Orca Basin MD02-2550 Deglacial Mg/Ca SST Data Williams, C.; Flower, B.P.; Hastings, D.W.; Guilderson, T.P.; Quinn, K.A.; Goddard, E. Williams, C. Flower, B.P. Hastings, D.W. Guilderson, T.P. Quinn, K.A. Goddard, E. Sea Surface Temperature Reconstruction earth science/paleoclimate/paleoceanography (aluminum/calcium,Globigerinoides ruber white,null,micromole per mole,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (magnesium/calcium,Globigerinoides ruber white,null,millimole per mole,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (manganese/calcium,Globigerinoides ruber pink,null,micromole per mole,null,paleoceanography,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleoceanography (delta 18O,delta 18O|magnesium/calcium|sea water,null,per mil,null,climate reconstructions|paleoceanography,null,null,N,G. ruber white) earth science/paleoclimate/paleoceanography (manganese/calcium,Globigerinoides ruber white,null,micromole per mole,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (magnesium/calcium,Globigerinoides ruber pink,null,millimole per mole,null,paleoceanography,null,null,N,null) earth science/paleoclimate/paleoceanography (delta 18O,Globigerinoides ruber white,null,per mil,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,G. ruber white) earth science/paleoclimate/climate reconstructions|paleoceanography (sea surface temperature,magnesium/calcium,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,G. ruber pink) earth science/paleoclimate/paleoceanography (aluminum/calcium,Globigerinoides ruber pink,null,micromole per mole,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 (MD02-2550>LATITUDE 26.9463>LONGITUDE -91.3458) During the last deglaciation, Greenland ice core and North Atlantic sediment records exhibit multiple abrupt climate events including the Younger Dryas cold episode (12.9-11.7 ka). However, evidence for the presence of the Younger Dryas in the Gulf of Mexico (GOM) and the relationship between GOM sea surface temperature (SST) and high-latitude climate change is less clear. We present new Mg/Ca-SST records from two varieties of the planktonic foraminifer Globigerinoides ruber (white and pink) to assess northern GOM SST history from approximately 18.4-10.8 ka. Thirty-five accelerator mass spectrometry (AMS) 14C dates from Orca Basin core MD02-2550 provide excellent age control and document high sedimentation rates (~40 cm/kyr). G. ruber (white and pink) Mg/Ca-SST data exhibit increases (~4.6 ± 0.6°C and ~2.2 ± 0.5°C, respectively) from at least 17.8-16.6 ka, with nearly decadal resolution that are early relative to the onset of the Bolling-Allerod interstadial. Moreover, G. ruber (white) SST decreases at 16.0-14.7 ka (~1.0 ± 0.5°C) and 12.8-11.6 ka (~2.4 ± 0.6°C) correlate to the Oldest and Younger Dryas in Greenland and Cariaco Basin. The G. ruber (pink) SST record, which reflects differences in seasonality and/or depth habitat, is often not in phase with G. ruber (white) and closely resembles Antarctic air temperature records. Overall, it appears that Orca Basin SST records follow Antarctic air temperature early in the deglacial sequence and exhibit enhanced seasonality during Greenland stadials. STUDY NOTES: High resolution foraminiferal Mg/Ca data and SST reconstructions for the deglacial period for a core from the Orca Basin, northern Gulf of Mexico. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Williams, C. Investigator : Flower, B.P. Investigator : Hastings, D.W. Investigator : Guilderson, T.P. Investigator : Quinn, K.A. Investigator : Goddard, E. 2011-01-02 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/10414 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/williams2010/williams2010.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/williams2010/williams2010.xls https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/williams2010/williams2010.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/williams2010/williams2010.xls English https://www.ncdc.noaa.gov/paleo/study/10414 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/williams2010/williams2010.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/williams2010/williams2010.xls Williams, C., B.P. Flower, D.W. Hastings, T.P. Guilderson, K.A. Quinn, and E.A. Goddard. 2010. Deglacial abrupt climate change in the Atlantic Warm Pool: A Gulf of Mexico perspective. Paleoceanography, 25, PA4221, doi:10.1029/2010PA001928 START YEAR: 18380 cal yr BP * END YEAR: 10759 cal yr BP -91.3458 26.9463 -91.3458 26.9463