Hydrographic changes in the eastern subpolar North Atlantic during the last deglaciation
Author Posting. © The Author(s), 2010. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Quaternary Science Reviews 29 (2010): 3336-3345, doi:10.1016/j.quascirev.2010.08.01...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/4195 2023-05-15T16:30:03+02:00 Hydrographic changes in the eastern subpolar North Atlantic during the last deglaciation Benway, Heather M. McManus, Jerry F. Oppo, Delia W. Cullen, James L. 2010-08 application/pdf https://hdl.handle.net/1912/4195 en_US eng http://hurricane.ncdc.noaa.gov/pls/paleox/f?p=519:1:3886209056878734::::P1_STUDY_ID:14413 https://doi.org/10.1016/j.quascirev.2010.08.013 https://hdl.handle.net/1912/4195 Preprint 2010 ftwhoas https://doi.org/10.1016/j.quascirev.2010.08.013 2022-05-28T22:58:13Z Author Posting. © The Author(s), 2010. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Quaternary Science Reviews 29 (2010): 3336-3345, doi:10.1016/j.quascirev.2010.08.013. Millennial-scale climate fluctuations of the last deglaciation have been tied to abrupt changes in the Atlantic Meridional Overturning Circulation (MOC). A key to understanding mechanisms of MOC collapse and recovery is the documentation of upper ocean hydrographic changes in the vicinity of North Atlantic deep convection sites. Here we present new high-resolution ocean temperature and δ18Osw records spanning the last deglaciation from an eastern subpolar North Atlantic site that lies along the flow path of the North Atlantic Current, approaching deep convection sites in the Labrador and Greenland-Iceland-Norwegian (GIN) Seas. High-resolution temperature and δ18Osw records from subpolar Site 980 help track the movement of the subpolar/subtropical front associated with temperature and Atlantic MOC changes throughout the last deglaciation. Distinct δ18Osw minima during Heinrich-1 (H1) and the Younger Dryas (YD) correspond with peaks in ice-rafted debris and periods of reduced Atlantic MOC, indicating the presence of melt water in this region that could have contributed to MOC reductions during these intervals. Increased tropical and subtropical δ18Osw during these periods of apparent freshening in the subpolar North Atlantic suggest a buildup of salt at low latitudes that served as a negative feedback on reduced Atlantic MOC. Support for this research was provided by the U.S. National Science Foundation (JFM and DWO) and a postdoctoral scholarship funded in part by the Gary Comer Science and Education Foundation (HB). Report Greenland Iceland north atlantic current North Atlantic Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Greenland Quaternary Science Reviews 29 23-24 3336 3345 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
description |
Author Posting. © The Author(s), 2010. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Quaternary Science Reviews 29 (2010): 3336-3345, doi:10.1016/j.quascirev.2010.08.013. Millennial-scale climate fluctuations of the last deglaciation have been tied to abrupt changes in the Atlantic Meridional Overturning Circulation (MOC). A key to understanding mechanisms of MOC collapse and recovery is the documentation of upper ocean hydrographic changes in the vicinity of North Atlantic deep convection sites. Here we present new high-resolution ocean temperature and δ18Osw records spanning the last deglaciation from an eastern subpolar North Atlantic site that lies along the flow path of the North Atlantic Current, approaching deep convection sites in the Labrador and Greenland-Iceland-Norwegian (GIN) Seas. High-resolution temperature and δ18Osw records from subpolar Site 980 help track the movement of the subpolar/subtropical front associated with temperature and Atlantic MOC changes throughout the last deglaciation. Distinct δ18Osw minima during Heinrich-1 (H1) and the Younger Dryas (YD) correspond with peaks in ice-rafted debris and periods of reduced Atlantic MOC, indicating the presence of melt water in this region that could have contributed to MOC reductions during these intervals. Increased tropical and subtropical δ18Osw during these periods of apparent freshening in the subpolar North Atlantic suggest a buildup of salt at low latitudes that served as a negative feedback on reduced Atlantic MOC. Support for this research was provided by the U.S. National Science Foundation (JFM and DWO) and a postdoctoral scholarship funded in part by the Gary Comer Science and Education Foundation (HB). |
format |
Report |
author |
Benway, Heather M. McManus, Jerry F. Oppo, Delia W. Cullen, James L. |
spellingShingle |
Benway, Heather M. McManus, Jerry F. Oppo, Delia W. Cullen, James L. Hydrographic changes in the eastern subpolar North Atlantic during the last deglaciation |
author_facet |
Benway, Heather M. McManus, Jerry F. Oppo, Delia W. Cullen, James L. |
author_sort |
Benway, Heather M. |
title |
Hydrographic changes in the eastern subpolar North Atlantic during the last deglaciation |
title_short |
Hydrographic changes in the eastern subpolar North Atlantic during the last deglaciation |
title_full |
Hydrographic changes in the eastern subpolar North Atlantic during the last deglaciation |
title_fullStr |
Hydrographic changes in the eastern subpolar North Atlantic during the last deglaciation |
title_full_unstemmed |
Hydrographic changes in the eastern subpolar North Atlantic during the last deglaciation |
title_sort |
hydrographic changes in the eastern subpolar north atlantic during the last deglaciation |
publishDate |
2010 |
url |
https://hdl.handle.net/1912/4195 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Iceland north atlantic current North Atlantic |
genre_facet |
Greenland Iceland north atlantic current North Atlantic |
op_relation |
http://hurricane.ncdc.noaa.gov/pls/paleox/f?p=519:1:3886209056878734::::P1_STUDY_ID:14413 https://doi.org/10.1016/j.quascirev.2010.08.013 https://hdl.handle.net/1912/4195 |
op_doi |
https://doi.org/10.1016/j.quascirev.2010.08.013 |
container_title |
Quaternary Science Reviews |
container_volume |
29 |
container_issue |
23-24 |
container_start_page |
3336 |
op_container_end_page |
3345 |
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1766019769286262784 |