Chilean Margin 33KYr Alkenone SST Reconstructions ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!! NAME OF DATA SET: Chilean Margin 33KYr Alkenone SST Reconstructions LAST UPDATE: 6/2011 (Original receipt by WDC Paleo) CONTRIBUTORS: Kim, J.-H., R.R. Schneider, D. Hebbeln, P.J. Müller, and G. Wefer. IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2011-085 WDC PALEO CONTRIBUTION SERIES CITATION: Kim, J.-H., et al. 2011. Chilean Margin 33KYr Alkenone SST Reconstructions. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2011-085. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Kim, J.-H., R.R. Schneider, D. Hebbeln, P.J. Müller, and G. Wefer. 2002. Last deglacial sea-surface temperature evolution in the Southeast Pacific compared to climate changes on the South American continent. Quaternary Science Reviews, Vol. 21, pp. 2085-2097. ABSTRACT: Applying the alkenone method, we estimated sea-surface temperatures (SSTs) for the past 33 kyr in two marine sediment cores recovered from the continental slope off mid-latitude Chile. The SST record shows an increase of 6.7°C from the last ice age (LIA) to the Holocene climatic optimum, while the temperature contrast between LIA and modern temperatures is only about 3.4°C. The timing and magnitude of the last deglacial warming in the ocean correspond to those observed in South American continental records. According to our SST record, the existence of a Younger Dryas equivalent cooling in the Southeast Pacific is much more uncertain than for the continental climate changes. A warming step of about 2.5°C observed between 8 and 7.5 cal kyr BP may have been linked to the early to mid-Holocene climatic transition (8.2–7.8 cal kyr BP), also described from equatorial Africa and Antarctica. In principal, variations in the latitudinal position of the Southern Pacific Westerlies are considered to be responsible for SST changes in the Peru-Chile current off mid-latitude Chile. ADDITIONAL REFERENCES: Kim, J.-H. 2001. Reconstruction of past sea-surface temperatures in the eastern south Atlantic and the eastern south Pacific across termination I based on the alkenone method. Berichte, Fachbereich Geowissenschaften, Universität Bremen, 180, 114 pp. Müller, P.J., G. Kirst, G. Ruhland, I. von Storch, and A. Rosell-Mele. 1998. Calibration of the alkenone palaeotemperature index UK'37 based on core-tops from the eastern South Atlantic and the global ocean (601N-601S). Geochimica et Cosmochimica Acta 62, 1757–1772. GEOGRAPHIC REGION: Eastern South Pacific PERIOD OF RECORD: 33 KYrBP - present FUNDING SOURCES: Graduiertenkolleg Programat at the Fachbereich Geowissenschaften and Sonderforschungsbereich 261 (SFB 261), University of Bremen, sponsored by the