Seki, Osamu; Foster, Gavin L; Schmidt, Daniela N; Mackensen, Andreas; Kawamura, Kimitaka; Pancost, Richard D (2010): Alkenone and boron based Oligocene pCO2 records. doi:10.1594/PANGAEA.732923, Supplement to: Seki, O et al. (2010): Alkenone and boron based Pliocene pCO2 records. Earth and Planetary Science Letters, 292(1-2), 201-211, doi:10.1016/j.epsl.2010.01.037
Always quote above citation when using data! You can download the citation in several formats below.
The Pliocene period is the most recent time when the Earth was globally significantly (~3°C) warmer than today. However, the existing pCO2 data for the Pliocene are sparse and there is little agreement between the various techniques used to reconstruct palaeo-pCO2. Moreover, the temporal resolution of the published records does not allow a robust assessment of the role of declining pCO2 in the intensification of the Northern Hemisphere Glaciation (INHG) and a direct comparison to other proxy records are lacking. For the first time, we use a combination of foraminiferal (delta11B) and organic biomarker (alkenone-derived carbon isotopes) proxies to determine the concentration of atmospheric CO2 over the past 5 Ma. Both proxy records show that during the warm Pliocene pCO2 was between 330 and 400 ppm, i.e. similar to today. The decrease to values similar to pre-industrial times (275-285 ppm) occurred between 3.2 Ma and 2.8 Ma - coincident with the INHG and affirming the link between global climate, the cryosphere and pCO2.
Median Latitude: 8.935197 * Median Longitude: -68.291053 * South-bound Latitude: 3.719100 * West-bound Longitude: -86.444500 * North-bound Latitude: 12.744000 * East-bound Longitude: -42.908100
Date/Time Start: 1994-02-13T16:45:00 * Date/Time End: 2002-05-22T19:20:00
154-925E * Latitude: 4.204280 * Longitude: -43.488900 * Date/Time Start: 1994-02-13T16:45:00 * Date/Time End: 1994-02-14T04:00:00 * Elevation: -3053.0 m * Penetration: 54.5 m * Recovery: 55.65 m * Location: North Atlantic Ocean * Campaign: Leg154 * Basis: Joides Resolution * Device: Drilling/drill rig (DRILL) * Comment: 6 cores; 54.5 m cored; 0 m drilled; 102.1 % recovery
154-926A * Latitude: 3.719100 * Longitude: -42.908100 * Date/Time Start: 1994-02-19T11:30:00 * Date/Time End: 1994-02-21T10:30:00 * Elevation: -3610.0 m * Penetration: 327 m * Recovery: 334.92 m * Location: North Atlantic Ocean * Campaign: Leg154 * Basis: Joides Resolution * Device: Drilling/drill rig (DRILL) * Comment: 35 cores; 327 m cored; 0 m drilled; 102.4 % recovery
154-927B * Latitude: 5.462900 * Longitude: -44.480600 * Date/Time Start: 1994-03-01T15:54:00 * Date/Time End: 1994-03-03T15:00:00 * Elevation: -3327.0 m * Penetration: 261.5 m * Recovery: 267.53 m * Location: North Atlantic Ocean * Campaign: Leg154 * Basis: Joides Resolution * Device: Drilling/drill rig (DRILL) * Comment: 28 cores; 261.5 m cored; 0 m drilled; 102.3 % recovery