noaa-ocean-22400 Alkenone paleotemperature estimates, d18O seawater data, and coarse fraction data from the Gulf of Alaska spanning the past 18,000 years Praetorius, S.K.; Mix, A.C.; Jensen, B.; Froese, D.; Milne, G.A.; Wolhowe, M.D.; Addison, J.A.; Prahl, F.G. Alkenone paleotemperature estimates, d18O seawater data, and coarse fraction data from the Gulf of Alaska spanning the past 18,000 years 2017-07-17 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/22400 Investigator S.K. Praetorius Investigator A.C. Mix Investigator B. Jensen Investigator D. Froese Investigator G.A. Milne Investigator M.D. Wolhowe Investigator J.A. Addison Investigator F.G. Prahl earth science paleoclimate climate reconstructions|paleoceanography depth at sample end,null,null,centimeter,null,climate reconstructions|paleoceanography,null,null,N,null earth science paleoclimate climate reconstructions|paleoceanography depth at sample start,null,null,centimeter,null,climate reconstructions|paleoceanography,null,null,N,null earth science paleoclimate climate reconstructions|paleoceanography age,null,null,calendar year before present,null,climate reconstructions|paleoceanography,null,null,N,Tuned age reference: Praetorius & Mix 2014 earth science paleoclimate paleoceanography weight,dry sediment,null,gram,null,paleoceanography,null,gas chromatography,N,null earth science paleoclimate paleoceanography weight,null,null,gram,null,paleoceanography,null,null,N,weight of the coarse fraction >125 mm earth science paleoclimate paleoceanography alkenone unsaturation index Uk37 prime,null,null,dimensionless,null,paleoceanography,null,gas chromatography,N,null earth science paleoclimate sample identification,null,null,null,null,,null,null,C,core name earth science paleoclimate depth at sample end,null,null,centimeter,null,,null,null,N,null earth science paleoclimate age,null,null,calendar year before present,null,,null,null,N,tuned age model allowing for variable marine reservoir ages tie points to NGRIP d18O isotope stratigraphy earth science paleoclimate climate reconstructions|paleoceanography sea surface temperature,alkenone unsaturation index,one standard deviation,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,Calibration: Prahl et al. 1988 earth science paleoclimate age,null,null,calendar kiloyear before present,null,,null,null,N,tuned age model allowing for variable marine reservoir ages tie points to NGRIP d18O isotope stratigraphy earth science paleoclimate paleoceanography ice rafted debris,null,null,count,null,paleoceanography,null,null,N,lithic grains >600 microns (excluding tephra) earth science paleoclimate paleoceanography alkenone unsaturation index Uk37 prime,null,one standard deviation,dimensionless,null,paleoceanography,null,null,N,null earth science paleoclimate paleoceanography delta 18O,Neogloboquadrina pachyderma sinistral,null,per mil VPDB,null,paleoceanography,composited,null,N,composite record of 66JC and 26JC/TC earth science paleoclimate sample identification,null,null,null,null,,null,null,C,core name; TC: Trigger core JC: Jumbo piston core earth science paleoclimate age,null,null,calendar year before present,null,,null,null,N,Tuned age reference: Praetorius & Mix 2014 earth science paleoclimate depth,null,null,meter,null,,null,null,N,null earth science paleoclimate age,null,null,calendar year before present,null,,null,null,N,constant marine reservoir ages applied to each core; calibrated radiocarbon ages using Marine13 earth science paleoclimate climate reconstructions|paleoceanography delta 18O,alkenone unsaturation index|delta 18O|sea water,null,per mil PDB,null,climate reconstructions|paleoceanography,corrected,null,N,d18O sealevel correction based on Waelbroeck et al. 2002 earth science paleoclimate climate reconstructions|paleoceanography delta 18O,alkenone unsaturation index|delta 18O|sea water,null,per mil PDB,null,climate reconstructions|paleoceanography,null,null,N,Uses Nps offset by 0.4; Calibration: Bemis et al. 1998 earth science paleoclimate climate reconstructions|paleoceanography age,null,null,calendar