Deutsche Forschungsgemeinschaft (DFG), German Bundesministerium fur Bildung und Forschung (BMBF) CHIPAL. DESCRIPTION: Alkenone sea-surface temperature (SST) estimates for the past 33 kyr from two sediment cores collected from the continental slope off mid-latitude Chile. Core GIK 17748-2, Valparaiso Basin: 32°45'S, 72°02'W, 2545 m water depth Core GeoB 3302-1: 33°13'S; 72°06'W, 1498 m water depth DATA: 1. AMS 14C dates and age control points of cores GIK17748-2 and GeoB 3302-1 LabCode Depth-cm 14CageYrs Error Age(cal yr BP) Core GIK17748-2: GrA 1095 69 3760 40 4230 GrA 1096 101 6890 40 7740 GrA 3805 128 9250 80 10310 GrA 1097 156 10520 50 12520 GrA 1098 185 11200 50 13060 GrA 1099 341 12890 60 15430 Core GeoB 3302-1: 3 9790* KIA 4050 18 11030 160 12970 KIA 6180 33 13360 90 15940 KIA 4049 48 14950 120 17770 KIA 4044 68 15200 130 18060 KIA 4043 103 16660 150 19740 KIA 4042 133 17450 170 20640 KIA 4041 178 18590 180 21960 KIA 4040 233 19700 210 23230 KIA 6173 308 22730 240 26750 KIA 7254 405 27960 340 32700 The 14C ages were corrected for a reservoir effect of 400 yr (Bard, 1988) and calibrated using the Calib 4.0 software of Stuiver and Reimer (1993); for sediments older than 24 000 cal yr the method of Bard (1998) has been used. GrA, Center for Isotope Research, University of Groningen, The Netherlands; KIA, Leibniz Laboratory, University of Kiel, Germany. * Correlation of d18O record to core 17748-2. 2. Kim et al. 2002, Kim 2001 GIK17748-2 Alkenone SST Data Column 1: DEPTH, sediment [m] Column 2: Age, dated [ka] Column 3: Sedimentation rate [cm/ka] Column 4: Alkenone, unsaturation index UK`37 Column 5: Sea surface temperature, annual mean [°C] calculated from (Müller et al, 1998) Depth[m] AgeKa SedRate UK`37 SST°C 0.03 1.08 16.1 0.57 16.1 0.08 1.32 16.1 0.56 15.5 0.18 1.8 16.1 0.62 17.3 0.23 2.04 16.1 0.6 16.9 0.28 2.27 16.1 0.61 17.1 0.33 2.51 16.1 0.6 16.8 0.38 2.75 16.1 0.61 17.2 0.43 2.99 16.1 0.63 17.8 0.58 3.7 16.1 0.63 17.7 0.63 3.94 16.1 0.63 17.9 0.68 4.18 16.1 0.64 18 0.73 4.67 9.1 0.64 18.2 0.78 5.21 9.1 0.66 18.6 0.83 5.76 9.1 0.65 18.5 0.88 6.31 9.1 0.67 18.9 0.93 6.86 9.1 0.66 18.7 0.98 7.41 9.1 0.66 18.8 0.98 7.41 9.1 0.66 18.8 1.03 7.93 10.5 0.59 16.5 1.08 8.41 10.5 0.6 16.7 1.13 8.88 10.5 0.6 16.9 1.18 9.36 10.5 0.6 16.9 1.23 9.83 10.5 0.61 17 1.28 10.31 10.5 0.58 16.2 1.33 10.7 12.7 0.55 15.5 1.38 11.1 12.7 0.54 14.9 1.43 11.49 12.7 0.59 16.6 1.48 11.89 12.7 0.61 17.2 1.53 12.28 12.7 0.62 17.4 1.58 12.55 22.2 0.62 17.5 1.78 12.93 22.2 0.66 18.7 1.83 13.03 22.2 0.66 18.7 1.88 13.11 65.8 0.67 18.9 1.93 13.19 65.8 0.67 19.1 1.98 13.26 65.8 0.67 18.8 2.03 13.34 65.8 0.56 15.6 2.13 13.49 65.8 0.56 15.7 2.23 13.64 65.8 0.57 15.9 2.33 13.79 65.8 0.6 16.8 2.43 13.94 65.8 0.59 16.5 