Holocene sedimentary radiogenic nuclide and sortable silt records from the Carolina Slope Hoffmann, S.S.; McManus, J.F.; Swank, E. Hoffmann, S.S. McManus, J.F. Swank, E. earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (KN140-2-51>LATITUDE 32.78>LONGITUDE -76.283) While substantial changes in thermohaline circulation related to deglacial climate variability are well established, the role of this circulation in Holocene climate variability remains uncertain. Here we use two dynamical proxies, 231Pa/230Th ratios and mean sortable silt size (SS), to reconstruct Holocene bottom water circulation at the intermediate-depth Carolina Slope. We find no substantial change in deep current speed or 231Pa export at this site during the Holocene, suggesting consistent 231Pa export via the Deep Western Boundary Current. SS shows increasing millennial-scale variability in the middle-late Holocene, which may reflect Labrador Sea Water contribution to current speed. We conclude that deepwater export from the North Atlantic has remained remarkably stable during the Holocene, decoupled from changing rates of specific water masses, while production of these water masses varied at millennial to centennial time scales. The persistence of the large-scale overturning may reflect the ocean's stabilizing influence on Holocene climate. STUDY NOTES: Provided Keywords: Holocene, sediment geochemistry, sediment grain size NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Hoffmann, S.S. Investigator : McManus, J.F. Investigator : Swank, E. 2019-03-04 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/26330 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hoffmann2018/hoffmann2018-silt.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hoffmann2018/hoffmann2018-radiogenic.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hoffmann2018/hoffmann2018-silt.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hoffmann2018/hoffmann2018-radiogenic.txt English https://www.ncdc.noaa.gov/paleo/study/26330 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hoffmann2018/hoffmann2018-silt.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hoffmann2018/hoffmann2018-radiogenic.txt Hoffmann, S.S., J.F. McManus, and E. Swank2018Evidence for stable Holocene basin-scale overturning circulation despite variable currents along the Deep Western Boundary Current of the North Atlantic OceanGeophysical Research Letters452413427-1343610.1029/2018GL080187 START YEAR: 11190 cal yr BP * END YEAR: 90 cal yr BP -76.283 32.78 -76.283 32.78