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Westerhold, Thomas; Röhl, Ursula; Donner, Barbara; Frederichs, Thomas; Kordesch, Wendy E C; Bohaty, Steven M; Hodell, David A; Laskar, Jacques; Zeebe, Richard E (2017): Late Lutetian Thermal Maximum - crossing a thermal threshold in Earth's climate system? PANGAEA, https://doi.org/10.1594/PANGAEA.883619, Supplement to: Westerhold, T et al. (2018): Late Lutetian thermal maximum-crossing a thermal threshold in earth's climate system? Geochemistry, Geophysics, Geosystems, 19(1), 73-82, https://doi.org/10.1002/2017GC007240

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Abstract:
Recognizing and deciphering transient global warming events triggered by massive release of carbon into Earth's ocean-atmosphere climate system in the past are important for understanding climate under elevated pCO2 conditions. Here we present new high-resolution geochemical records including benthic foraminiferal stable isotope data with clear evidence of a short-lived (30 kyr) warming event at 41.52 Ma. The event occurs in the late Lutetian within magnetochron C19r and is characterized by a ~2°C warming of the deep ocean in the southern South Atlantic. The magnitudes of the carbon and oxygen isotope excursions of the Late Lutetian Thermal Maximum are comparable to the H2 event (53.6 Ma) suggesting a similar response of the climate system to carbon cycle perturbations even in an already relatively cooler climate several million years after the Early Eocene Climate Optimum. Coincidence of the event with exceptionally high insolation values in the Northern Hemisphere at 41.52 Ma might indicate that Earth's climate system has a thermal threshold. When this tipping point is crossed, rapid positive feedback mechanisms potentially trigger transient global warming. The orbital configuration in this case could have caused prolonged warm and dry season leading to a massive release of terrestrial carbon into the ocean-atmosphere system initiating environmental change.
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Coverage:
Median Latitude: -33.126324 * Median Longitude: -11.475976 * South-bound Latitude: -50.946000 * West-bound Longitude: -54.544200 * North-bound Latitude: 9.265667 * East-bound Longitude: 2.779567
Date/Time Start: 1987-04-13T15:45:00 * Date/Time End: 2003-04-05T00:00:00
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12 datasets

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Datasets listed in this publication series

  1. Westerhold, T; Röhl, U; Donner, B et al. (2017): (Table S1) X-ray fluorescence (XRF) scannings of ODP Hole 114-702B. https://doi.org/10.1594/PANGAEA.883616
  2. Westerhold, T; Röhl, U; Donner, B et al. (2017): (Table S10) Benthic foraminifera stable isotope data ODP Site 208-1263. https://doi.org/10.1594/PANGAEA.883627
  3. Westerhold, T; Röhl, U; Donner, B et al. (2017): (Table S11) Coulometry carbonate content of ODP Hole 114-702B and ODP Hole 208-1263A. https://doi.org/10.1594/PANGAEA.883628
  4. Westerhold, T; Röhl, U; Donner, B et al. (2017): (Table S12) Age model of ODP Hole 114-702B, Site 207-1260, and Site 208-1263. https://doi.org/10.1594/PANGAEA.883630
  5. Westerhold, T; Röhl, U; Donner, B et al. (2017): (Table S2) X-ray fluorescence (XRF) scannings of ODP Site 208-1263. https://doi.org/10.1594/PANGAEA.883617
  6. Westerhold, T; Röhl, U; Donner, B et al. (2017): (Table S3) X-ray fluorescence (XRF) scannings of ODP Site 208-1263 to calibrate FirstRun and SecondRun. https://doi.org/10.1594/PANGAEA.883618
  7. Westerhold, T; Röhl, U; Donner, B et al. (2017): (Table S4) Raw inclination, declination, and intensity measurements of ODP Site 208-1263. https://doi.org/10.1594/PANGAEA.883620
  8. Westerhold, T; Röhl, U; Donner, B et al. (2017): (Table S5) Paleomagnetic data for ODP Site 208-1263. https://doi.org/10.1594/PANGAEA.883621
  9. Westerhold, T; Röhl, U; Donner, B et al. (2017): (Table S6) Magnetostratigraphy for ODP Hole 114-702B, Hole 207-1260 and Site 208-1263. https://doi.org/10.1594/PANGAEA.883622
  10. Westerhold, T; Röhl, U; Donner, B et al. (2017): (Table S7) Bulk stable isotope data ODP Hole 114-702B. https://doi.org/10.1594/PANGAEA.883623
  11. Westerhold, T; Röhl, U; Donner, B et al. (2017): (Table S8) Bulk stable isotope data ODP Site 208-1263. https://doi.org/10.1594/PANGAEA.883624
  12. Westerhold, T; Röhl, U; Donner, B et al. (2017): (Table S9) Benthic and planktic foraminifera stable isotope data ODP Hole 114-702B. https://doi.org/10.1594/PANGAEA.883625