Equatorial Pacific Planktonic Foraminifera Carbon and Oxygen Isotope Data ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE CONTRIBUTORS WHEN USING THIS DATA!!!!! NAME OF DATA SET: Equatorial Pacific Planktonic Foraminifera Carbon and Oxygen Isotope Data LAST UPDATE: 1/2003 (Original Receipt by WDC Paleo) CONTRIBUTORS: Howard J. Spero and David W. Lea IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2003-003 SUGGESTED DATA CITATION: Spero, H. J. and D.W. Lea, 2002, Equatorial Pacific Planktonic Foraminifera Carbon and Oxygen Isotope Data, IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2003-003. NOAA/NGDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Spero, H. J. and D.W. Lea, 2002, The cause of carbon isotope minimum events on glacial terminations. Science 296:522-525, 19 April 2002. ADDITIONAL REFERENCE: Lea, D.W., D.K. Pak, and H.J. Spero, 2000, Climate Impact of Late Quaternary Equatorial Pacific Sea Surface Temperature Variations, Science 289:1719-1724, 8 September 2000. GEOGRAPHIC REGION: Cocos Ridge, Eastern Pacific Ocean PERIOD OF RECORD: 150 KYrBP - present DESCRIPTION: Carbon and oxygen isotope data from planktonic foraminifera in equatorial Pacific sediment core, TR163-19, Cocos Ridge, 2.2583N, 90.9516E, 2348m. depth. New data from Neogloboquadrina dutertrei and Gloiberinoides ruber, combined with previously published G. ruber Mg/Ca and d18O data (Lea et al., 2000) demonstrate deglacial carbon isotope minimum events initiate with tropical warming, and directly link Southern Ocean deglaciation circulation changes with near surface tropical carbon isotope excursions. ABSTRACT: The occurrence of carbon isotope minima at the beginning of glacial terminations is a common feature of planktic foraminifera carbon isotopic records from the Indo-Pacific, Subantarctic and South Atlantic. We use the d13C record of a thermocline dwelling foraminifera, Neogloboquadrina dutertrei, and surface temperature estimates from the eastern equatorial Pacific to demonstrate that onset of d13C minimum events and the initiation of Southern Ocean warming occurred simultaneously. Timing agreement between the marine record and the d13C minimum in an Antarctic atmospheric record suggests that the deglacial events were a response to the breakdown of surface water stratification, renewed Circumpolar Deep Water upwelling, and advection of low d13C waters to the convergence zone at the Subantarctic front. Based on age agreement between the absolute d13C minimum in surface records and the shift from low to high d13C in the deep South Atlantic, we suggest that the d13C rise that marks the end of the carbon isotope minima was due to the resumption of North Atlantic Deep Water influence in the Southern Ocean. DATA: Stable isotope data are relative to PDB 1. Core TR163-19 Neogloboquadrina dutertrei Depth (cm) Age (kybp) d13C d18O 1 1.1 1.88 -0.02 4 1.9 1.97 -0.06 9 3.3 2.21 -0.15 14 4.7 1.92 0.01 19 6.1 1.96 0.06 24 7.5 1.75 0.09 29 8.9 1.65 0.22 34 10.2 1.79 0.26 39 11.6 1.69 0.37 44 13.0 1.73 0.55 49 14.4 1.66 0.90 54 15.8 1.47 1.25 59 17.2 1.65 1.11 64 18.5 1.69 0.99 69 19.9 1.94 1.11 74 20.7 1.88 1.18 79 21.6 1.93 1.04 84 22.5 1.82 1.24 89 23.5 1.97 1.18 94 24.4 1.94 1.09 99 