A transient deep-sea circulation switch during Eocene Thermal Maximum 2
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...
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ftvliz:oai:oma.vliz.be:247011 2023-05-15T17:51:41+02:00 A transient deep-sea circulation switch during Eocene Thermal Maximum 2 D'haenens, S. Bornemann, A Claeys, P. Rohl, U Steurbaut, E. Speijer, R.P. 2014 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=247011 en eng info:eu-repo/semantics/altIdentifier/wos/000337559000003 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1002/2013PA002567 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=247011 info:eu-repo/semantics/restrictedAccess %3Ci%3EPaleoceanography+29%285%29%3C%2Fi%3E%3A+370-388.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1002%2F2013PA002567%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1002%2F2013PA002567%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2014 ftvliz https://doi.org/10.1002/2013PA002567 2022-05-01T10:26:58Z 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‰) and bottom water warming (2–2.5°C) during ETM2 seems slightly smaller than in South Atlantic records. The comparison of the lateral d 13 C 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. Article in Journal/Newspaper Ocean acidification Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Paleoceanography 29 5 370 388 |
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Open Polar |
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Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
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ftvliz |
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English |
description |
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‰) and bottom water warming (2–2.5°C) during ETM2 seems slightly smaller than in South Atlantic records. The comparison of the lateral d 13 C 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. |
format |
Article in Journal/Newspaper |
author |
D'haenens, S. Bornemann, A Claeys, P. Rohl, U Steurbaut, E. Speijer, R.P. |
spellingShingle |
D'haenens, S. Bornemann, A Claeys, P. Rohl, U Steurbaut, E. Speijer, R.P. A transient deep-sea circulation switch during Eocene Thermal Maximum 2 |
author_facet |
D'haenens, S. Bornemann, A Claeys, P. Rohl, U Steurbaut, E. Speijer, R.P. |
author_sort |
D'haenens, S. |
title |
A transient deep-sea circulation switch during Eocene Thermal Maximum 2 |
title_short |
A transient deep-sea circulation switch during Eocene Thermal Maximum 2 |
title_full |
A transient deep-sea circulation switch during Eocene Thermal Maximum 2 |
title_fullStr |
A transient deep-sea circulation switch during Eocene Thermal Maximum 2 |
title_full_unstemmed |
A transient deep-sea circulation switch during Eocene Thermal Maximum 2 |
title_sort |
transient deep-sea circulation switch during eocene thermal maximum 2 |
publishDate |
2014 |
url |
http://www.vliz.be/nl/open-marien-archief?module=ref&refid=247011 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
%3Ci%3EPaleoceanography+29%285%29%3C%2Fi%3E%3A+370-388.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1002%2F2013PA002567%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1002%2F2013PA002567%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000337559000003 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1002/2013PA002567 http://www.vliz.be/nl/open-marien-archief?module=ref&refid=247011 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1002/2013PA002567 |
container_title |
Paleoceanography |
container_volume |
29 |
container_issue |
5 |
container_start_page |
370 |
op_container_end_page |
388 |
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1766158914388230144 |