Southeast Pacific High Resolution Alkenone SST Reconstruction ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE CONTRIBUTORS WHEN USING THIS DATA!!!!! NAME OF DATA SET: Southeast Pacific High Resolution Alkenone SST Reconstruction LAST UPDATE: 11/2005 (Original receipt by WDC Paleo) CONTRIBUTOR: Jérôme Kaiser, University of Bremen, IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2005-073 SUGGESTED DATA CITATION: Kaiser, J., et al. 2005. Southeast Pacific High Resolution Alkenone SST Reconstruction. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2005-073. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Kaiser, J., F. Lamy, and D. Hebbeln. 2005. A 70-kyr sea surface temperature record off southern Chile (Ocean Drilling Program Site 1233). Paleoceanography, Vol. 20, PA4009, doi:10.1029/2004PA001146 ABSTRACT: We present the first high-resolution alkenone-derived sea surface temperature (SST) reconstruction in the southeast Pacific (Ocean Drilling Program Site 1233) covering the major part of the last glacial period and the Holocene. The record shows a clear millennial-scale pattern that is very similar to climate fluctuations observed in Antarctic ice cores, suggesting that the Southern Hemisphere high-latitude climate changes extended into the midlatitudes, involving simultaneous changes in air temperatures over Antarctica, sea ice extent, extension of the Antarctic Circumpolar Current, and westerly atmospheric circulation. A comparison to other midlatitude surface ocean records suggests that this "Antarctic" millennial-scale pattern was probably a hemisphere-wide phenomenon. In addition, we performed SST gradient reconstructions over the complete latitudinal range of the Pacific Eastern Boundary Current System for different time intervals during the last 70 kyr. The main results suggest an equatorward displaced subtropical gyre circulation during marine isotope stages 2 and 4. GEOGRAPHIC REGION: Southeast Pacific PERIOD OF RECORD: 70 KYrBP - present FUNDING SOURCE: German Science Foundation grant DFG-He-3412-1-3 DESCRIPTION: 70 KYr Alkenone-based Southeast Pacific Sea Surface Temperature Reconstruction using the calibration curve from Prahl et al. (1988) (Uk'37 = 0.034T + 0.039) Alkenone data from ODP Site 1233: 41 deg. 0.005'S 74 deg. 26.992'W water depth 838m. DATA: Southeast Pacific Sea Surface Temperature Reconstruction Column 1: Depth (mcd) Column 2: Age (cal KYr BP 1950) Column 3: Alkenone-based SST (°C) Depth Age SST 0 -0.05 13.97 0.72 0.37 13.73 1.44 0.87 14.24 2.17 1.39 14.25 2.89 1.87 14.24 3.64 2.54 14.06 4.34 3.57 14.32 5.06 4.26 14.2 5.79 4.92 14.27 6.51 5.43 14.28 7.23 5.83 15 7.35 5.90 14.96 7.95 6.27 14.86 8.67 6.80 14.47 9.5 7.63 14.49 10.22 8.42 14.74 10.94 8.99 14.95 11.71 9.39 15.37 12.43 9.77 15.28 13.15 10.15 15.39 13.83 10.53 14.9 14.55 10.92 15.62 15.28 11.32 14.85 15.88 11.64 14.89 16 11.71 14.95 16.72 12.10 15.42 17.44 12.44 14.06 18.16 12.75 13.28 18.88 13.05 13.37 19.6 13.36 13.25 20.32 13.69 13.37 21.05 14.24 12.72 21.84 14.82 13.52 22.56 15.36 12.8 23.31 15.91 12.6 24.03 16.45 12.86 24.75 16.98 12.1 25.47 17.43 12.35 26.15 17.78 11.15 26.87 18.16 10.06 27.47 18.47 10.34 27.59 18.53 9.95 