Eastern Equatorial Atlantic Quaternary Stable Isotope Data ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE CONTRIBUTORS WHEN USING THIS DATA!!!!! NAME OF DATA SET: Eastern Equatorial Atlantic Quaternary Stable Isotope Data LAST UPDATE: 3/2005 (Original receipt by WDC Paleo) CONTRIBUTOR: Michael Bird, University of St. Andrews IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2005-030 SUGGESTED DATA CITATION: Bird, M.I. and J.A. Cali. 2005. Eastern Equatorial Atlantic Quaternary Stable Isotope Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2005-030. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Bird, M.I. and J.A. Cali. 2002. A revised high-resolution oxygen-isotope chronology for ODP-668B: implications for Quaternary biomass burning in Africa Global and Planetary Change 33, pp. 73–76. Bird, M.I. and J.A. Cali. 1998. A million-year record of fire in sub-Saharan Africa. Nature, Vol. 394, pp. 767-769, 20 August 1998. ABSTRACT: (Bird and Cali 2002) We present a high-resolution oxygen-isotope chronology to Stage 13 for core ODP-668B, Sierra Leone Rise, east equatorial Atlantic. Observed variations in the abundance of oxidation resistant elemental carbon (OREC) in this core are reinterpreted in the light of this revised chronology, which differs significantly from that proposed by Bird and Cali [Nature 394 (1998) 767]. Peaks in OREC abundance are considered to be related to periods of intense biomass burning in adjacent areas of sub-Saharan Africa during periods of rapid climate change. OREC peaks do not occur during peak glacial times possibly due to low fuel loads and generally cool/dry climate. The most recent OREC peak in the current interglacial period is not unique, as a peak of similar intensity occurs at the peak of the Stage 7 interglacial. Therefore, an anthropogenic origin for the most recent peak cannot be unequivocally established. GEOGRAPHIC REGION: Eastern Equatorial Atlantic, Sierra Leone Rise. PERIOD OF RECORD: 1 MMYrBP - present DESCRIPTION: Eastern Equatorial Atlantic Quaternary Stable Isotope Data. Core ODP668B: 4°46.23 N, 20°55.62 W, Water depth 2693 m. Stable isotope data from G. ruber >250 micrometer. DATA: 1. Core ODP 668B G. ruber stable isotope data Column 1: Core Column 2: Section Column 3: Section depth, cm. Column 4: Total depth, cm. below sea floor Column 5: Age, KYears Before Present Column 6: G. ruber d18O per mil vPDB Column 7: G. ruber d13C per mil vPDB core section cm depth age d18O d13C 1 1 2 2 1.1 -1.43 1.96 1 1 19 19 10.3 -0.76 1.77 1 1 25 25 13.5 -0.87 1.42 1 1 29 29 17.1 -0.26 1.19 1 1 35 35 22.5 -0.33 1.03 1 1 41 41 27.6 -0.51 1.65 1 1 50 50 32.6 -0.44 1.1 1 1 55 55 35.4 -0.5 1.6 1 1 60 60 38.2 -0.48 1.58 1 1 64 64 40.4 -0.28 1.64 1 1 70 70 43.7 -0.56 1.44 1 1 76 76 47.1 -0.41 1.42 1 1 81 81 49.9 -0.51 1.62 1 1 96 96 59.5 -0.91 1.48 1 1 100 100 63.0 -0.45 1.4 1 