noaa-ocean-26630 High-resolution (decadal-scale) deglacial planktonic oxygen isotope records from the Gulf of Alaska Praetorius, S.K.; Mix, A.C. High-resolution (decadal-scale) deglacial planktonic oxygen isotope records from the Gulf of Alaska 2019-04-15 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/26630 Investigator S.K. Praetorius Investigator A.C. Mix earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean age control geoscientificInformation 18170 cal yr BP 400 cal yr BP Complete 56.96 59.555 -144.1535 -136.43 -1623 -426 Ocean Pacific Ocean North Pacific Ocean Gulf Of Alaska EW0408-26TC/JC, 66JC, 85JC>LATITUDE >LONGITUDE Ocean Pacific Ocean North Pacific Ocean Gulf Of Alaska EW0408-85JC>LATITUDE 59.555>LONGITUDE -144.1535 Ocean Pacific Ocean North Pacific Ocean Gulf Of Alaska EW0408-26TC/JC>LATITUDE 56.96>LONGITUDE -136.43 Ocean Pacific Ocean North Pacific Ocean Gulf Of Alaska EW0408-66JC>LATITUDE 57.872382>LONGITUDE -137.10446 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Praetorius, S.K. and A.C. Mix 2014 Science 345 444-448 10.1126/science.1252000 Davies, M.H., A.C. Mix, J.S. Stoner, J.A. Addison, J. Jaeger, B. Finney, and J. Wiest 2011 Paleoceanography 26 PA2223 10.1029/2010PA002051

Oxygen isotope data from planktonic and benthic foraminifera, on a high-resolution age model (44 14C dates spanning 17,400 years), document deglacial environmental change on the southeast Alaska margin (59°33.32'N, 144°9.21'W, 682 m water depth). Surface freshening (i.e., d18O reduction of 0.8‰) began at 16,650 ± 170 cal years B.P. during an interval of ice proximal sedimentation, likely due to freshwater input from melting glaciers. A sharp transition to laminated hemipelagic sediments constrains retreat of regional outlet glaciers onto land circa 14,790 ± 380 cal years B.P. Abrupt warming and/or freshening of the surface ocean (i.e., additional d18O reduction of 0.9‰) coincides with the Bølling Interstade of northern Europe and Greenland. Cooling and/or higher salinities returned during the Allerød interval, coincident with the Antarctic Cold Reversal, and continue until 11,740 ± 200 cal years B.P., when onset of warming coincides with the end of the Younger Dryas. An abrupt 1‰ reduction in benthic d18O at 14,250 ± 290 cal years B.P. likely reflects a decrease in bottom water salinity driven by deep mixing of glacial meltwater, a regional megaflood event, or brine formation associated with sea ice. Two laminated opal-rich intervals record discrete episodes of high productivity during the last deglaciation. These events, precisely dated here at 14,790 ± 380 to 12,990 ± 190 cal years B.P. and 11,160 ± 130 to 10,750 ± 220 cal years B.P., likely correlate to similar features observed elsewhere on the margins of the North Pacific and are coeval with episodes of rapid sea level rise. Remobilization of iron from newly inundated continental shelves may have helped to fuel these episodes of elevated primary productivity and sedimentary anoxia. STUDY NOTES: Gulf of Alaska planktonic oxygen isotope records. The data for Neogloboquadrina pachyderma sinistral (Nps) and Globigerina bulloides (Gb) for each of the three core sites is tabulated in separate excel sheets, along with the composite records on the original and tuned age models. Data is listed as depth in core. The age controls based on the calibrated radiocarbon dates and the age controls for the tuned age model are listed in separate excel sheets. No tuning was applied to the age model of EW0408-85JC for the composite records presented here. Marine reservoir ages applied to the Marine13 radiocarbon calibration are 595 + 50 yrs for EW0408-66JC, 735 + 50 yrs for EW0408-26JC, and 800 + 50 yrs for EW0408-85JC. Data from core EW0408-85JC are previously published in Davies et al. (2011). The d18O of core EW0408-66JC was corrected with an offset of +0.3 o/oo from 4-11 ka and +0.4 o/oo from 11-13.5 ka in order to adjust for differences in the d18O of seawater (related to salinity) between sites. Data was linearly interpolated on a 25 yr timestep to make the composite records. Provided Keywords: North Pacific, deglacial, abrupt climate change

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2014/praetorius2014-composite-gbull.txt NOAA Template File; Composite G. bulloides d18O Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2014/praetorius2014-composite-nps.txt NOAA Template File; Composite N. pachyderma sinistral d18O Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2014/praetorius2014-85jc-plank.txt NOAA Template File; EW0408-85JC Planktic Forams d18O Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2014/praetorius2014-agecontrol.txt NOAA Template File; Composite Age Control Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2014/praetorius2014-26tc_jc-nps.txt NOAA Template File; EW0408-26TC/JC N. pachyderma sinistral d18O Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2014/praetorius2014-66jc-nps.txt NOAA Template File; EW0408-66JC N. pachyderma sinistral d18O Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2014/praetorius2014-26tc_jc-gbull.txt NOAA Template File; EW0408-26TC/JC G. bulloides d18O Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2014/praetorius2014-66jc-gbull.txt NOAA Template File; EW0408-66JC G. bulloides d18O Data USA/NOAA DIF Version 9.8.4 2019-04-22 2019-04-22