Northwestern Pacific 144KYr Alkenone Sea Surface Temperature Estimates ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE CONTRIBUTORS WHEN USING THIS DATA!!!!! NAME OF DATA SET: Northwestern Pacific 144KYr Alkenone Sea Surface Temperature Estimates LAST UPDATE: 10/2007 (Original receipt by WDC Paleo) CONTRIBUTOR: Masanobu Yamamoto, Hokkaido University IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2007-099 SUGGESTED DATA CITATION: Yamamoto, M., et al. 2007. Northwestern Pacific 144KYr Alkenone Sea Surface Temperature Estimates. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2007-099. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Yamamoto, M., R. Suemune, and T. Oba. 2005. Equatorward shift of the subarctic boundary in the northwestern Pacific during the last deglaciation. Geophys. Res. Lett., Vol. 32, L05609, doi:10.1029/2004GL021903 ABSTRACT: We have generated a high-resolution record of alkenone sea surface temperature (SST) between 10–24 ka from Core MD01-2421 off central Japan, in the northwestern Pacific. The cooling by 5°C from 21 ka to 12.8 ka implies the equatorward shift of the subarctic boundary in the northwestern Pacific by ~2.8° in latitude. This shift was a result of the stronger summer Okhotsk High. The Okhotsk High was likely enhanced by the combined effects of El Nino-like conditions in the tropical Pacific and the heating of the land surface of northeastern Siberia. ADDITIONAL REFERENCES: Prahl, F.G., L.A. Muehlhausen, and D.L. Zahnle. 1988. Further evaluation of long-chain alkenones as indicators of paleoceanographic conditions. Geochim. Cosmochim. Acta, 52, 2303-2310. Oba, T., T. Irino, M. Yamamoto, M. Murayama, A. Takamura, and K. Aoki. 2006. Paleoceanographic change off central Japan since the last 144,000 years based on high-resolution oxygen and carbon isotope records. Global and Planetary Change, 53: 5-20. Yamamoto, M., M. Yamamuro, and R. Tada. 2000. Late Quaternary records of organic carbon, calcium carbonate and biomarkers from Site 1016 off Point Conception, California margin. ODP Scientific Results, 167, 183-194. GEOGRAPHIC REGION: Northwestern Pacific PERIOD OF RECORD: 144 KYrBP - present FUNDING SOURCES: MEXT and Grants-in-Aid for Scientific Research of JSPS, Nos. 13304040 (T.O.) and 16340158 (M.Y.). DESCRIPTION: The analysis of alkenones and the calculation of temperature were conducted following the methods of Yamamoto et al. [2000] and Prahl et al. [1988], respectively, with an analytical accuracy of 0.24°C. Please see Oba et al. (2006) for age-depth model. Core MD01-2421: 36°02'N, 141° 47'E 2224m depth. DATA: Column 1: Depth (cm) Column 2: Age (ka) Column 3: UK37' Column 4: Temperature (deg C) Depth Age UK37' Temp. 1.19 0.24 0.671 18.60 5.94 0.29 0.629 17.36 74.55 0.96 0.661 18.29 225.45 2.61 0.684 18.97 375.74 4.51 0.687 19.06 453.33 5.53 0.696 19.32 523.94 6.48 0.701 19.47 603.23 7.53 0.736 20.49 674.53 9.09 0.697 19.35 719.89 10.10 0.696 19.33 729.99 10.32 0.717 19.93 747.97 10.72 0.714 19.85 750.50 10.78 0.715 19.88 753.03 10.83 0.679 18.82 755.56 10.89 0.661 18.29 758.09 10.95 0.675 18.72 760.61 11.00 0.655 18.12 763.14 11.06 0.621 17.10 765.69 11.12 0.611 16.84 768.26 11.17 0.639 17.64 770.84 11.23 0.649 17.95 773.41 11.29 0.587 16.13 775.96 11.34 0.604 16.61 778.49 11.40 0.608 16.72 781.01 11.46 0.577 15.81 783.54 11.51 0.570 15.61 786.05 11.57 0.578 15.86 788.55 11.62 0.539 14.69 791.05 11.68 0.563 15.41 793.55 11.73 0.564 15.44 796.05 11.79 0.582 15.98 798.55 11.84 0.513 13.95 801.05 11.90 0.555 15.17 806.04 12.01 0.553 15.13 813.46 12.33 0.491 13.29 815.98 12.44 