kiloyear before present,null,climate reconstructions|paleoceanography,null,null,N,Age model: Praetorius & Mix 2014 earth science paleoclimate climate reconstructions|paleoceanography depth,null,null,meter,null,climate reconstructions|paleoceanography,null,null,N,null earth science paleoclimate climate reconstructions|paleoceanography depth,null,null,centimeter,null,climate reconstructions|paleoceanography,null,null,N,null earth science paleoclimate age,null,null,calendar kiloyear before present,null,,null,null,N,constant marine reservoir ages applied to each core; calibrated radiocarbon ages using Marine13 earth science paleoclimate paleoceanography volcanic material,null,null,count,null,paleoceanography,null,null,N,tephra grains >600 mm earth science paleoclimate paleoceanography C37 alkenone,null,null,milligram per gram,null,paleoceanography,null,null,N,concentration of C37 ketone abundance earth science paleoclimate climate reconstructions|paleoceanography sample identification,null,null,null,null,climate reconstructions|paleoceanography,null,null,C,core name earth science paleoclimate depth at sample start,null,null,centimeter,null,,null,null,N,null earth science paleoclimate climate reconstructions|paleoceanography depth,null,null,meter,null,climate reconstructions|paleoceanography,null,null,N,depth in core for Neogloboquadrina pachyderma sinistral (Nps) samples earth science paleoclimate climate reconstructions|paleoceanography delta 18O,alkenone unsaturation index|delta 18O|sea water,null,per mil PDB,null,climate reconstructions|paleoceanography,null,null,N,Calibration: Bemis et al. 1998 earth science paleoclimate climate reconstructions|paleoceanography delta 18O,alkenone unsaturation index|delta 18O|sea water,null,per mil PDB,null,climate reconstructions|paleoceanography,corrected,null,N,d18O sealevel correction based on Waelbroeck et al.2002 earth science paleoclimate paleoceanography grain size class,null,null,weight percent,null,paleoceanography,null,null,N,coarse fraction >125 mm earth science paleoclimate paleoceanography delta 18O,Neogloboquadrina pachyderma sinistral,null,per mil VPDB,null,paleoceanography,null,isotope ratio mass spectrometry,N,null earth science paleoclimate climate reconstructions|paleoceanography sample identification,null,null,null,null,climate reconstructions|paleoceanography,null,null,C,core name; TC: Trigger core JC: Jumbo piston core earth science paleoclimate climate reconstructions|paleoceanography delta 18O,alkenone unsaturation index|delta 18O|sea water,one standard deviation,per mil PDB,null,climate reconstructions|paleoceanography,null,null,N,Calibration: Bemis et al. 1998 earth science paleoclimate climate reconstructions|paleoceanography sea surface temperature,alkenone unsaturation index,null,degree Celsius,null,climate reconstructions|paleoceanography,composited,null,N,SST using all cores; 1°C added to core EW0408-66JC for the composite record earth science paleoclimate depth,null,null,centimeter,null,,null,null,N,null earth science paleoclimate climate reconstructions|paleoceanography sea surface temperature,alkenone unsaturation index,null,degree Celsius,null,climate reconstructions|paleoceanography,null,null,N,Calibration: Prahl et al. 1988 earth science paleoclimate climate reconstructions|paleoceanography age,null,null,calendar kiloyear before present,null,climate reconstructions|paleoceanography,null,null,N,age for midpoint depth of alkenone and Nps sample pairs earth science paleoclimate paleoceanography delta 18O,Neogloboquadrina pachyderma sinistral,null,per mil VPDB,null,paleoceanography,corrected,null,N,0.4 per mil offset applied to core 66JC earth science paleoclimate paleoceanography delta 18O,Neogloboquadrina pachyderma sinistral,null,per mil VPDB,null,paleoceanography,corrected,isotope ratio mass spectrometry,N,0.4 per mil offset applied to core 66JC earth science paleoclimate paleocean oxygen isotopes earth science paleoclimate paleocean biomarkers earth science paleoclimate paleocean physical properties earth science paleoclimate paleocean reconstruction earth science paleoclimate paleocean age control geoscientificInformation Sea Surface Temperature Reconstruction 18170 cal yr BP 400 cal yr BP Complete 56.96 57.872382 -137.10446 -136.43 -1623 -426 Ocean Pacific Ocean North Pacific Ocean Gulf Of Alaska EW0408-26TC/JC and 66JC>LATITUDE >LONGITUDE 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, A.C. Mix, B. Jensen, D. Froese, G. Milne, M.D. Wolhowe, J.A. Addison, and F.G. Prahl 2016 Earth and Planetary Science Letters 452 79-89 10.1016/j.epsl.2016.07.033 http://www.sciencedirect.com/science/article/pii/S0012821X16303892

