Pliocene Oxygen Isotope Record, DSDP 610 ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE CONTRIBUTORS WHEN USING THIS DATA!!!!! NAME OF DATA SET: Pliocene Oxygen Isotope Record, DSDP 610 LAST UPDATE: 2/2007 (Original Receipt by WDCA Paleo) CONTRIBUTOR: Mudelsee, M. IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2007-022 SUGGESTED DATA CITATION: Mudelsee and Raymo, 2007, Pliocene Oxygen Isotope Record, DSDP 610 IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series #2007-022. NOAA/NGDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE(S) (OXYGEN ISOTOPE DATA): Raymo, M. E., D. Hodell, and E. Jansen (1992), Response of deep ocean circulation to initiation of northern hemisphere glaciation (3-2 Ma), Paleoceanography, 7, 645-672. ORIGINAL REFERENCE (TIMESCALE): Mudelsee, M., and M.E. Raymo, 2005. Slow dynamics of the Northern Hemisphere Glaciation. Paleoceanography 20, 4, PA4022 (doi: 10.1029/2005PA001153). GEOGRAPHIC REGION: Atlantic Ocean PERIOD OF RECORD: 2 Myr to 4 Myr before the present DESCRIPTION: Oxygen isotope record, adjusted to seawater d18O level. See ORIGINAL REFERENCE(S) (OXYGEN ISOTOPE DATA) and Mudelsee, M., and M.E. Raymo, 2005. Slow dynamics of the Northern Hemisphere Glaciation. Paleoceanography 20, 4, PA4022 (doi: 10.1029/2005PA001153). CORE NAME: DSDP 610 LOCATION LATITUDE: 53 deg 13' N LOCATION LONGITUDE: 18 deg 53' W WATER DEPTH: 2417 m FORAMINIFERA: Cibicidoides spp. HABITAT: benthic ADJUSTMENT: original d18O + 0.64 per mil NUMBER OF DATA POINTS: 301 ABSTRACT: Unraveling the dynamics of the Northern Hemisphere Glaciation (NHG) in the Pliocene is a key step toward a quantitative theory of the climate transition from a greenhouse to an icehouse world. Extracting the ice-volume signal from marine oxygen isotope (d18O) records corrupted with 'temperature noise' can be accomplished using statistical time series analysis. We use 45 d18O records from benthic and planktonic foraminifera and globally distributed sites to reconstruct the dynamics of NHG initiation. We compare d18O amplitudes with those of temperature proxy records and estimate a global ice-volume related increase of 0.4 per mil, equivalent to an overall sea-level lowering of 43 meters. We find the NHG started significantly earlier than previously assumed, as early as 3.6 Myr, and ended at 2.4 Myr. This long-term increase points to slow, tectonic forcing such as closing of ocean gateways or mountain building, as the root cause of the NHG. (Mudelsee, M., and M.E. Raymo, 2005. Paleoceanography 20, 4, PA4022 (doi: 10.1029/2005PA001153).) FUNDING SOURCE: Deutsche Forschungsgemeinschaft (DFG), Bonn, Germany (MU 1595/2). CONTACT: Dr. Manfred Mudelsee Climate Risk Analysis Wasserweg 2 06114 Halle (S) Germany Telephone: +49 (0)345 5323860 Email: mudelsee@climate-risk-analysis.com URL: http://www.climate-risk-analysis.com DATA: Core Depth Age d18O (m) (kyr) (per mil) 116.25 2335.622 3.670 120.76 2436.220 3.590 120.91 2439.566 3.210 121.03 2442.243 3.310 121.21 2446.258 3.190 121.37 2449.827 3.180 121.50 2452.727 2.740 121.66 2456.296 3.280 121.83 2460.088 3.430 121.92 2462.095 2.910 122.23 2469.010 3.340 122.40 2472.802 3.710 122.51 