# Alkenone paleotemperature estimates, d18O seawater data, and coarse fraction data from the Gulf of Alaska spanning the past 18,000 years. #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite original publication, online resource and date accessed when using this data. # If there is no publication information, please cite Investigator, title, online resource and date accessed. # # Description/Documentation lines begin with # # Data lines have no # # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/ # Description: NOAA Landing Page # Online_Resource: https://www1.ncdc.noaa.gov/pub/data/paleo/paleocean/by_contributor/praetorius2016/praetorius2016-26-d18o.txt # Description: NOAA location of the template # # Archive: Paleoceanography # # Parameter_Keywords: biomarkers, oxygen isotopes, age controls, physical properties, reconstructions #--------------------------------------- # Contribution_Date # Date: 2017-07-18 #--------------------------------------- # File_Last_Modified_Date # Date: 2017-07-18 #--------------------------------------- # Title # Study_Name: Alkenone paleotemperature estimates, d18O seawater data, and coarse fraction data from the Gulf of Alaska spanning the past 18,000 years. #--------------------------------------- # Investigators # Investigators: Praetorius, Summer; Mix, Alan; Jensen, Britta; Froese, Duane; Milne, Glenn; Wolhowe, Matthew; Addison, Jason; Prahl, Fredrick. #--------------------------------------- # Description_Notes_and_Keywords # Description: 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 #--------------------------------------- # Publication # Authors: Praetorius, S.K, A.C. Mix, B. Jensen, D. Froese, G. Milne, M.D. Wolhowe, J.A. Addison, and F.G. Prahl # Published_Date_or_Year: 2016 # Published_Title: Interaction between climate, volcanism, and isostatic rebound in Southeast Alaska during the last deglaciation # Journal_Name: Earth and Planetary Science Letters # Volume: 452 # Edition: # Issue: # Pages: 79-89 # Report Number: # DOI: 10.1016/j.epsl.2016.07.033 # Online_Resource: http://www.sciencedirect.com/science/article/pii/S0012821X16303892 # Full_Citation: # Abstract: 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. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: National Science Foundation # Grant: AGS-0602395, OCE-1204204 #--------------------------------------- # Site Information # Site_Name: EW0408-26TC/JC # Location: Gulf of Alaska # Country: # Northernmost_Latitude: 56.96 # Southernmost_Latitude: 56.96 # Easternmost_Longitude: -136.43 # Westernmost_Longitude: -136.43 # Elevation: -1623 #--------------------------------------- # Data_Collection # Collection_Name: EW0408-26TC/JC d18O Praetorius2016 # First_Year: 18170 # Last_Year: 13410 # Time_Unit: cal yr BP # Core_Length: 8.92 # Notes: #--------------------------------------- # Chronology_Information # Chronology: # All radiocarbon data published in Praetorius & Mix, Science 345, 444 (2014): please