Bermuda Rise Holocene Cd/Ca and Stable Isotope Data ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: Please cite original reference when using these data, plus the data file URL and date accessed. NAME OF DATA SET: Bermuda Rise Holocene Cd/Ca and Stable Isotope Data LAST UPDATE: 12/2011 (Original receipt by WDC Paleo) CONTRIBUTORS: Keigwin, L.D. and E.A. Boyle IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2011-151 WDC PALEO CONTRIBUTION SERIES CITATION: Keigwin, L.D. and E.A. Boyle. 2011. Bermuda Rise Holocene Cd/Ca and Stable Isotope Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2011-151. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Keigwin, L.D. and E.A. Boyle. 2000. Detecting Holocene Changes in Thermohaline Circulation. Proceedings of the National Academy of Sciences of the United States of America, Vol. 97, No. 4, pp. 1343-1346, Feb. 15, 2000. http://www.jstor.org/stable/121472 ABSTRACT: Throughout the last glacial cycle, reorganizations of deep ocean water masses were coincident with rapid millennial-scale changes in climate. Climate changes have been less severe during the present interglacial, but evidence for concurrent deep ocean circulation change is ambiguous. ADDITIONAL REFERENCE: Boyle, E.A. and L.D. Keigwin. 1987. North Atlantic thermohaline circulation during the past 20,000 years linked to high-latitude surface temperature. Nature, Vol. 330, No. 6143, pp. 35-40, 5 November 1987. DOI: 10.1038/330035a0 GEOGRAPHIC REGION: Bermuda Rise, North Atlantic PERIOD OF RECORD: 12 KYrBP - present FUNDING SOURCES: US National Science Foundation Grants OCE-9709686 and 9402198 DATA FILE URLS: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/keigwin2000/keigwin2000.txt ftp://ftp.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/keigwin2000/keigwin2000.xls DESCRIPTION: Foraminiferal Cd/Ca and stable isotope data from Bermuda Rise sediment cores, used to reconstruct Holocene changes in thermohaline circulation. Cd/Ca and stable isotopes measured on Nutallides umbonifera and Cibicidoides spp., primarily C. wuellerstorfi, and Uvigerina. Bermuda Rise sediment core KNR31 GPC-5 and box cores HU98038 BC004A and BC004D: 33°41.2'N, 57°36.9'W, 4583m water depth DATA: 1. Bermuda Rise box core HU98038 BC004A Column 1: Depth cm Column 2: Age, Calendar years before present Column 3: Average Cd/Ca, Cibicidoides Column 4: Average Cd/Ca, Nutallides umbonifera Depth,cm CalAge,ka Cd/CaCib Cd/Ca N.umbo 0.5 0.047 0.091 1.5 0.141 2.5 0.236 0.08 3.5 0.33 0.087 4.5 0.424 0.075 5.5 0.433 0.081 6.5 0.442 0.074 0.062 7.5 0.451 0.074 8.5 0.46 9.5 0.469 0.076 0.078 9.5 0.469 0.071 10.5 0.619 0.087 0.082 11.5 0.701 0.084 0.067 12.5 0.783 0.097 0.084 13.5 0.866 0.068 0.074 14.5 0.897 0.083 15.5 0.928 0.062 0.091 16.5 0.959 17.5 0.989 18.5 1.02 19.5 1.052 20.5 1.083 21.5 1.114 22.5 1.146 23.5 1.177 24.5 1.19 25.5 1.203 26.5 1.216 27.5 1.228 28.5 1.241 29.5 1.254 30.5 1.482 31.5 1.709 32.5 1.937 33.5 2.062 34.5 2.188 35.5 2.313 36.5 2.438 37.5 2.564 38.5 2.689 39.5 2.719 40.5 2.748 41.5 2.778 42.5 2.808 43.5 2.837 44.5 2.867 2. Bermuda Rise box core HU89038 BC-004D Column 1: Depth cm Column 2: Age, Calendar years before present Column 3: Average Cd/Ca, Nutallides umbonifera Column 4: Average Cd/Ca, Cibicidoides wuellerstorfi Depth,cm CalAge,ka Cd/Ca,N.umbo Cd/Ca,C.wueller 0.5 0.0382 0.078 1.5 0.1145 0.105 0.116 3.5 0.2673 0.082 7.5 0.475 0.065 8.5 0.476 0.073 9.5 0.477 0.092 10.5 0.478 11.5 0.5683 0.079 0.087 12.5 0.074 0.061 13.5 0.09 0.071 13.5 14.5 0.095 15.5 16.5 0.062 0.054 17.5 0.056 3. Bermuda Rise box core HU89038 BC-004D stable isotopes, composite of Finigan and VG903 data Column 1: Age, ka Column 2: Average d18O, Nutallides umbonifera, per mil PDB Column 3: Average d13C, Nutallides