28.3 18.90 9.02 29.02 19.27 8.89 29.86 19.70 9.51 30.46 20.00 9.62 31.21 20.36 9.84 31.93 20.71 9.95 32.68 21.08 9.92 33.4 21.43 9.53 34 21.65 9.31 34.12 21.69 9.44 34.84 21.93 9.01 35.44 22.13 7.78 35.56 22.17 7.96 36.28 22.42 9.61 37.77 23.07 8.98 38.49 23.40 10.64 39.09 23.67 10.83 39.22 23.73 10.98 39.82 24.03 10.91 39.94 24.09 10.07 40.67 24.47 9.42 41.27 24.78 9.31 41.39 24.84 9.3 42.11 25.21 10.09 42.84 25.59 10.09 43.59 25.98 8.97 44.19 26.42 8.94 44.31 26.51 8.83 44.43 26.61 8.73 44.91 26.99 10.11 45.03 27.08 9.5 45.75 27.65 9.91 46.47 28.22 11.23 47.17 28.77 10.74 47.89 29.06 10.57 48.61 29.33 10.38 49.11 29.51 10.83 49.83 29.63 10.21 50.55 29.75 10.3 50.91 29.89 10.22 51.15 30.04 10.71 51.27 30.11 10.57 51.39 30.18 10.32 51.82 30.43 10.96 52 30.54 10.65 52.79 31.01 9.61 53.39 31.37 8.7 53.5 31.44 8.56 54.22 31.86 10.05 54.94 32.29 10.34 55.67 32.99 9.7 56.42 33.74 10.23 57.32 34.65 10.05 58.03 35.36 9.64 58.75 36.08 10.21 59.45 36.69 10.21 60.17 37.24 10.34 60.89 37.80 8.64 61.61 38.36 9.56 62.38 38.96 10.01 63.1 39.30 11.42 63.74 39.57 11.1 63.86 39.62 10.78 64.46 39.87 11.22 64.58 39.92 11.07 64.94 40.06 10.62 65.18 40.14 9.42 65.3 40.18 9.5 65.66 40.30 8.98 66.02 40.42 8.52 66.79 40.67 8.62 67.4 40.87 9.2 67.52 40.91 9.2 67.76 40.99 8.92 68.24 41.13 9.98 68.85 41.31 9.71 68.97 41.34 9.6 69.81 41.59 10.87 69.93 41.63 9.98 70.05 41.66 9.56 70.65 41.84 10.63 71.33 42.04 9.43 71.37 42.05 9.52 72.06 42.26 9.05 72.1 42.27 9.77 72.46 42.37 9.77 72.82 42.48 10.3 73.54 42.69 11.47 74.26 42.90 10.61 74.62 43.01 10.48 75.3 43.45 8.98 75.67 43.69 8.27 76.03 43.92 8.6 76.35 44.13 8.35 76.71 44.37 8.53 77.07 44.60 9.21 77.39 44.81 10.39 77.75 45.04 10.55 78.11 45.27 10.62 78.48 45.51 11.19 78.8 45.72 11.82 79.16 45.95 11.65 79.5 46.18 10.4 79.86 46.41 10.34 80.22 46.64 9.48 80.89 47.08 10.27 81.25 47.31 10.75 81.97 47.76 10.96 82.66 48.18 9.82 83.38 48.63 9.11 84.08 49.06 9.63 84.76 49.48 9.69 85.48 49.93 9.41 86.85 50.78 9.91 87.58 51.23 11.11 88.26 51.65 10.96 88.98 51.92 10.69 89.66 52.17 12.6 90.37 52.43 11.46 91.07 52.69 10.21 92.45 53.20 10.04 93.17 53.47 11.57 93.85 53.72 9.85 94.57 53.99 10.82 95.27 54.25 11.95 95.95 54.50 11.11 96.66 54.76 11.79 97.36 55.07 11.11 98.06 55.39 10.38 98.78 55.71 10.83 99.47 56.02 10.52 100.15 56.32 10.38 101.55 56.95 12.27 102.25 57.12 10.41 102.97 57.29 11.8 103.66 57.46 12.44 104.38 57.63 11.7 105.07 57.80 11.91 105.75 57.96 12.34 106.48 58.14 12.58 107.16 58.30 11.89 107.89 58.48 11.55 108.57 58.64 11.42 109.26 58.80 11.61 109.96 58.97 13.53 111.36 59.31 13.44 112.08 59.63 12.92 112.76 59.94 10.49 113.45 60.25 12.95 114.17 60.57 9.81 114.87 60.88 10.05 115.55 61.19 11.87 116.28 61.51 12.89 116.96 61.82 9.59 117.62 62.11 9.73 118.37 62.45 9.39 119.05 62.75 7.88 119.78 63.08 8.59 120.46 63.38 8.2 121.17 63.70 8.65 121.9 64.06 9.72 122.58 64.40 8.51 123.26 64.73 8.89 123.95 65.07 8.49 124.67 65.43 10.32 125.37 65.77 8.69 126.05 66.11 8.07 126.77 66.46 7.9 127.45 66.80 7.97 128.16 67.15 8.88 128.88 67.50 8.37 129.56 67.84 8.69 130.28 68.08 10.29 130.96 68.30 10.51 131.67 68.53 12.69 132.35 68.75 12.3 133.07 68.99 13.51 133.75 69.21 13.29 134.47 69.45 14.68 135.18 69.68 12.18 135.7 69.85 10.73