cite original reference when using this data # Core core name # Depth midpoint depth in core # 14C Age calibrated radiocarbon age mixed planktonic foraminifera # 14C uncertainty radiocarbon age uncertainty NaN one standard deviation yr # Marine reservoir correction total marine reservoir correction NaN NaN yr # Marine13 age 2 s lower lower range of calibrated radiocarbon age NaN two standard deviation cal yr BP Calibrated using Marine13 (Reimer et al., 2013) # Marine13 age 2 s upper upper range of calibrated radiocarbon age NaN NaN cal yr BP Calibrated using Marine13 (Reimer et al., 2013) # Marine13 midpoint age midpoint age of calibrated radiocarbon age NaN NaN cal yr BP NaN # Tuned age controls tuned age controls allowing for variable marine reservoir age NaN NaN cal yr BP Tuned age based on tied d18O stratigraphy # Data NaN NaN NaN NaN NaN # All radiocarbon data published in Praetorius & Mix, Science 345, 444 (2014): please cite original reference when using this data NaN NaN NaN NaN NaN # Core Depth 14C Age 14C uncertainty Marine reservoir correction Marine13 age 2 s lower Marine13 age 2 s upper Marine13 midpoint age Tuned age controls # # EW0408-66JC 10.5 4585 20 595 + 50 4440 4725 4560 4560 # EW0408-66JC 53 8100 20 595 + 50 8245 8501 8370 8370 # EW0408-66JC 65 8695 25 595 + 50 8985 9279 9130 9130 # EW0408-66JC 85 10610 30 595 + 50 11254 11800 11530 11610 # EW0408-66JC 110 10730 40 595 + 50 11390 12023 11710 11710 # EW0408-66JC 151 10755 25 595 + 50 11450 12048 11750 NaN # EW0408-66JC 205 10900* 30 NaN NaN NaN NaN NaN # EW0408-66JC 215 10895 40 595 + 50 11841 12423 12130 NaN # EW0408-66JC 305 10930 30 595 + 50 11934 12452 12190 NaN # EW0408-66JC 355 10940 45 595 + 50 11926 12479 12200 12200 # EW0408-66JC 405 11085 35 595 + 50 12148 12597 12370 NaN # EW0408-66JC 455 11135 30 595 + 50 12251 12630 12440 NaN # EW0408-66JC 505 11115* 25 NaN NaN NaN NaN NaN # EW0408-66JC 565 11245 30 595 + 50 12481 12705 12590 NaN # EW0408-66JC 605 11335 35 595 + 50 12550 12764 12660 NaN # EW0408-66JC 705 11475 45 595 + 50 12623 12907 12770 12570 # EW0408-66JC 759 11615 30 595 + 50 12718 13060 12890 12700 # EW0408-66JC 805 11715 30 595 + 50 12809 13154 12980 12830 # EW0408-66JC 860 MEd 11250 50 595 + 50 13032 13222 13130 13130 # EW0408-66JC 904.5 11935 50 595 + 50 13076 13375 13230 13230 # EW0408-66JC 1162 12165* 30 NaN NaN NaN NaN NaN # EW0408-66JC 1273 12155 35 595 + 50 13273 13548 13410 13410 # EW0408-66JC 1370.5 12295 35 595 + 50 13389 13725 13560 13560 # EW0408-66JC 1374.5 12100* 70 NaN NaN NaN NaN NaN # # EW0408-26TC 0 NaN NaN NaN NaN NaN NaN 0 # EW0408-26TC 14.5 NaN NaN NaN NaN NaN NaN 11600 # EW0408-26TC 17.5 10330 40 735 + 50 10813 11133 10970 NaN # EW0408-26TC 31.5 NaN NaN NaN NaN NaN NaN 12700 # EW0408-26TC 47.5 12205 40 735 + 50 13236 13446 13340 13340 # # EW0408-26JC 1 12295 30 735 + 50 13277 13542 13410 13550 # EW0408-26JC 22.5 NaN NaN NaN NaN NaN NaN 13700 # EW0408-26JC 45.5 12855 40 735 + 50 13829 14162 14000 