umbonifera, per mil PDB CalAge,yrBP d18O-N.umbo d13C-M.umbo 0 38.2 2.87 0.18 76.4 114.5 2.77 0.15 152.7 190.9 2.91 0.27 229.1 267.3 305.5 343.6 381.8 420 2.81 0.17 442.5 465 2.9 0.38 470 475 2.83 0.68 475.5 476 2.85 0.52 476.5 477 2.79 0.6 477.5 478 2.87 0.74 523.2 568.3 2.79 0.51 613.5 658.7 2.88 0.63 703.8 749 2.79 0.63 779 809 2.8 0.65 839 869 2.72 0.67 899 929 2.84 0.82 959 972.4 2.71 0.67 985.8 999.2 2.91 0.63 1012.6 1026 2.86 0.46 1039.5 1052.9 2.87 0.63 1066.3 1079.7 2.92 0.76 1093.1 1106.5 2.83 0.69 1119.9 1133.3 3.04 0.78 1146.7 1160.1 2.92 0.75 1173.5 1187 2.82 0.7 1200.4 1213.8 2.84 0.76 1227.2 1240.6 2.88 0.56 1254 1295.4 2.69 0.65 1336.7 1378.1 2.72 0.73 1419.5 1460.8 2.92 0.71 1502.2 1543.5 2.91 0.66 1584.9 1626.3 2.72 0.68 1667.6 1709 2.86 0.77 1790.7 1872.3 2.8 0.72 1954 2035.7 2.81 0.77 2117.3 2199 2.62 0.48 2280.7 2362.3 3.05 0.58 2444 2525.7 2.81 0.61 2607.3 2689 2.88 0.71 2692.5 2696 2.88 0.68 2699.5 2703 2.74 0.7 2706.5 2710 2.73 0.74 2713.5 2717 2.84 0.84 2720.5 2724 2.73 0.78 2727.5 2731 2.64 0.62 2788.7 2846.3 3.05 0.61 2904 2961.7 2.72 0.79 3019.3 3077 2.77 0.76 3086.5 3096 2.75 0.81 3105.5 3115 2.79 0.71 3125 4. EN120 GGC-1 Cd/Ca data (Boyle and Keigwin, 1987) Column 1: Age, Calendar years before present Column 2: Average Cd/Ca, all species Column 3: Average Cd/Ca, Nutallides umbonifera Column 4: Average Cd/Ca, Cibicidoides Column 5: Average Cd/Ca, Uvigerina CalAge,ka allCd/Ca umboCd/Ca cibCd/Ca uviCd/Ca 0.8 0.073 0.072 0.073 0.9529 0.088 0.088 1.0394 0.08 0.08 1.1258 0.087 0.087 1.2123 0.075 0.075 1.2988 0.083 0.082 0.085 1.3852 0.08 0.08 1.511 0.076 0.076 1.581 0.088 0.088 1.6517 0.081 0.08 0.083 1.7924 0.073 0.073 1.9331 0.076 0.076 2.0739 0.087 0.081 0.093 2.2146 0.09 0.072 0.127 2.3553 0.106 0.106 2.496 0.104 0.104 2.6367 0.082 0.082 2.7685 0.093 0.093 2.8774 0.094 0.094 2.9863 0.082 0.082 3.0953 0.078 0.078 3.2042 0.099 0.099 3.3131 0.114 0.114 3.422 0.097 0.097 3.7 0.07 0.07 3.9784 0.084 0.077 0.098 4.2665 0.086 0.086 4.5546 0.073 0.073 4.8384 0.084 0.084 4.9842 0.086 0.086 5.13 0.096 0.096 5.2876 0.111 0.111 5.5364 0.077 0.077 5.7851 0.086 0.086 6.0339 0.105 0.105 6.2826 0.086 0.086 6.5314 0.075 0.075 6.7802 0.076 0.076 7.0289 0.09 0.09 7.2777 0.075 0.075 7.5264 0.069 0.069 7.7752 0.077 0.077 8.0239 0.072 0.072 8.2996 0.077 0.077 8.6089 0.071 0.071 8.9182 0.075 0.075 9.2274 0.075 0.075 9.5367 0.089 0.089 9.846 0.096 0.095 0.097 10.2121 0.103 0.095 0.127 10.5853 0.102 0.093 0.127 10.9585 0.13 0.123 0.137 11.3317 0.122 0.104 0.14 11.7049 0.134 0.129 0.139 12.0781 0.134 0.124 0.143 12.269 0.135 0.135 12.4513 0.131 0.129 0.133 0.127 0.125 0.128 0.109 0.109 0.115 0.115 0.081 0.081 0.1 0.1 0.076 0.076 0.099 0.086 0.111 0.089 0.089 0.094 0.094 0.11 0.11 0.158 0.158 0.156 0.156 0.135 0.135 0.131 0.131 0.12 0.12 0.13 0.13 0.125 0.125 0.127 0.127 0.105 0.105 0.133 0.133 0.111 0.111 0.149 0.149 0.17 0.17 0.222 0.222 0.177 0.177 0.125 0.125 0.144 0.144 0.14 0.14 0.124 0.124 0.153 0.153 0.155 0.155 0.194 0.194 0.216 0.216 5. Bermuda Rise core KNR31 GPC5 composite of many years of d13C analyses on N. umbonifera CalAge,ka avg.N.umbo d13C, per mil PDB 0.78 0.84 0.9198 0.83 1.013 0.86 1.1061 0.84 1.1993 0.76 1.2925 0.83 1.3741 0.85 1.409 0.47 1.5263 0.9 1.624 0.79 1.6826 0.81 1.7608 0.85 1.839 0.9 1.9171 0.81 1.9953 0.79 2.0735 0.8 2.1517 0.73 2.308 0.81 2.4057 0.88 2.4644 0.84 2.6207 0.97 2.7683 0.97 2.8893 0.88 3.0103 0.9 3.1314 0.9 3.2524 0.88 3.3735 0.88 3.594 0.96 3.914 0.76 4.234 0.85 4.554 0.76 4.8542 0.88 5.0161 0.93 5.178 0.95 5.3972 0.95 5.6737 0.98 5.9502 0.89 6.2267 0.86 6.5031 0.87 6.7796 0.91 7.0561 0.88 7.3326 0.95 7.609 0.9 7.9408 0.84 8.162 0.89 8.5056 0.9 8.8492 0.87 9.1928 0.85 9.5364 0.75 9.88 0.69 10.2947 0.86 10.7093 0.73 11.124 0.75 11.5387 0.65 11.9533 0.22 12.368 0.49