Bowen, Gabriel J; Maibauer, Bianca J; Kraus, Mary J; Röhl, Ursula; Westerhold, Thomas; Steimke, Amy; Gingerich, Philip D; Wing, Scott L; Clyde, William C (2014): Color data, carbon and oxygen isotopes, and offsets from BBCP Polecat Bench cores 2A and 2B. PANGAEA, https://doi.org/10.1594/PANGAEA.817119, Supplement to: Bowen, GJ et al. (2014): Two massive, rapid releases of carbon during the onset of the Palaeocene–Eocene thermal maximum. Nature Geoscience, https://doi.org/10.1038/NGEO2316
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The Earth's climate abruptly warmed by 5-8 °C during the Palaeocene-Eocene thermal maximum (PETM), about 55.5 million years ago**1,2. This warming was associated with a massive addition of carbon to the ocean-atmosphere system, but estimates of the Earth systemresponse to this perturbation are complicated by widely varying estimates of the duration of carbon release, which range from less than a year to tens of thousands of years. In addition the source of the carbon, and whether it was released as a single injection or in several pulses, remains the subject of debate**2-4. Here we present a new high-resolution carbon isotope record from terrestrial deposits in the Bighorn Basin (Wyoming, USA) spanning the PETM, and interpret the record using a carbon-cycle boxmodel of the ocean-atmosphere-biosphere system.Our record shows that the beginning of the PETMis characterized by not one but two distinct carbon release events, separated by a recovery to background values. To reproduce this pattern, our model requires two discrete pulses of carbon released directly to the atmosphere, at average rates exceeding 0.9 Pg C yr**-1, with the first pulse lasting fewer than 2,000 years.
Median Latitude: 44.768860 * Median Longitude: -108.887922 * South-bound Latitude: 44.768850 * West-bound Longitude: -108.887960 * North-bound Latitude: 44.768870 * East-bound Longitude: -108.887890
Date/Time Start: 2011-07-19T07:45:00 * Date/Time End: 2011-07-23T22:46:00
Datasets listed in this publication series
- Bowen, GJ; Maibauer, BJ; Kraus, MJ et al. (2014): (Table S1) Offsets between drilling depths (meters below surface, MBS) of Polecat Bench cores A and B used to develop the composite depth scale (meters composite depth, MCD). https://doi.org/10.1594/PANGAEA.839809
- Bowen, GJ; Maibauer, BJ; Kraus, MJ et al. (2014): (Table S2) Tie points used to correlate outcrop levels to BBCP cores. https://doi.org/10.1594/PANGAEA.817098
- Bowen, GJ; Maibauer, BJ; Kraus, MJ et al. (2014): (Table S3) Carbon isotope values of diffuse micritic carbonate and associated nodules. https://doi.org/10.1594/PANGAEA.839819
- Bowen, GJ; Maibauer, BJ; Kraus, MJ et al. (2014): (Table S4) Carbon and oxygen isotope values for pedogenic carbonate samples collected from Polecat Bench cores A and B organized by stratigraphic level. https://doi.org/10.1594/PANGAEA.817091
- Bowen, GJ; Maibauer, BJ; Kraus, MJ et al. (2014): (Table S5) Time model specification for models assuming a 90 kyr duration of the PETM CIE body. https://doi.org/10.1594/PANGAEA.839861
- Bowen, GJ; Maibauer, BJ; Kraus, MJ et al. (2014): (Table S6) Time model specification for models assuming a 135 kyr duration of the PETM CIE body. https://doi.org/10.1594/PANGAEA.839864
- Bowen, GJ; Maibauer, BJ; Kraus, MJ et al. (2014): Color data from BBCP Polecat Bench core 2A. https://doi.org/10.1594/PANGAEA.817099
- Bowen, GJ; Maibauer, BJ; Kraus, MJ et al. (2014): Color data from BBCP Polecat Bench core 2B. https://doi.org/10.1594/PANGAEA.817118