Gulf Stream Holocene/Last Glacial Maximum Planktonic Foraminifera Stable Isotope Data Matsumoto, K.; Lynch-Stieglitz, J. Matsumoto, K. Lynch-Stieglitz, J. earth science/paleoclimate/paleoceanography (delta 13C,Trilobatus sacculifer,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 18O,Trilobatus sacculifer,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 13C,Globorotalia truncatulinoides,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (number of samples,null,null,count,null,paleoceanography,null,null,N,Number of G. truncatulinoides in analysis) earth science/paleoclimate/paleoceanography (delta 18O,Globorotalia truncatulinoides,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 13C,Globigerinoides ruber,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (depth,null,null,centimeter,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 18O,Globigerinoides ruber,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (V21-2>LATITUDE 36.07>LONGITUDE -70.4) (K140-2 JPC22>LATITUDE 28.25>LONGITUDE -74.4) (RC10-289>LATITUDE 37.03>LONGITUDE -72.52) (KZ81-10G>LATITUDE 37.7>LONGITUDE -73.93) (V26-177>LATITUDE 37.55>LONGITUDE -72.57) (K140-2 GGC50>LATITUDE 32.75>LONGITUDE -76.25) (V21-1>LATITUDE 38.72>LONGITUDE -72.65) (V26-175>LATITUDE 33.93>LONGITUDE -74.43) (V30-5>LATITUDE 34.62>LONGITUDE -74.65) (V26-176>LATITUDE 36.05>LONGITUDE -72.37) (V4-1>LATITUDE 38.88>LONGITUDE -70.9) (V15-212>LATITUDE 39>LONGITUDE -72.13) We present stable oxygen isotope ratio (delta18O) measurements on deep-dwelling planktonic foraminifera from the western margin of the North Atlantic in order to reconstruct the latitude at which the Gulf Stream separated from the western boundary of the Atlantic Ocean in the past. The modern separation latitude can be reconstructed within one degree from delta18O measured on the fossil shells of deep-dwelling planktonic foraminifera Globorotalia truncatulinoides from the Holocene sediments representing the past 10,000 years of mild climate conditions similar to today. The separation latitude is captured in a sharp delta18O gradient, which reflects the prominent hydrographic change across the boundary between the warm waters south and east of the Gulf Stream and the cold Slope Water to the north. The latitudinal delta18O profile from approximately the Last Glacial Maximum shows that the Gulf Stream separated from the coast near Cape Hatteras at almost the same latitude as it does today. We assess our finding in light of existing Gulf Stream separation theories and conclude that one of the theories, the wind-induced separation mechanism, is not consistent with our paleoceanographic reconstruction. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Matsumoto, K. Investigator : Lynch-Stieglitz, J. 2003-07-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/6418 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/rc10-289-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v21-2-m-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v26-176m-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/ggc50-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/k2-jpc22-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v26-175-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/matsumoto2003 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/kz81-10g-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v21-1-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v15-212-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v26-177-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v30-5-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v4-1-m-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/rc10-289-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v21-2-m-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v26-176m-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/ggc50-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/k2-jpc22-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v26-175-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/matsumoto2003 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/kz81-10g-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v21-1-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v15-212-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v26-177-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v30-5-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v4-1-m-tab.txt English https://www.ncdc.noaa.gov/paleo/study/6418 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/rc10-289-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v21-2-m-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v26-176m-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/ggc50-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/k2-jpc22-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v26-175-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/matsumoto2003 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/kz81-10g-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v21-1-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v15-212-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v26-177-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v30-5-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/v4-1-m-tab.txt Matsumoto, K., and J. Lynch-Stieglitz. 2003. Persistence of Gulf Stream separation during the Last Glacial Period: Implications for current separation theories. J. Geophys. Res., 108(C6), 3174. START YEAR: -999 14C yr BP * END YEAR: -999 14C yr BP -76.25 28.25 -70.4 39