14000 # EW0408-26JC 88.5 13290* 35 NaN NaN NaN NaN NaN # EW0408-26JC 151 13195 30 735 + 50 14229 14991 14610 14610 # EW0408-26JC 180.5 13230 45 735 + 50 14270 15066 14670 14670 # EW0408-26JC 290.5 13840 40 735 + 50 15416 15969 15690 15690 # EW0408-26JC 480.5 15165 40 735 + 50 17369 17832 17600 17600 # EW0408-26JC 500 15235 35 735 + 50 17476 17887 17680 17680 # EW0408-26JC 891 15705 35 735 + 50 17977 18369 18170 18170 # # *Radiocarbon ages that are not included in the age model due to minor age reversals NaN NaN NaN NaN NaN NaN NaN NaN # # MEd: Mt. Edgecumbe dacite NaN NaN NaN NaN NaN NaN NaN NaN # #--------------------------------------- # Variables # Data variables follow that are preceded by "##" in columns one and two. # Variables list, one per line, shortname-tab- 10 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data,additional info ## core Core name,,,,,paleoceanography,,,C, ## depth_m depth,,,m,,,,,N, ## age_marine13 age,planktonic foraminifera,,calendar ka BP,,,constant marine reservoir ages applied to each core,calibrated radiocarbon ages using Marine13,N, ## age_tuned age,,,calendar ka BP,,,tuned age model allowing for variable marine reservoir ages,tie points to NGRIP d18O isotope stratigraphy,N, ## delta18O_Nps delta 18O,Neogloboquadrina pachyderma sinistral,,per mil VPDB,Summer,paleoceanography,,analytical technique: isotope ratio mass spectrometry,N, #------------------------ # Data # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Value: NAN core depth_m age_marine13 age_tuned delta18O_Nps EW0408-26JC 0.010 13.410 13.550 2.470 EW0408-26JC 0.025 13.430 13.560 2.430 EW0408-26JC 0.035 13.443 13.567 2.730 EW0408-26JC 0.045 13.456 13.574 2.780 EW0408-26JC 0.055 13.470 13.581 2.620 EW0408-26JC 0.065 13.483 13.588 2.710 EW0408-26JC 0.085 13.509 13.602 2.630 EW0408-26JC 0.105 13.536 13.616 2.410 EW0408-26JC 0.125 13.562 13.630 2.680 EW0408-26JC 0.145 13.589 13.644 2.650 EW0408-26JC 0.165 13.616 13.658 2.360 EW0408-26JC 0.185 13.642 13.672 2.320 EW0408-26JC 0.205 13.669 13.686 2.260 EW0408-26JC 0.225 13.695 13.700 2.710 EW0408-26JC 0.245 13.722 13.726 2.530 EW0408-26JC 0.265 13.748 13.752 2.280 EW0408-26JC 0.290 13.781 13.785 2.180 EW0408-26JC 0.305 13.801 13.804 2.330 EW0408-26JC 0.325 13.828 13.830 2.560 EW0408-26JC 0.355 13.867 13.870 2.230 EW0408-26JC 0.365 13.881 13.883 2.120 EW0408-26JC 0.385 13.907 13.909 2.360 EW0408-26JC 0.405 13.934 13.935 2.360 EW0408-26JC 0.425 13.960 13.961 2.670 EW0408-26JC 0.455 14.000 14.000 2.410 EW0408-26JC 0.465 14.006 14.006 2.340 EW0408-26JC 0.485 14.017 14.017 2.600 EW0408-26JC 0.510 14.032 14.032 2.110 EW0408-26JC 0.525 14.040 14.040 2.350 EW0408-26JC 0.555 14.058 14.058 2.320 EW0408-26JC 0.565 14.064 14.064 2.190 EW0408-26JC 0.585 14.075 14.075 1.910 EW0408-26JC 0.605 14.087 14.087 2.260 EW0408-26JC 0.625 14.098 14.098 2.450 EW0408-26JC 0.655 14.116 14.116 1.800 EW0408-26JC 0.655 14.116 14.116 1.850 EW0408-26JC 0.675 14.127 14.127 2.070 EW0408-26JC 0.705 14.145 