Orca Basin, Gulf of Mexico MD02-2551 d18O and Mg/Ca Data During the Last Glaciation Hill, H.W.; Flower, B.P.; Quinn, T.M.; Hollander, D.J.; Guilderson, T.P. Hill, H.W. Flower, B.P. Quinn, T.M. Hollander, D.J. Guilderson, T.P. Other Hydroclimate Reconstruction Sea Surface Temperature Reconstruction earth science/paleoclimate/climate reconstructions|paleoceanography (delta 18O,delta 18O|magnesium/calcium|sea water,null,per mil VSMOW,null,climate reconstructions|paleoceanography,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleoceanography (delta 18O,delta 18O|magnesium/calcium|sea water,null,per mil VSMOW,null,climate reconstructions|paleoceanography,corrected,null,N,corrected for ice volume) earth science/paleoclimate/paleoceanography (delta 18O,Globigerinoides ruber pink,null,per mil PDB,null,paleoceanography,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleoceanography (sea surface temperature,magnesium/calcium,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (age,null,null,calendar year before present,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (magnesium/calcium,Globigerinoides ruber pink,null,dimensionless,null,paleoceanography,null,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 earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (MD02-2551>LATITUDE 26.95>LONGITUDE -91.35) A leading hypothesis to explain abrupt climate change during the last glacial cycle calls on fluctuations in the margin of the North American Laurentide Ice Sheet (LIS), which may have routed fresh water between the Gulf of Mexico (GOM) and the North Atlantic, affecting North Atlantic Deep Water variability and regional climate. Paired measurements of d18O and Mg/Ca of foraminiferal calcite from GOM sediments reveal five episodes of LIS meltwater input from 28 to 45 thousand years ago (ka) that do not match the millennial-scale Dansgaard-Oeschger warmings recorded in Greenland ice. We suggest that summer melting of the LIS may occur during Antarctic warming and likely contributed to sea level variability during marine isotope stage 3. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Hill, H.W. Investigator : Flower, B.P. Investigator : Quinn, T.M. Investigator : Hollander, D.J. Investigator : Guilderson, T.P. 2006-07-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/2641 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/md2-2551-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hill2006 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/md2-2551-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hill2006 English https://www.ncdc.noaa.gov/paleo/study/2641 https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/sediment_files/complete/md2-2551-tab.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/hill2006 Hill, H.W., B.P. Flower, T.M. Quinn, D.J. Hollander, and T.P. Guilderson. 2006. Laurentide Ice Sheet meltwater and abrupt climate change during the last glaciation. Paleoceanography 21, PA1006. START YEAR: 44461 cal yr BP * END YEAR: 23220 cal yr BP -91.35 26.95 -91.35 26.95