Florida Straits 41KYr Foraminiferal Stable Isotope Data Lynch-Stieglitz, J.; Schmidt, M.W.; Curry, W.B. Lynch-Stieglitz, J. Schmidt, M.W. Curry, W.B. Meridional Overturning Circulation (MOC) earth science/paleoclimate/paleoceanography (delta 18O,benthic foraminifer,null,per mil PDB,null,paleoceanography,averaged,null,N,null) earth science/paleoclimate/paleoceanography (notes,null,null,null,null,paleoceanography,null,null,C,foram species analyzed) earth science/paleoclimate/paleoceanography (age,null,null,calendar year before present,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 13C,benthic foraminifer,null,per mil PDB,null,paleoceanography,averaged,null,N,null) earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (KNR166-2-73GGC>LATITUDE 23.7455>LONGITUDE -79.429667) (KNR166-2-127JPC>LATITUDE 24.7638>LONGITUDE -79.2657) 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. STUDY NOTES: Foraminiferal stable isotope data from 6 sediment cores collected from the Florida Straits. Some of the stable isotope data has been previously published in Lynch-Stieglitz et al. (2009) and Came et al. (2007, 2008), and is presented here along with additional isotopic data and up to date age models based on the dates listed in Table 2. Some missing data and typographic errors in Table 2 have now been corrected. This file contains the corrected data and supersedes the table published in the paper. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Lynch-Stieglitz, J. Investigator : Schmidt, M.W. Investigator : Curry, W.B. 2011-05-25 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/11208 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lynch-stieglitz2011/lynch-stieglitz2011.xls https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lynch-stieglitz2011/lynch-stieglitz2011.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lynch-stieglitz2011/lynch-stieglitz2011.xls https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lynch-stieglitz2011/lynch-stieglitz2011.txt English https://www.ncdc.noaa.gov/paleo/study/11208 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lynch-stieglitz2011/lynch-stieglitz2011.xls https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/lynch-stieglitz2011/lynch-stieglitz2011.txt Lynch-Stieglitz, J., M.W. Schmidt, and W.B. Curry. 2011. Evidence from the Florida Straits for Younger Dryas ocean circulation changes. Paleoceanography, 26, PA1205, doi:10.1029/2010PA002032 START YEAR: 41614 cal yr BP * END YEAR: 297 cal yr BP -79.429667 23.7455 -79.2657 24.7638