2475.256 3.370 122.71 2479.717 4.010 122.87 2483.286 3.560 123.02 2486.632 3.670 123.14 2489.308 3.160 123.29 2492.654 2.990 123.46 2496.446 3.070 123.59 2499.346 3.230 123.76 2503.138 3.590 124.36 2516.521 4.530 124.54 2520.536 4.130 124.66 2523.213 3.600 124.81 2526.559 3.530 124.96 2529.905 3.360 125.11 2533.251 3.230 125.26 2536.596 3.020 125.42 2540.165 3.300 125.56 2543.288 3.140 125.69 2546.188 3.370 125.85 2549.757 3.420 126.00 2553.103 3.550 126.15 2556.449 3.570 126.31 2560.018 3.370 126.47 2563.586 3.180 126.61 2566.709 3.490 126.76 2570.055 3.220 126.91 2573.401 3.430 127.10 2577.639 3.270 127.19 2579.647 3.300 127.35 2583.216 3.180 127.51 2586.484 3.450 127.83 2592.418 3.290 127.96 2594.829 4.250 128.11 2597.611 3.570 128.26 2600.393 3.620 128.41 2603.175 3.390 128.56 2605.956 3.270 128.69 2608.367 3.270 128.86 2611.520 3.330 129.01 2614.302 3.480 129.16 2617.084 3.160 129.31 2619.865 3.680 129.46 2622.647 4.030 129.61 2625.429 3.660 129.76 2628.211 3.930 129.91 2630.993 3.910 130.08 2634.146 3.600 130.19 2636.186 3.040 130.36 2639.338 3.520 130.51 2642.120 3.370 130.66 2644.902 3.200 130.81 2647.684 3.080 130.96 2650.466 3.290 131.11 2653.247 3.400 131.26 2656.029 3.210 131.42 2658.996 3.210 131.56 2661.593 3.410 131.69 2664.004 3.450 131.87 2667.342 3.520 132.01 2669.938 4.110 132.16 2672.720 3.780 132.34 2676.058 4.040 132.46 2678.284 4.220 132.61 2681.065 4.020 132.76 2683.847 4.270 132.91 2686.629 3.870 133.95 2705.916 4.240 134.10 2708.698 3.910 134.23 2711.109 3.800 134.40 2714.262 3.780 134.55 2717.044 3.510 134.71 2720.011 3.310 134.85 2722.607 3.350 135.01 2725.574 3.360 135.19 2728.913 3.340 135.29 2730.767 3.290 135.45 2733.735 3.370 135.60 2736.517 3.530 135.74 2739.113 3.570 135.91 2742.266 3.520 136.06 2745.047 3.680 136.21 2747.829 3.820 136.34 2750.240 3.880 136.51 2753.393 3.710 136.68 2756.545 3.410 136.79 2758.585 3.360 136.94 2761.367 3.890 137.11 2764.520 3.850 137.22 2766.560 3.350 137.41 2770.084 3.380 137.53 2772.309 3.970 137.71 2775.647 3.350 137.83 2777.873 3.790 138.16 2783.993 3.860 138.29 2786.404 3.990 138.45 2789.371 4.360 138.60 2792.153 4.340 138.72 2794.378 3.710 138.91 2797.902 3.580 139.06 2800.684 3.530 139.20 2803.280 4.190 139.36 2806.247 4.050 139.51 2809.029 3.630 139.70 2812.553 3.740 139.79 2814.222 3.860 139.94 2817.004 3.640 140.09 2819.785 3.750 140.22 2822.197 3.480 140.41 2825.720 4.020 140.56 2828.502 3.670 140.69 2830.913 4.200 140.84 2833.695 3.480 141.01 2836.847 4.110 141.16 2839.629 4.090 141.29 2842.040 3.590 141.44 2844.822 3.670 141.59 2847.604 3.670 141.72 2850.015 3.530 141.91 2853.538 3.660 142.05 2856.135 3.600 142.21 2859.102 3.740 142.35 2861.698 3.860 142.51 2864.666 3.930 142.66 2867.448 3.700 142.79 2869.858 4.080 143.53 2883.582 3.180 143.69 2886.549 2.990 143.81 2888.775 3.440 144.01 2892.484 3.270 144.16 2895.266 3.330 144.31 2898.047 3.350 144.46 2900.829 3.220 144.61 2903.611 3.280 144.87 2908.433 3.640 145.08 2912.327 3.530 145.18 2914.182 3.720 145.33 2916.964 3.690 145.68 2923.455 3.070 145.91 2927.720 3.290 145.96 2928.647 3.030 146.11 2931.429 3.150 146.31 2935.138 2.750 146.39 2936.622 2.920 146.56 2939.775 3.310 146.71 2942.557 