea ice in both hemispheres in driving the ocean response to glacial forcing. |
author2 |
Otto-Bliesner, Bette (author) Hewitt, C. (author) Marchitto, T. (author) Brady, Esther (author) Abe-Ouchi, A. (author) Crucifix, M. (author) Murakami, S. (author) Weber, S. (author) |
format |
Article in Journal/Newspaper |
title |
Last glacial maximum ocean thermohaline circulation: PMIP2 model intercomparisons and data constraints |
spellingShingle |
Last glacial maximum ocean thermohaline circulation: PMIP2 model intercomparisons and data constraints |
title_short |
Last glacial maximum ocean thermohaline circulation: PMIP2 model intercomparisons and data constraints |
title_full |
Last glacial maximum ocean thermohaline circulation: PMIP2 model intercomparisons and data constraints |
title_fullStr |
Last glacial maximum ocean thermohaline circulation: PMIP2 model intercomparisons and data constraints |
title_full_unstemmed |
Last glacial maximum ocean thermohaline circulation: PMIP2 model intercomparisons and data constraints |
title_sort |
last glacial maximum ocean thermohaline circulation: pmip2 model intercomparisons and data constraints |
publisher |
American Geophysical Union |
publishDate |
2007 |
url |
http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-964 https://doi.org/10.1029/2007GL029475 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic North Atlantic Deep Water North Atlantic Sea ice |
genre_facet |
Antarc* Antarctic North Atlantic Deep Water North Atlantic Sea ice |
op_relation |
Geophysical Research Letters http://nldr.library.ucar.edu/repository/collections/OSGC-000-000-003-964 doi:10.1029/2007GL029475 ark:/85065/d77081n8 |
op_rights |
Copyright 2007 American Geophysical Union. |
op_doi |
https://doi.org/10.1029/2007GL029475 |
container_title |
Geophysical Research Letters |
container_volume |
34 |
container_issue |
12 |
_version_ |
1778529293883670528 |