14.145 2.220 EW0408-26JC 0.725 14.156 14.156 2.180 EW0408-26JC 0.755 14.173 14.173 2.950 EW0408-26JC 0.765 14.179 14.179 2.010 EW0408-26JC 0.785 14.191 14.191 2.330 EW0408-26JC 0.805 14.202 14.202 2.360 EW0408-26JC 0.815 14.208 14.208 2.730 EW0408-26JC 0.825 14.214 14.214 3.040 EW0408-26JC 0.895 14.254 14.254 2.040 EW0408-26JC 0.905 14.260 14.260 1.880 EW0408-26JC 0.925 14.272 14.272 2.390 EW0408-26JC 0.955 14.289 14.289 1.790 EW0408-26JC 0.965 14.295 14.295 1.870 EW0408-26JC 0.985 14.306 14.306 2.300 EW0408-26JC 1.010 14.321 14.321 2.220 EW0408-26JC 1.025 14.330 14.330 2.060 EW0408-26JC 1.055 14.347 14.347 2.410 EW0408-26JC 1.065 14.353 14.353 1.770 EW0408-26JC 1.085 14.364 14.364 2.010 EW0408-26JC 1.105 14.376 14.376 2.100 EW0408-26JC 1.125 14.387 14.387 1.870 EW0408-26JC 1.155 14.405 14.405 1.450 EW0408-26JC 1.165 14.411 14.411 1.760 EW0408-26JC 1.185 14.422 14.422 1.650 EW0408-26JC 1.205 14.434 14.434 2.190 EW0408-26JC 1.225 14.445 14.445 1.650 EW0408-26JC 1.255 14.463 14.463 1.740 EW0408-26JC 1.265 14.468 14.468 2.000 EW0408-26JC 1.285 14.480 14.480 1.950 EW0408-26JC 1.305 14.491 14.491 2.350 EW0408-26JC 1.325 14.503 14.503 1.910 EW0408-26JC 1.355 14.520 14.520 1.850 EW0408-26JC 1.375 14.532 14.532 1.850 EW0408-26JC 1.405 14.549 14.549 1.920 EW0408-26JC 1.425 14.561 14.561 1.900 EW0408-26JC 1.455 14.578 14.578 1.940 EW0408-26JC 1.475 14.590 14.590 1.890 EW0408-26JC 1.510 14.610 14.610 2.000 EW0408-26JC 1.535 14.615 14.615 1.690 EW0408-26JC 1.555 14.619 14.619 1.560 EW0408-26JC 1.575 14.623 14.623 1.940 EW0408-26JC 1.595 14.627 14.627 2.030 EW0408-26JC 1.605 14.629 14.629 1.840 EW0408-26JC 1.615 14.631 14.631 1.670 EW0408-26JC 1.625 14.633 14.633 1.860 EW0408-26JC 1.655 14.639 14.639 1.890 EW0408-26JC 1.675 14.644 14.644 2.010 EW0408-26JC 1.695 14.648 14.648 2.490 EW0408-26JC 1.705 14.650 14.650 2.320 EW0408-26JC 1.725 14.654 14.654 2.260 EW0408-26JC 1.745 14.658 14.658 2.760 EW0408-26JC 1.775 14.664 14.664 2.430 EW0408-26JC 1.805 14.670 14.670 3.010 EW0408-26JC 1.825 14.689 14.689 2.830 EW0408-26JC 1.855 14.716 14.716 2.760 EW0408-26JC 1.905 14.763 14.763 3.040 EW0408-26JC 1.955 14.809 14.809 2.780 EW0408-26JC 2.010 14.860 14.860 2.770 EW0408-26JC 2.055 14.902 14.902 3.140 EW0408-26JC 2.105 14.948 14.948 3.020 EW0408-26JC 2.155 14.995 14.995 3.010 EW0408-26JC 2.205 15.041 15.041 3.210 EW0408-26JC 2.255 15.087 15.087 3.020 EW0408-26JC 2.305 15.134 15.134 2.770 EW0408-26JC 2.355 15.180 15.180 3.150 EW0408-26JC 2.405 15.226 15.226 3.090 EW0408-26JC 2.455 15.273 15.273 2.970 EW0408-26JC 2.510 15.324 15.324 2.950 EW0408-26JC 2.555 15.365 15.365 2.770 EW0408-26JC 2.605 15.412 15.412 3.070 EW0408-26JC 2.655 15.458 15.458 3.080 EW0408-26JC 2.705 15.505 15.505 2.910 EW0408-26JC 2.755 15.551 15.551 3.400 EW0408-26JC 2.805 15.597 15.597 3.190 EW0408-26JC 2.855 15.644 15.644 3.210 EW0408-26JC 2.905 15.690 15.690 3.180 EW0408-26JC 2.955 15.740 15.740 2.780 EW0408-26JC 3.010 15.796 15.796 3.110 EW0408-26JC 3.055 15.841 15.841 