2.53 14.1 65.8 0.58 16.4 2.63 14.25 65.8 0.6 16.7 2.73 14.4 65.8 0.59 16.6 2.83 14.55 65.8 0.59 16.5 2.93 14.7 65.8 0.59 16.6 3.03 14.85 65.8 0.56 15.5 3.13 15.01 65.8 0.53 14.6 3.23 15.16 65.8 0.55 15.4 3.33 15.31 65.8 0.54 15.1 3.43 15.46 65.8 0.53 14.7 3.53 15.61 65.8 0.53 14.6 3.63 15.76 65.8 0.51 14.2 3.73 15.92 65.8 0.52 14.5 3.83 16.07 65.8 0.52 14.5 3. Kim et al. 2002 GeoB 3302-1 Alkenone SST Data Column 1: DEPTH, sediment [m] Column 2: Age, dated [ka] Column 3: Sedimentation rate [cm/ka] Column 4: Alkenone, unsaturation index UK`37 Column 5: Sea surface temperature, annual mean [°C] calculated from (Müller et al, 1998) Depth Age SedRate UK`37 SST°C 0.18 12.97 5.06 0.59 16.5 0.23 13.96 5.06 0.55 15.3 0.28 14.95 5.06 0.51 14.1 0.33 15.94 5.06 0.52 14.4 0.38 16.55 8.19 0.55 15.2 0.43 17.16 8.19 0.5 13.8 0.48 17.77 8.19 0.5 13.7 0.53 17.78 26.92 0.47 12.8 0.58 17.96 26.92 0.47 12.8 0.63 18.15 26.92 0.45 12.2 0.68 18.33 26.92 0.45 12.2 0.73 18.52 26.92 0.43 11.8 0.78 18.71 26.92 0.47 12.8 0.83 18.89 26.92 0.47 12.8 0.88 19.08 26.92 0.46 12.5 0.93 19.26 26.92 0.46 12.5 0.98 19.45 26.92 0.45 12.3 1.03 19.73 26.92 0.45 12.2 1.08 19.89 33 0.46 12.5 1.13 20.04 33 0.47 13 1.18 20.19 33 0.49 13.5 1.23 20.34 33 0.48 13.1 1.28 20.49 33 0.46 12.5 1.33 20.64 33 0.46 12.5 1.38 20.79 34.3 0.46 12.7 1.43 20.94 34.3 0.46 12.7 1.48 21.08 34.3 0.45 12.4 1.53 21.23 34.3 0.45 12.2 1.58 21.37 34.3 0.45 12.3 1.63 21.52 34.3 0.44 11.9 1.68 21.66 34.3 0.44 12 1.73 21.81 34.3 0.46 12.5 1.78 21.96 34.3 0.44 12.1 1.83 22.07 43.04 0.44 11.9 1.88 22.19 43.04 0.43 11.6 1.93 22.3 43.04 0.43 11.6 1.98 22.42 43.04 0.42 11.5 2.03 22.54 43.04 0.44 12 2.08 22.65 43.04 0.44 12 2.13 22.77 43.04 0.42 11.5 2.18 22.89 43.04 0.43 11.8 2.23 23 43.04 0.49 13.5 2.28 23.12 43.04 0.48 13.1 2.33 23.23 43.04 0.46 12.6 2.38 23.47 21.32 0.46 12.5 2.43 23.7 21.32 0.45 12.3 2.48 23.94 21.32 0.45 12.4 2.53 24.17 21.32 0.47 12.9 2.58 24.41 21.32 0.46 12.5 2.63 24.64 21.32 0.48 13.2 2.68 24.88 21.32 0.48 13.3 2.73 25.11 21.32 0.49 13.5 2.78 25.34 21.32 0.49 13.5 2.83 25.58 21.32 0.49 13.4 2.88 25.81 21.32 0.46 12.7 2.93 26.05 21.32 0.46 12.6 2.98 26.28 21.32 0.45 12.2 3.03 26.52 21.32 0.44 12.1 3.08 26.75 21.32 0.45 12.2 3.13 27.06 16.31 0.46 12.6 3.18 27.36 16.31 0.45 12.3 3.23 27.67 16.31 0.47 12.8 3.28 27.98 16.31 0.44 11.9 3.33 28.28 16.31 0.45 12.4 3.38 28.59 16.31 0.46 12.6 3.43 28.9 16.31 0.48 13.3 3.48 29.2 16.31 0.49 13.5 3.53 29.51 16.31 0.49 13.5 3.58 29.82 16.31 0.5 13.8 3.63 30.12 16.31 0.51 14.1 3.68 30.43 16.31 0.51 14.1 3.73 30.74 16.31 0.52 14.3 3.78 31.04 16.31 0.5 13.7 3.83 31.35 16.31 0.5 13.7 3.88 31.66 16.31 0.5 13.9 3.93 31.96 16.31 0.5 13.9 3.98 32.27 16.31 0.49 13.6 4.03 32.57 16.31 0.46 12.7 4.08 32.68 16.31 0.5 13.7