25.3 1.83 1.13 104 26.2 2.07 0.99 109 27.1 1.87 1.13 114 28.0 1.92 1.01 119 29.1 1.95 1.12 124 30.2 2.07 0.78 129 31.3 1.81 0.98 134 32.3 1.88 0.71 139 33.4 1.76 0.86 144 34.5 1.89 0.60 149 35.6 2.01 0.52 154 36.7 1.82 0.91 159 37.8 1.97 0.71 164 38.9 1.95 0.80 174 40.0 1.89 0.73 184 41.0 1.87 0.66 194 42.1 1.88 0.68 204 43.2 1.87 0.64 209 45.4 1.83 0.63 220 47.6 1.94 0.64 224 48.7 1.91 0.20 234 49.7 1.80 0.41 244 51.9 1.66 0.75 254 56.0 1.86 0.65 264 60.3 2.00 0.52 274 62.8 1.93 0.70 284 65.4 1.88 0.80 294 68.2 2.12 0.48 304 71.0 2.00 0.48 314 75.5 1.89 0.75 324 80.0 1.95 0.70 334 83.3 1.64 0.46 344 86.5 1.95 0.55 354 89.5 1.95 0.32 364 94.0 1.89 0.19 374 100.0 1.77 0.20 384 106.7 1.59 -0.13 389 112.0 1.92 -0.81 394 116.0 1.80 -0.66 399 118.0 1.71 -0.83 404 120.0 1.32 0.01 409 124.0 1.40 -0.02 414 128.0 1.11 0.60 419 129.0 1.41 -0.11 423 130.3 1.08 0.87 429 131.0 1.56 0.67 434 132.3 1.80 0.97 439 133.6 1.79 0.60 444 134.9 1.53 1.08 449 136.1 1.75 0.64 454 137.4 1.76 0.70 464 138.9 1.66 0.75 474 140.3 1.72 0.82 484 143.1 1.59 0.81 494 146.0 1.70 0.73 504 150.0 1.50 0.40 2. Globigerinoides ruber Note: G. ruber d18O data was originally published in Lea et al., (2000); Science 289:1719-1724 Stable isotope data are relative to PDB Depth (cm) Age (kybp) d13C d18O 1 1.1 1.52 -2.07 4 1.9 1.54 -2.27 9 3.3 1.86 -2.30 14 4.7 1.81 -2.11 19 6.1 1.91 -2.41 24 7.5 1.60 -2.10 29 8.9 1.48 -2.10 34 10.2 1.55 -1.78 39 11.6 1.44 -1.81 44 13.0 1.28 -1.01 49 14.4 1.17 -1.12 54 15.8 1.53 -1.22 59 17.2 1.08 -0.72 64 18.5 1.38 -0.51 69 19.9 1.37 -0.69 74 20.7 1.04 -0.37 79 21.6 1.31 -0.71 84 22.5 1.19 -0.78 89 23.5 1.28 -0.79 94 24.4 1.28 -0.95 99 25.3 1.27 -0.81 104 26.2 1.29 -1.04 109 27.1 1.47 -0.77 114 28.0 1.54 -1.23 119 29.1 1.32 -0.93 124 30.2 1.25 -1.05 129 31.3 1.35 -0.86 134 32.3 1.24 -0.66 139 33.4 1.32 -1.14 144 34.5 1.31 -0.94 149 35.6 1.40 -1.15 154 36.7 1.40 -1.14 159 37.8 1.52 -0.78 164 38.9 1.38 -1.07 169 40.0 1.41 -0.86 174 41.0 1.44 -0.95 179 42.1 1.29 -1.06 184 43.2 1.38 -1.21 189 44.3 1.37 -0.96 194 45.4 1.01 -1.20 199 46.5 1.34 -0.89 204 47.6 1.24 -1.27 209 48.7 1.31 -1.13 214 49.7 1.51 -1.01 220 51.0 1.25 -0.99 224 51.9 0.97 -1.18 229 53.0 1.25 -1.38 234 56.0 1.07 -1.11 239 59.0 1.29 -1.21 244 60.3 1.26 -0.83 249 61.5 1.40 -0.88 254 62.8 1.19 -1.15 259 64.0 1.36 -0.86 264 65.4 1.23 -1.10 269 66.8 1.52 -1.00 274 68.2 1.20 -1.24 279 69.6 1.39 -0.89 284 71.0 1.21 -1.47 289 73.3 1.74 -1.47 294 75.5 1.82 -1.92 299 77.8 1.82 -1.71 304 80.0 1.56 -1.86 309 81.7 1.57 -1.63 314 83.3 1.58 -1.35 319 85.0 1.75 -1.17 324 86.5 1.70 -1.51 329 88.0 1.70 -1.46 334 89.5 1.60 -1.51 339 91.0 1.71 -1.40 344 94.0 1.57 -1.84 349 97.0 1.57 -1.77 354 100.0 1.52 -2.02 359 103.3 1.53 -1.67 364 106.7 1.45 -1.74 369 110.0 1.60 -1.09 374 112.0 1.47 -2.17 379 114.0 1.57 -2.04 384 116.0 1.27 -2.09 389 118.0 1.63 -2.36 394 120.0 1.17 -2.45 399 122.0 1.55 -2.54 404 128.0 1.10 -1.61 409 129.1 1.03 -1.21 414 130.3 0.81 -1.07 419 131.4 1.13 -0.72 423 132.3 0.93 -1.14 429 133.7 1.12 -0.66 434 134.9 0.90 -0.50 439 136.0 1.00 -0.20 444 137.4 0.64 -0.99 449 138.9 0.98 -0.91 454 140.3 1.01 -0.77 459 141.7 1.14 -0.88 464 143.1 1.20 -0.85 469 144.6 0.99 -0.88 474 146.0 0.77 -1.10 479 148.0 1.05 -0.77 484 150.0 0.87 -0.66