3.330 146.83 2944.782 3.130 147.01 2948.120 3.350 147.16 2950.902 3.540 147.31 2953.684 3.690 147.46 2956.466 3.590 147.61 2959.247 3.420 148.21 2970.375 3.710 148.51 2975.938 3.200 148.66 2978.720 3.290 148.81 2981.502 3.210 148.96 2984.284 3.490 149.11 2987.066 3.530 149.31 2990.775 3.810 149.39 2992.258 3.850 149.56 2995.411 3.810 149.83 3000.418 3.300 150.31 3009.320 3.770 150.46 3012.102 3.630 150.61 3014.884 3.690 150.76 3017.666 3.650 150.89 3020.076 3.260 151.06 3023.229 3.420 151.21 3026.011 3.470 151.33 3028.237 3.090 151.51 3031.574 3.520 151.66 3034.356 3.150 151.81 3037.138 3.200 151.96 3039.920 3.270 152.11 3042.702 3.240 152.26 3045.820 3.190 152.39 3048.777 3.140 153.16 3066.291 3.360 153.31 3069.702 3.140 153.46 3073.114 3.160 153.61 3076.526 3.270 153.76 3079.937 3.200 153.91 3083.349 3.130 154.06 3086.761 3.190 154.21 3090.173 3.170 154.36 3093.584 3.290 154.49 3096.542 3.500 154.66 3100.408 3.370 154.81 3104.880 3.000 154.96 3110.280 3.140 155.11 3115.680 3.220 155.26 3121.080 3.600 155.41 3126.480 3.510 155.56 3131.880 3.520 155.71 3137.280 3.390 155.91 3144.480 3.280 155.99 3147.360 3.210 156.16 3153.480 3.310 156.31 3158.880 3.310 156.46 3164.280 3.000 156.61 3169.680 3.210 156.76 3175.080 3.310 156.91 3180.480 3.280 157.06 3185.880 3.310 157.21 3191.280 3.400 157.36 3196.680 3.210 157.49 3201.360 3.180 157.66 3207.480 3.520 157.81 3211.497 3.210 158.11 3217.110 3.190 158.26 3219.917 3.220 158.41 3222.724 3.200 158.56 3225.530 3.230 158.71 3228.337 3.200 158.91 3232.079 3.340 158.99 3233.576 3.230 159.15 3236.570 3.310 159.31 3239.563 3.040 159.44 3241.996 3.300 159.61 3245.177 3.360 159.79 3248.545 2.950 159.91 3250.790 3.540 160.06 3253.597 3.350 160.31 3258.274 3.410 160.37 3259.397 3.330 160.65 3264.636 3.400 160.81 3267.630 3.440 161.11 3273.243 3.570 161.26 3276.050 3.770 161.41 3278.857 4.060 161.71 3284.470 4.000 161.86 3287.277 3.880 162.91 3315.412 2.730 163.05 3321.244 3.510 163.21 3327.908 2.710 163.36 3334.156 1.800 163.51 3340.404 2.840 163.66 3346.652 2.360 163.81 3352.900 3.130 163.96 3359.148 3.130 164.09 3364.563 2.450 164.25 3371.228 3.250 164.41 3377.892 3.160 164.54 3383.307 3.420 165.15 3408.715 3.270 165.31 3415.380 3.360 165.59 3427.043 3.170 165.91 3440.372 3.230 166.06 3446.620 3.240 166.21 3452.868 3.350 166.51 3465.364 3.180 166.66 3471.612 3.340 166.81 3477.860 3.340 166.96 3484.108 3.330 167.08 3489.107 3.500 167.26 3496.604 3.110 167.40 3502.435 3.290 167.56 3509.100 3.160 167.71 3515.348 2.980 167.86 3521.596 3.100 168.01 3527.844 3.160 168.16 3534.092 3.060 168.31 3540.340 3.440 168.49 3547.838 3.660 168.76 3559.084 3.630 168.90 3567.427 3.360 169.05 3579.057 3.040 169.21 3591.462 3.160 169.44 3609.294 3.210 169.51 3614.720 3.040 169.65 3625.575 3.460 169.81 3637.980 3.240 169.96 3649.610 3.180 170.09 3659.688 3.430 170.26 3672.869 3.390 172.36 3835.684 3.180 172.51 3847.313 3.120 172.66 3858.944 3.180 172.81 3870.573 3.230 172.96 3882.203 3.100 173.11 3893.832 2.780 173.26 3905.462 2.530 173.41 3917.092 2.850 173.56 3928.721 2.880 173.69 3938.801 2.490 174.01 3963.610 3.070 174.16 3975.240 3.170 174.31 3986.869 2.950 174.46 3998.500 3.070 174.61 4010.129 2.820