Paleocene-Eocene Thermal Maximum Isotope and Mg/Ca Data ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: PLEASE CITE CONTRIBUTORS WHEN USING THIS DATA!!!!! NAME OF DATA SET: Paleocene-Eocene Thermal Maximum Isotope and Mg/Ca Data LAST UPDATE: 8/2005 (Original receipt by WDC Paleo) CONTRIBUTOR: Aradhna Tripati, University of Cambridge IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2005-058 SUGGESTED DATA CITATION: Tripati, A. et al. 2005. Paleocene-Eocene Thermal Maximum Isotope and Mg/Ca Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2005-058. NOAA/NGDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Tripati, A. and H. Elderfield. 2005. Deep-Sea Temperature and Circulation Changes at the Paleocene-Eocene Thermal Maximum. Science, Vol. 308, pp. 1894, 24 June 2005. ABSTRACT: A rapid increase in greenhouse gas levels is thought to have fueled global warming at the Paleocene-Eocene Thermal Maximum (PETM). Foraminiferal magnesium/calcium ratios indicate that bottom waters warmed by 4 to 5C, similar to tropical and subtropical surface ocean waters, implying no amplification of warming in high-latitude regions of deep-water formation under ice-free conditions. Intermediate waters warmed before the carbon isotope excursion, in association with downwelling in the North Pacific and reduced Southern Ocean convection, supporting changing circulation as the trigger for methane hydrate release. A switch to deep convection in the North Pacific at the PETM onset could have amplified and sustained warming. GEOGRAPHIC REGION: Global PERIOD OF RECORD: 55 MMYrBP DESCRIPTION: Oxygen isotope and Mg/Ca ratios from benthic foraminifera at the Paleocene- Eocene boundary for 3 ODP sites in the Tropical Oceans. Core locations: ODP1209B (tropical N. Pacific) 32 deg. 39.10'N 158 deg 30.4'E Water depth 2387 m. DSDP527 (subtropical S. Atlantic) 28 deg. 2'S 1 deg 46' E Water depth 4428 m. ODP865 (equatorial Pacific) 18 deg. 26'S 17 deg 33' W Water depth 1530 m. DATA: 1. Benthic foraminiferal stable isotope data for Hole 1209B Depth d18O d13C mcd permilPDB per mil PDB 210.72 0.34 0.49 210.76 0.29 0.52 210.8 0.33 0.57 210.84 0.18 0.33 210.88 0.27 0.39 210.92 0.16 0.2 210.96 0.24 0.25 211 0.09 0.1 211.02 0.08 -0.06 211.04 0.1 0.01 211.08 0 0.06 211.12 -0.02 -0.18 211.14 0.03 -0.13 211.16 0.05 -0.13 211.18 0.13 0.15 211.22 -0.18 -0.12 211.24 0.07 0.4 211.26 0.5 0.78 211.28 0.37 1.07 211.3 0.44 1.32 211.32 0.39 1.07 211.34 0.15 0.95 211.36 0.4 1.1 211.4 0.44 1.36 2. Benthic foraminiferal Mg/Ca ratios for Hole 1209B analysed in February 2004 Depth Age Mg/Ca mcd MMYrBP mmol/mol 210.72 55.266 2.417 210.72 55.266 2.73 210.72 55.266 2.442 210.76 55.28 2.582 210.76 55.28 2.788 210.76 55.28 2.681 210.8 55.294 2.961 210.8 55.294 2.937 210.8 55.294 2.491 210.8 55.294 2.516 210.84 55.308 2.475 210.84 55.308 2.549 210.84 55.308 3.019 210.84 55.308 2.895 210.88 55.322 2.368 210.88 55.322 3.267 210.88 55.322 2.541 210.92 55.337 2.574 210.92 55.337 3.085 210.92 55.337 2.533 210.96 55.351 3.069 210.96 55.351 2.896 210.96 55.351 2.772 211.02 55.372 3.127 211.02 55.372 2.846 211 55.365 2.813 211.02 55.372 3.44 211.02 55.372 2.962 211.02 55.372 2.888 211.02 55.372 3.053 211.04 55.379 2.912 211.04 55.379 3.168 211.04 55.379 3.209 211.04 55.379 3.407 211.08 55.393 2.937 211.08 55.393 3.424 211.08 55.393 3.259 211.08 55.393 2.814 211.12 55.408 2.921 211.12 55.408 3.292 211.12 55.408 3.045 211.16 55.422 2.904 211.16 55.422 3.144 211.18 55.429 3.053 211.18 55.429 3.127 211.18 55.429 3.135 211.22 55.443 2.789 211.22 55.443 3.234 211.22 55.443 2.905 211.28 55.55 2.765 211.28 55.55 2.344 211.28 55.55 2.452 211.28 55.55 2.509 211.28 55.55 2.542 211.3 55.6 2.658 211.3 55.6 2.518 211.3 55.6 2.394 211.32 55.65 2.609 211.32 55.65 2.46 211.32 55.65 2.403 211.34 55.7 2.609 211.34 55.7 2.411 211.34 55.7 2.386 211.36 55.75 2.42 211.36 55.75 2.609 211.36 55.75 2.576 211.4 55.85 2.42 211.4 55.85 2.585 3. Benthic foraminiferal Mg/Ca ratios for Site 527 analysed in February 2004 Depth Age Mg/Ca mbsf MMYrBP mmol/mol. 199.85 55.26 2.727 199.85 55.26 2.267 200.02 55.273 2.348 200.36 55.346 2.726 200.36 55.346 2.473 200.55 55.394 3.465 200.55 55.394 3.158 201.18 55.516 2.406 201.18 55.516 2.298 201.18 55.516 2.37 201.38 55.548 2.216 201.38 55.548 2.316 201.38 55.548 2.388 201.38 55.548 2.442 201.65 55.592 2.143 201.65 55.592 2.107 201.65 55.592 2.215 4. Benthic foraminiferal Mg/Ca ratios for Hole 865C analysed in February 2004 Depth Age Mg/Ca mcd MMYrBP mmol/mol 101.7 55.187 3.766 101.7 55.187 3.293 101.9 55.233 3.558 101.9 55.233 3.363 102 55.257 3.962 102 55.257 3.962 102 55.257 3.586 102.1 55.28 3.419 102.1 55.28 3.321 102.2 55.301 4.018 102.2 55.301 3.46 102.2 55.301 3.126 102.26 55.314 3.224 102.26 55.314 3.809 102.26 55.314 3.753 102.4 55.344 3.252 102.4 55.344 3.865 102.51 55.367 3.224 102.51 55.367 3.893 102.6 55.386 3.335 102.6 55.386 3.935 102.72 55.412 3.586 102.72 55.412 4.172 102.72 55.412 3.991 102.75 55.418 4.897 102.83 55.435 5.05 102.83 55.435 4.799 102.83 55.435 4.771 102.83 55.435 5.287 102.9 55.45 4.256 102.9 55.45 4.799 102.9 55.45 4.339 102.9 55.45 4.116 102.9 55.45 4.66 102.96 55.48 4.576 102.96 55.48 3.977 102.96 55.48 4.813 103.02 55.51 4.451 103.02 55.51 3.573 103.02 55.51 4.019 103.11 55.555 3.336 103.11 55.555 3.197 103.11 55.555 3.671 103.2 55.6 3.699 103.2 55.6 3.113 103.31 55.655 3.532 103.31 55.655 3.365 103.4 55.7 3.253 103.4 55.7 3.142 103.5 55.75 3.56 103.5 55.75 3.281