3.150 EW0408-26JC 3.105 15.891 15.891 3.280 EW0408-26JC 3.155 15.941 15.941 3.070 EW0408-26JC 3.205 15.992 15.992 3.350 EW0408-26JC 3.255 16.042 16.042 3.190 EW0408-26JC 3.305 16.092 16.092 3.590 EW0408-26JC 3.355 16.142 16.142 3.700 EW0408-26JC 3.405 16.193 16.193 3.470 EW0408-26JC 3.460 16.248 16.248 3.540 EW0408-26JC 3.510 16.298 16.298 3.470 EW0408-26JC 3.560 16.348 16.348 3.240 EW0408-26JC 3.605 16.394 16.394 3.510 EW0408-26JC 3.660 16.449 16.449 3.560 EW0408-26JC 3.705 16.494 16.494 3.560 EW0408-26JC 3.755 16.544 16.544 3.520 EW0408-26JC 3.805 16.595 16.595 3.680 EW0408-26JC 3.855 16.645 16.645 3.740 EW0408-26JC 3.925 16.715 16.715 3.590 EW0408-26JC 3.990 16.781 16.781 3.570 EW0408-26JC 4.055 16.846 16.846 3.690 EW0408-26JC 4.110 16.901 16.901 3.260 EW0408-26JC 4.155 16.947 16.947 3.450 EW0408-26JC 4.210 17.002 17.002 3.410 EW0408-26JC 4.255 17.047 17.047 3.350 EW0408-26JC 4.310 17.102 17.102 3.580 EW0408-26JC 4.355 17.148 17.148 3.770 EW0408-26JC 4.405 17.198 17.198 3.560 EW0408-26JC 4.455 17.248 17.248 3.510 EW0408-26JC 4.510 17.303 17.303 3.430 EW0408-26JC 4.555 17.349 17.349 3.420 EW0408-26JC 4.610 17.404 17.404 3.550 EW0408-26JC 4.655 17.449 17.449 3.500 EW0408-26JC 4.755 17.550 17.550 3.450 EW0408-26JC 4.805 17.600 17.600 3.800 EW0408-26JC 4.855 17.621 17.621 3.620 EW0408-26JC 4.905 17.641 17.641 3.590 EW0408-26JC 4.955 17.662 17.662 3.550 EW0408-26JC 5.010 17.681 17.681 3.510 EW0408-26JC 5.055 17.687 17.687 3.420 EW0408-26JC 5.205 17.706 17.706 3.510 EW0408-26JC 5.255 17.712 17.712 3.550 EW0408-26JC 5.310 17.719 17.719 3.430 EW0408-26JC 5.355 17.724 17.724 3.610 EW0408-26JC 5.405 17.731 17.731 3.640 EW0408-26JC 5.450 17.736 17.736 3.290 EW0408-26JC 5.510 17.744 17.744 3.360 EW0408-26JC 5.550 17.749 17.749 3.480 EW0408-26JC 5.605 17.756 17.756 3.630 EW0408-26JC 5.650 17.761 17.761 3.540 EW0408-26JC 5.710 17.769 17.769 3.410 EW0408-26JC 5.755 17.775 17.775 3.450 EW0408-26JC 5.805 17.781 17.781 3.630 EW0408-26JC 5.850 17.787 17.787 3.630 EW0408-26JC 5.990 17.804 17.804 3.600 EW0408-26JC 6.050 17.812 17.812 3.480 EW0408-26JC 6.110 17.819 17.819 3.260 EW0408-26JC 6.150 17.824 17.824 3.370 EW0408-26JC 6.205 17.831 17.831 3.660 EW0408-26JC 6.255 17.837 17.837 3.660 EW0408-26JC 6.310 17.844 17.844 3.580 EW0408-26JC 7.350 17.975 17.975 3.450 EW0408-26JC 7.405 17.981 17.981 3.410 EW0408-26JC 7.465 17.989 17.989 3.550 EW0408-26JC 7.550 18.000 18.000 3.580 EW0408-26JC 7.605 18.006 18.006 3.550 EW0408-26JC 7.650 18.012 18.012 3.570 EW0408-26JC 7.705 18.019 18.019 3.430 EW0408-26JC 7.780 18.028 18.028 3.620 EW0408-26JC 7.965 18.052 18.052 3.650 EW0408-26JC 8.005 18.057 18.057 3.320 EW0408-26JC 8.110 18.070 18.070 3.720 EW0408-26JC 8.210 18.082 18.082 3.500 EW0408-26JC 8.310 18.095 18.095 3.590 EW0408-26JC 8.405 18.107 18.107 3.550 EW0408-26JC 8.510 18.120 18.120 3.610 EW0408-26JC 8.610 18.132 18.132 3.650 EW0408-26JC 8.710 18.145 18.145 3.410 EW0408-26JC 8.810 18.157 18.157 3.560 EW0408-26JC 8.910 18.170 18.170 3.450