0.501 13.59 821.08 12.66 0.529 14.42 823.63 12.78 0.481 12.99 828.65 13.00 0.530 14.43 833.65 13.23 0.519 14.12 838.73 13.47 0.556 15.20 841.28 13.59 0.576 15.78 843.83 13.71 0.580 15.91 846.35 13.82 0.596 16.38 848.85 13.94 0.576 15.80 853.85 14.17 0.588 16.14 858.74 14.40 0.585 16.07 863.59 14.63 0.554 15.15 868.59 14.86 0.543 14.81 873.64 15.09 0.545 14.87 878.61 15.32 0.551 15.06 883.56 15.55 0.550 15.02 893.64 16.02 0.582 15.96 897.14 16.19 0.573 15.71 902.09 16.42 0.536 14.63 907.05 16.65 0.552 15.09 912.05 16.88 0.531 14.46 917.03 17.11 0.606 16.68 921.93 17.34 0.531 14.46 926.85 17.57 0.614 16.91 934.35 17.92 0.612 16.84 936.79 18.03 0.592 16.28 941.54 18.25 0.555 15.17 961.23 19.17 0.611 16.82 970.96 19.62 0.623 17.16 980.91 20.08 0.631 17.42 990.83 20.54 0.632 17.43 1000.81 21.01 0.656 18.13 1005.84 21.21 0.645 17.82 1020.75 21.75 0.573 15.70 1030.69 22.11 0.618 17.04 1052.94 22.91 0.638 17.63 1072.99 23.64 0.621 17.12 1093.09 24.37 0.665 18.41 1123.21 25.45 0.672 18.60 1203.33 28.35 0.648 17.92 1213.35 28.90 0.679 18.82 1233.45 30.79 0.690 19.15 1253.25 32.65 0.665 18.42 1273.25 34.53 0.652 18.04 1293.09 36.39 0.661 18.30 1312.95 37.81 0.658 18.21 1332.95 38.57 0.664 18.39 1353.25 39.35 0.648 17.90 1363.25 39.73 0.638 17.63 1382.86 40.47 0.608 16.74 1402.43 41.22 0.622 17.13 1421.85 41.95 0.616 16.96 1441.38 42.70 0.635 17.53 1461.08 43.41 0.615 16.94 1480.80 43.92 0.627 17.29 1508.44 44.64 0.612 16.86 1518.33 44.89 0.657 18.17 1538.25 45.41 0.601 16.52 1558.46 45.93 0.608 16.74 1578.44 46.45 0.600 16.49 1598.25 46.96 0.609 16.78 1618.36 47.49 0.635 17.54 1638.54 48.01 0.655 18.12 1654.15 48.41 0.624 17.20 1664.33 48.68 0.672 18.62 1684.34 49.19 0.670 18.57 1704.15 49.71 0.655 18.12 1724.15 50.23 0.671 18.59 1744.15 50.74 0.665 18.40 1763.99 51.26 0.644 17.79 1783.69 51.82 0.671 18.59 1802.55 52.43 0.647 17.89 1812.43 52.75 0.669 18.52 1832.09 53.38 0.684 18.98 1851.95 54.02 0.700 19.44 1871.76 54.66 0.697 19.34 1889.29 55.23 0.696 19.32 1909.09 55.86 0.682 18.93 1928.86 56.50 0.669 18.52 1950.42 57.20 0.654 18.09 1960.45 57.52 0.673 18.65 1980.25 58.16 0.641 17.69 2000.13 58.80 0.662 18.32 2019.33 60.08 0.646 17.86 2031.71 61.05 0.656 18.16 2087.75 65.29 0.695 19.28 2100.23 65.61 0.646 17.86 2169.65 67.37 0.677 18.76 2210.23 68.40 0.681 18.89 2250.09 69.41 0.648 17.93 2319.41 71.17 0.645 17.83 2384.16 72.82 0.674 18.67 2453.71 74.32 0.670 18.57 2534.99 75.57 0.680 18.85 2564.69 76.02 0.704 19.55 2604.18 76.63 0.714 19.86 2684.65 77.86 0.735 20.46 2784.65 80.35 0.696 19.31 2794.82 81.51 0.700 19.43 2814.96 83.81 0.723 20.10 2834.80 85.54 0.659 18.25 2844.76 85.97 0.705 19.59 2904.85 88.57 0.691 19.17 2925.14 89.44 0.753 21.01 2945.06 90.31 0.749 20.90 2984.55 91.44 0.732 20.38 3050.25 92.74 0.727 20.24 3130.82 94.41 0.729 20.29 3200.93 96.18 0.735 20.48 3280.62 98.20 0.743 20.71 3350.16 101.02 0.750 20.91 3386.76 103.67 0.753 21.01 3424.26 106.58 0.739 20.60 3434.14 107.47 0.699 19.42 3493.79 111.63 0.706 19.62 3533.80 113.11 0.739 20.59 3573.78 114.58 0.711 19.76 3583.78 114.95 0.717 19.94 3624.06 116.43 0.647 17.88 3643.99 117.17 0.657 18.18 3684.06 117.81 0.730 20.33 3723.98 118.36 0.770 21.51 3754.18 118.78 0.791 22.12 3794.55 119.34 0.817 22.87 3852.13 120.14 0.802 22.44 3922.85 121.12 0.805 22.53 4001.94 122.21 0.793 22.18 4051.86 123.41 0.792 22.16 4114.58 125.54 0.779 21.77 4151.68 126.80 0.693 19.23 4181.78 127.83 0.656 18.15 4221.79 129.19 0.647 17.88 4261.61 130.54 0.649 17.93 4301.66 131.89 0.635 17.52 4371.31 135.21 0.616 16.97 4451.51 139.77 0.618 17.02 4522.15 143.78 0.628 17.34 4527.53 144.09 0.640 17.68