Observations of enhanced volcanic frequency during the last deglaciation have led to the hypothesis that ice unloading in glaciated volcanic terrains can promote volcanism through decompression melting in the shallow mantle or a reduction in crustal magma storage time. However, a direct link between regional climate change, isostatic adjustment, and the initiation of volcanism remains to be demonstrated due to the difficulty of obtaining high-resolution well-dated records that capture short-term climate and volcanic variability traced to a particular source region. Here we present an exceptionally resolved record of 19 tephra layers paired with foraminiferal oxygen isotopes and alkenone paleotemperatures from marine sediment cores along the Southeast Alaska margin spanning the last deglacial transition. Major element compositions of the tephras indicate a predominant source from the nearby Mt. Edgecumbe Volcanic Field (MEVF). We constrain the timing of this regional eruptive sequence to 14.6–13.1 ka. The sudden increase in volcanic activity from the MEVF coincides with the onset of Bølling–Allerød interstadial warmth, the disappearance of ice-rafted detritus, and rapid vertical land motion associated with modeled regional isostatic rebound in response to glacier retreat. These data support the hypothesis that regional deglaciation can rapidly trigger volcanic activity. Rapid sea surface temperature fluctuations and an increase in local salinity (i.e., d18Osw) variability are associated with the interval of intense volcanic activity, consistent with a two-way interaction between climate and volcanism in which rapid volcanic response to ice unloading may in turn enhance short-term melting of the glaciers, plausibly via albedo effects on glacier ablation zones. STUDY NOTES: Source reference for EW0408-66JC and EW0408-26JC age models and planktonic oxygen isotopes: Praetorius, S.K. & Mix, A.C. Synchronization of North Pacific and Greenland climates preceded abrupt deglacial warming. Science 345, 444 (2014). Please cite original reference when using this data. Not all alkenone and isotope samples were taken from precisely the same depth intervals. Some isotope samples were measured on 2cm interval samples, whereas alkenone measurements were conducted on 1cm samples. Therefore, some of the d18O sw calculations are based on alkenone temperature and d18O pairs that have minor offsets in the midpoint depth range. Nearly all of these pairs are within a decade of one another in the age model. Provided Keywords: volcanism, deglacial, isostatic rebound, abrupt climate change

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-26-coarse.txt NOAA Template File; 26TC/JC Coarse Fraction Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-66-d18o.txt NOAA Template File; 66JC d18O Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-26-d18osw.txt NOAA Template File; 26TC/JC d18Osw Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-alkenone.txt NOAA Template File; Composite Alkenone Paleotemperature Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-66-coarse.txt NOAA Template File; 66JC Coarse Fraction Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-66-d18osw.txt NOAA Template File; 66JC d18Osw Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-composite-d18o.txt NOAA Template File; Composite d18O Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-26-d18o.txt NOAA Template File; 26TC/JC d18O Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11