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. Praetorius, S.K. Mix, A.C. Jensen, B. Froese, D. Milne, G.A. Wolhowe, M.D. Addison, J.A. Prahl, F.G. Sea Surface Temperature Reconstruction 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 earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean earth science/paleoclimate/paleocean (EW0408-26TC/JC and 66JC>LATITUDE >LONGITUDE ) (EW0408-26TC/JC>LATITUDE 56.96>LONGITUDE -136.43) (EW0408-66JC>LATITUDE 57.872382>LONGITUDE -137.10446) 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 NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Praetorius, S.K. Investigator : Mix, A.C. Investigator : Jensen, B. Investigator : Froese, D. Investigator : Milne, G.A. Investigator : Wolhowe, M.D. Investigator : Addison, J.A. Investigator : Prahl, F.G. 2017-07-17 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/22400 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-26-coarse.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-66-d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-26-d18osw.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-alkenone.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-66-coarse.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-66-d18osw.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-composite-d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-26-d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-26-coarse.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-66-d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-26-d18osw.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-alkenone.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-66-coarse.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-66-d18osw.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-composite-d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-26-d18o.txt English https://www.ncdc.noaa.gov/paleo/study/22400 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-26-coarse.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-66-d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-26-d18osw.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-alkenone.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-66-coarse.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-66-d18osw.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-composite-d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/praetorius2016/praetorius2016-26-d18o.txt Praetorius, S.K, A.C. Mix, B. Jensen, D. Froese, G. Milne, M.D. Wolhowe, J.A. Addison, and F.G. Prahl2016Interaction between climate, volcanism, and isostatic rebound in Southeast Alaska during the last deglaciationEarth and Planetary Science Letters45279-8910.1016/j.epsl.2016.07.033http://www.sciencedirect.com/science/article/pii/S0012821X16303892 START YEAR: 18170 cal yr BP * END YEAR: 400 cal yr BP -137.10446 56.96 -136.43 57.872382