D'haenens, Simon; Bornemann, André; Claeys, Philippe; Röhl, Ursula; Steurbaut, Etienne; Speijer, Robert P (2014): Auxiliary material and basic geochemical and benthic foraminiferal stable isotope data for the interval bracketing Eocene Thermal Maximum 2 (ETM2) at DSDP Sites 401 and 550 in the northeastern Atlantic Ocean. PANGAEA, https://doi.org/10.1594/PANGAEA.833010, Supplement to: D'haenens, S et al. (2014): A transient deep-sea circulation switch during Eocene Thermal Maximum 2. Paleoceanography, https://doi.org/10.1002/2013PA002567
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Ever since its discovery, Eocene Thermal Maximum 2 (ETM2; ~53.7 Ma) has been considered as one of the "little brothers" of the Paleocene-Eocene Thermal Maximum (PETM; ~56 Ma) as it displays similar characteristics including abrupt warming, ocean acidification, and biotic shifts. One of the remaining key questions is what effect these lesser climate perturbations had on ocean circulation and ventilation and, ultimately, biotic disruptions. Here we characterize ETM2 sections of the NE Atlantic (Deep Sea Drilling Project Sites 401 and 550) using multispecies benthic foraminiferal stable isotopes, grain size analysis, XRF core scanning, and carbonate content. The magnitude of the carbon isotope excursion (0.85-1.10 per mil) and bottom water warming (2-2.5°C) during ETM2 seems slightly smaller than in South Atlantic records. The comparison of the lateral d13C gradient between the North and South Atlantic reveals that a transient circulation switch took place during ETM2, a similar pattern as observed for the PETM. New grain size and published faunal data support this hypothesis by indicating a reduction in deepwater current velocity. Following ETM2, we record a distinct intensification of bottom water currents influencing Atlantic carbonate accumulation and biotic communities, while a dramatic and persistent clay reduction hints at a weakening of the regional hydrological cycle. Our findings highlight the similarities and differences between the PETM and ETM2. Moreover, the heterogeneity of hyperthermal expression emphasizes the need to specifically characterize each hyperthermal event and its background conditions to minimalize artifacts in global climate and carbonate burial models for the early Paleogene.
Median Latitude: 36.847259 * Median Longitude: -13.395567 * South-bound Latitude: -65.160667 * West-bound Longitude: -76.357750 * North-bound Latitude: 48.515200 * East-bound Longitude: 2.779567
Date/Time Start: 1976-06-06T00:00:00 * Date/Time End: 2003-04-05T00:00:00
Datasets listed in this publication series
- D'haenens, S; Bornemann, A; Claeys, P et al. (2014): Basic geochemical data of DSDP Site 80-550, from the latest Paleocene to the late Early Eocene, including PETM, ETM2 and ETM3. https://doi.org/10.1594/PANGAEA.832981
- D'haenens, S; Bornemann, A; Claeys, P et al. (2014): Benthic stable isotope data of DSDP Site 80-550, given per species (N. truempyi, O. umbonatus and Q. profunda). https://doi.org/10.1594/PANGAEA.832991
- D'haenens, S; Bornemann, A; Claeys, P et al. (2014): Median grain sizes and percentage of sortable silt of DSDP Site 80-550. https://doi.org/10.1594/PANGAEA.832982
- D'haenens, S; Bornemann, A; Claeys, P et al. (2014): X-ray fluorescence (XRF) core scanning data (light elements) of core 13 of DSDP Site 48-401. https://doi.org/10.1594/PANGAEA.832987
- D'haenens, S; Bornemann, A; Claeys, P et al. (2014): X-ray fluorescence (XRF) core scanning data (heavy elements) of core 13 of DSDP Site 48-401. https://doi.org/10.1594/PANGAEA.832988
- D'haenens, S; Bornemann, A; Claeys, P et al. (2014): Benthic stable isotope data of DSDP Site 48-401, given per species (N. truempyi and O. umbonatus). https://doi.org/10.1594/PANGAEA.832992
- D'haenens, S; Bornemann, A; Claeys, P et al. (2014): (Table S1) Average magnitude of carbon isotope excursions (CIEs) for several hyperthermals at DSDP Sites 48-401 and 80-550. https://doi.org/10.1594/PANGAEA.832997
- D'haenens, S; Bornemann, A; Claeys, P et al. (2014): (Table S2) Linear sedimentation rates preceding and following ETM2 in the Atlantic Ocean. https://doi.org/10.1594/PANGAEA.833008
- D'haenens, S; Bornemann, A; Claeys, P et al. (2014): (Table S3) Comparison of the magnitude of the CIEs of PETM, ETM2 and H2 in the Atlantic Ocean, based on the benthic foraminifer Nuttallides truempyi. https://doi.org/10.1594/PANGAEA.833009