Evidence from the Florida Straits for Younger Dryas Ocean Circulation Changes
The waters passing through the Florida Straits today reflect both the western portion of the wind-driven subtropical gyre and the northward flow of the upper waters which cross the equator, compensating North Atlantic Deep Water export as part of the large-scale Atlantic meridional overturning circu...
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ftolddominionuni:oai:digitalcommons.odu.edu:oeas_fac_pubs-1233 2023-06-11T04:14:15+02:00 Evidence from the Florida Straits for Younger Dryas Ocean Circulation Changes Lynch-Stieglitz, Jean Schmidt, Matthew W. Curry, William B. 2011-01-01T08:00:00Z application/pdf https://digitalcommons.odu.edu/oeas_fac_pubs/206 https://doi.org/10.1029/2010pa002032 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1233/viewcontent/Lynch_Stieglitz_et_al_2011_Paleoceanography.pdf unknown ODU Digital Commons https://digitalcommons.odu.edu/oeas_fac_pubs/206 doi:10.1029/2010pa002032 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1233/viewcontent/Lynch_Stieglitz_et_al_2011_Paleoceanography.pdf OES Faculty Publications Last glacial maximun North Atlantic circulation Thermohaline circulation Radio carbon Gulf Stream Florida Straits Geology Oceanography Paleontology article 2011 ftolddominionuni https://doi.org/10.1029/2010pa002032 2023-05-08T17:59:46Z The waters passing through the Florida Straits today reflect both the western portion of the wind-driven subtropical gyre and the northward flow of the upper waters which cross the equator, compensating North Atlantic Deep Water export as part of the large-scale Atlantic meridional overturning circulation. It has been postulated from various lines of evidence that the overturning circulation was weaker during the Younger Dryas cold event of the last deglaciation. We show here that the contrast in the oxygen isotopic composition of benthic foraminiferal tests across the Florida Current is reduced during the Younger Dryas. This most likely reflects a decrease in the density gradient across the channel and a decrease in the vertical shear of the Florida Current. This reduced shear is consistent with the postulated reduction in the Atlantic meridional overturning circulation. We find that the onset of this change in density structure and flow at the start of the Younger Dryas is very abrupt, occurring in less than 70 years. Article in Journal/Newspaper North Atlantic Deep Water North Atlantic Old Dominion University: ODU Digital Commons Paleoceanography 26 1 |
institution |
Open Polar |
collection |
Old Dominion University: ODU Digital Commons |
op_collection_id |
ftolddominionuni |
language |
unknown |
topic |
Last glacial maximun North Atlantic circulation Thermohaline circulation Radio carbon Gulf Stream Florida Straits Geology Oceanography Paleontology |
spellingShingle |
Last glacial maximun North Atlantic circulation Thermohaline circulation Radio carbon Gulf Stream Florida Straits Geology Oceanography Paleontology Lynch-Stieglitz, Jean Schmidt, Matthew W. Curry, William B. Evidence from the Florida Straits for Younger Dryas Ocean Circulation Changes |
topic_facet |
Last glacial maximun North Atlantic circulation Thermohaline circulation Radio carbon Gulf Stream Florida Straits Geology Oceanography Paleontology |
description |
The waters passing through the Florida Straits today reflect both the western portion of the wind-driven subtropical gyre and the northward flow of the upper waters which cross the equator, compensating North Atlantic Deep Water export as part of the large-scale Atlantic meridional overturning circulation. It has been postulated from various lines of evidence that the overturning circulation was weaker during the Younger Dryas cold event of the last deglaciation. We show here that the contrast in the oxygen isotopic composition of benthic foraminiferal tests across the Florida Current is reduced during the Younger Dryas. This most likely reflects a decrease in the density gradient across the channel and a decrease in the vertical shear of the Florida Current. This reduced shear is consistent with the postulated reduction in the Atlantic meridional overturning circulation. We find that the onset of this change in density structure and flow at the start of the Younger Dryas is very abrupt, occurring in less than 70 years. |
format |
Article in Journal/Newspaper |
author |
Lynch-Stieglitz, Jean Schmidt, Matthew W. Curry, William B. |
author_facet |
Lynch-Stieglitz, Jean Schmidt, Matthew W. Curry, William B. |
author_sort |
Lynch-Stieglitz, Jean |
title |
Evidence from the Florida Straits for Younger Dryas Ocean Circulation Changes |
title_short |
Evidence from the Florida Straits for Younger Dryas Ocean Circulation Changes |
title_full |
Evidence from the Florida Straits for Younger Dryas Ocean Circulation Changes |
title_fullStr |
Evidence from the Florida Straits for Younger Dryas Ocean Circulation Changes |
title_full_unstemmed |
Evidence from the Florida Straits for Younger Dryas Ocean Circulation Changes |
title_sort |
evidence from the florida straits for younger dryas ocean circulation changes |
publisher |
ODU Digital Commons |
publishDate |
2011 |
url |
https://digitalcommons.odu.edu/oeas_fac_pubs/206 https://doi.org/10.1029/2010pa002032 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1233/viewcontent/Lynch_Stieglitz_et_al_2011_Paleoceanography.pdf |
genre |
North Atlantic Deep Water North Atlantic |
genre_facet |
North Atlantic Deep Water North Atlantic |
op_source |
OES Faculty Publications |
op_relation |
https://digitalcommons.odu.edu/oeas_fac_pubs/206 doi:10.1029/2010pa002032 https://digitalcommons.odu.edu/context/oeas_fac_pubs/article/1233/viewcontent/Lynch_Stieglitz_et_al_2011_Paleoceanography.pdf |
op_doi |
https://doi.org/10.1029/2010pa002032 |
container_title |
Paleoceanography |
container_volume |
26 |
container_issue |
1 |
_version_ |
1768392125204922368 |