1 110 110 71.1 -1.11 1.71 1 1 116 116 74.2 -1.18 1.75 1 1 125 125 79.0 -1.18 1.92 1 1 130 130 81.6 -1.15 1.99 1 1 139 139 86.4 -1.27 1.81 1 2 5 155 94.8 -1.22 1.52 1 2 9 159 96.9 -1.12 1.64 1 2 20 170 102.7 -1.33 1.35 1 2 24 174 104.8 -1.27 1.24 1 2 28 178 106.9 -1.62 1.28 1 2 35 185 110.6 -1.68 1.82 1 2 39 189 112.8 -1.96 1.29 1 2 45 195 115.9 -1.29 0.92 1 2 50 200 118.6 -1.41 1.11 1 2 60 210 123.8 -1.16 0.89 1 2 65 215 126.5 -0.21 0.89 1 2 70 220 132.7 -0.21 1 1 2 74 224 138.3 0.01 1.29 1 2 80 230 146.8 -0.08 1.09 1 2 85 235 153.9 -0.34 1.25 1 2 90 240 160.9 -0.13 0.95 1 2 93 243 165.2 -0.4 1.47 2 1 5 275 209.7 -0.61 1.18 2 1 8 278 211.8 -1.06 1.6 2 1 15 285 216.6 -0.88 1.34 2 1 20 290 220.1 -1.35 1.18 2 1 25 295 223.6 -0.77 1 2 1 30 300 227.0 -0.81 1.12 2 1 48 318 239.5 -1.2 1.29 2 1 67 337 252.7 -0.39 0.99 2 1 75 345 258.3 -0.63 0.7 2 1 85 355 265.2 -0.76 1.39 2 1 105 375 281.8 -0.32 1.16 2 1 110 380 289.7 -0.38 1.18 2 1 110 380 289.7 -0.5 1.12 2 1 118 388 302.4 -0.05 1.51 2 1 125 395 312.6 -0.98 1.66 2 1 135 405 318.4 -0.89 1.24 2 1 140 410 321.4 -0.99 1.53 2 1 144 414 323.7 -1.13 1.3 2 2 5 425 330.1 -1.01 1.43 2 2 10 430 333.1 -0.97 1.48 2 2 15 435 336.0 -0.93 1.65 2 2 18 438 337.7 -1.27 1.51 2 2 25 445 341.8 -1.23 1.47 2 2 30 450 344.8 -1.2 1.49 2 2 35 455 347.7 -1.7 1.64 2 2 40 460 350.6 -1.4 1.48 2 2 45 465 353.5 -1.21 1.43 2 2 50 470 356.5 -1.54 1.28 2 2 56 476 360.0 -1.79 1.15 2 2 75 495 371.1 -1.17 1.04 2 2 85 505 377.9 -0.02 1.3 2 2 90 510 381.7 -0.1 1.13 2 2 95 515 385.5 -0.27 1.27 2 2 115 535 400.8 -0.55 1.09 2 2 130 550 411.0 -0.76 1.19 2 2 136 556 413.0 -1.04 1.33 2 3 10 580 421.1 -1.24 1.39 2 3 15 585 422.8 -1.27 1.48 2 3 18 588 423.8 -1.55 1.63 2 3 25 595 426.1 -1.28 1.52 2 3 30 600 427.8 -0.71 1.39 2 3 35 605 429.5 -1.28 1.82 2 3 39 609 430.8 -1.99 1.88 2 3 45 615 432.9 -1.92 1.71 2 3 50 620 434.6 -1.92 1.55 2 3 56 626 436.6 -1.98 1.8 2 3 65 635 439.6 -1.49 1.49 2 3 70 640 441.3 -1.42 1.35 2 3 77 647 443.6 -0.59 1.42 2 3 85 655 456.1 0 1.25 2 3 90 660 464.8 -0.11 1.12 2 3 95 665 473.5 0.12 1.3 2 3 99 669 480.4 -0.38 1.54 2 3 105 675 490.9 -0.22 1.06 2 3 110 680 499.6 -0.5 1.26 2 3 117 687 510.3 -0.71 1.38 2 3 125 695 512.8 -0.59 1.36 2 3 130 700 514.4 -0.64 1.3 2 4 16 736 525.9 -1.4 1.97 2 4 42 762 534.2 -1.5 1.87 2 4 87 807 544.2 -0.89 1.38 2 4 109 829 547.7 -1.13 1.54 2 4 125 845 550.2 -1.39 1.95 2 5 17 887 581.1 -1.37 1.28 2 5 67 937 619.1 -0.38 0.89 2 5 93 963 636.1 -0.47 0.76 2 5 113 983 649.1 -0.75 1.33 2 5 143 1003 660.8 -1.14 1.23 2 6 20 1030 673.4 -1.55 1.64 2 6 35 1055 684.4 -0.7 1.01 2 6 56 1076 693.3 -0.65 0.88 2 6 99 1119 711.6 -0.83 1.35 3 1 7 1227 -1.02 1.16 3 1 28 1248 -1.12 1.24 3 1 86 1306 -0.43 0.61 3 1 108 1328 -1.06 1.02 3 1 127 1347 -0.53 0.7 3 2 55 1425 -1.12 1.13 3 3 86 1606 -1.39 1.31 3 5 69 1889 -1.36 1.45 3 5 112 1932 -1.22 1.34 3 6 11 1981 -1.79 2.08 3 6 99 2069 -1.15 1.56