Step-wise change of Asian interior climate preceding the Eocene-Oligocene Transition (EOT)
International audience Understanding the global climate change from greenhouse to icehouse conditions at the EoceneOligocene Transition (EOT) 34 million years ago requires climatic records from oceanic as well as continental realms of the key Late Eocene "doubthouse" period preceding this...
Published in: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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Main Authors: | , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2011
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Subjects: | |
Online Access: | https://insu.hal.science/insu-00605331 https://doi.org/10.1016/j.palaeo.2010.11.028 |
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ftinsu:oai:HAL:insu-00605331v1 |
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Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
Late Eocene Doubthouse climate EoceneOligocene Transition (EOT) Terrestrial record Gypsum Red beds Cyclostratigraphy [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
Late Eocene Doubthouse climate EoceneOligocene Transition (EOT) Terrestrial record Gypsum Red beds Cyclostratigraphy [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDE.MCG]Environmental Sciences/Global Changes Abels, Hemmo, A. Dupont-Nivet, Guillaume Xiao, Guoqiao Bosboom, Roderic Krijgsman, Wout Step-wise change of Asian interior climate preceding the Eocene-Oligocene Transition (EOT) |
topic_facet |
Late Eocene Doubthouse climate EoceneOligocene Transition (EOT) Terrestrial record Gypsum Red beds Cyclostratigraphy [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience Understanding the global climate change from greenhouse to icehouse conditions at the EoceneOligocene Transition (EOT) 34 million years ago requires climatic records from oceanic as well as continental realms of the key Late Eocene "doubthouse" period preceding this switch. Here, we report integrated stratigraphic results from well-dated Late Eocene continental mudflat to saline lake paleoenvironments of the Xining Basin (northeastern Tibetan Plateau, western China) recording regional and global change. Cyclostratigraphic analysis strongly suggests continuous dominance of the 41-kyr obliquity cycle in the whole late Eocene interval down to the base of polarity chron C18n.2n at 39 Ma with additional input of the ~100-kyr eccentricity cycle up to the base of chron C13r at ~34.7 Ma. This might imply that high-latitude climates dominated the area long before the EOT, probably related to incipient ice-volume fluctuations. Furthermore, our results reveal two paleoenvironmental deterioration steps preceding the EoceneOligocene Transition. The first step occurs in the top of chron C17n.1n at ~36.6 Ma. This age closely corresponds to (1) the high altitude pollen appearance in chron C16.2r at ~36.4 Ma in the same section, (2) the recently dated final retreat of the Tarim Sea in western China, and (3) a shift from precession to obliquity dominance in the Atlantic Ocean. This near co-occurrence suggests global change at this time. We hypothesize this change is related to an increase in incipient ice sheet volume leading to passing threshold conditions for the high-altitude pollen appearance and Tarim Sea retreat, finally leading to decreased moisture availability in the Xining Basin. At the second step, in the base of chron C13r at ~34.7 Ma, a substantial increase in clastic sedimentation rates is observed. This might relate to increased climate variability preceding the greenhouse to icehouse transition at the EOT that prevented landscapes to attain equilibrium configurations. |
author2 |
Paleomagnetic Laboratory ‘Fort Hoofddijk', Utrecht University, Faculty of Geosciences Universiteit Utrecht / Utrecht University Utrecht Géosciences Rennes (GR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) Key Laboratory of Biogeology and Environmental Geology China University of Geosciences Wuhan (CUG) |
format |
Article in Journal/Newspaper |
author |
Abels, Hemmo, A. Dupont-Nivet, Guillaume Xiao, Guoqiao Bosboom, Roderic Krijgsman, Wout |
author_facet |
Abels, Hemmo, A. Dupont-Nivet, Guillaume Xiao, Guoqiao Bosboom, Roderic Krijgsman, Wout |
author_sort |
Abels, Hemmo, A. |
title |
Step-wise change of Asian interior climate preceding the Eocene-Oligocene Transition (EOT) |
title_short |
Step-wise change of Asian interior climate preceding the Eocene-Oligocene Transition (EOT) |
title_full |
Step-wise change of Asian interior climate preceding the Eocene-Oligocene Transition (EOT) |
title_fullStr |
Step-wise change of Asian interior climate preceding the Eocene-Oligocene Transition (EOT) |
title_full_unstemmed |
Step-wise change of Asian interior climate preceding the Eocene-Oligocene Transition (EOT) |
title_sort |
step-wise change of asian interior climate preceding the eocene-oligocene transition (eot) |
publisher |
HAL CCSD |
publishDate |
2011 |
url |
https://insu.hal.science/insu-00605331 https://doi.org/10.1016/j.palaeo.2010.11.028 |
long_lat |
ENVELOPE(-111.528,-111.528,57.081,57.081) |
geographic |
Saline Lake |
geographic_facet |
Saline Lake |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
ISSN: 0031-0182 EISSN: 1872-616X Palaeogeography, Palaeoclimatology, Palaeoecology https://insu.hal.science/insu-00605331 Palaeogeography, Palaeoclimatology, Palaeoecology, 2011, 299 (3-4), pp.399-412. ⟨10.1016/j.palaeo.2010.11.028⟩ |
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info:eu-repo/semantics/altIdentifier/doi/10.1016/j.palaeo.2010.11.028 insu-00605331 https://insu.hal.science/insu-00605331 doi:10.1016/j.palaeo.2010.11.028 |
op_doi |
https://doi.org/10.1016/j.palaeo.2010.11.028 |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
299 |
container_issue |
3-4 |
container_start_page |
399 |
op_container_end_page |
412 |
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spelling |
ftinsu:oai:HAL:insu-00605331v1 2024-02-11T10:04:55+01:00 Step-wise change of Asian interior climate preceding the Eocene-Oligocene Transition (EOT) Abels, Hemmo, A. Dupont-Nivet, Guillaume Xiao, Guoqiao Bosboom, Roderic Krijgsman, Wout Paleomagnetic Laboratory ‘Fort Hoofddijk', Utrecht University, Faculty of Geosciences Universiteit Utrecht / Utrecht University Utrecht Géosciences Rennes (GR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR) Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS) Key Laboratory of Biogeology and Environmental Geology China University of Geosciences Wuhan (CUG) 2011 https://insu.hal.science/insu-00605331 https://doi.org/10.1016/j.palaeo.2010.11.028 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/j.palaeo.2010.11.028 insu-00605331 https://insu.hal.science/insu-00605331 doi:10.1016/j.palaeo.2010.11.028 ISSN: 0031-0182 EISSN: 1872-616X Palaeogeography, Palaeoclimatology, Palaeoecology https://insu.hal.science/insu-00605331 Palaeogeography, Palaeoclimatology, Palaeoecology, 2011, 299 (3-4), pp.399-412. ⟨10.1016/j.palaeo.2010.11.028⟩ Late Eocene Doubthouse climate EoceneOligocene Transition (EOT) Terrestrial record Gypsum Red beds Cyclostratigraphy [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2011 ftinsu https://doi.org/10.1016/j.palaeo.2010.11.028 2024-01-24T17:24:02Z International audience Understanding the global climate change from greenhouse to icehouse conditions at the EoceneOligocene Transition (EOT) 34 million years ago requires climatic records from oceanic as well as continental realms of the key Late Eocene "doubthouse" period preceding this switch. Here, we report integrated stratigraphic results from well-dated Late Eocene continental mudflat to saline lake paleoenvironments of the Xining Basin (northeastern Tibetan Plateau, western China) recording regional and global change. Cyclostratigraphic analysis strongly suggests continuous dominance of the 41-kyr obliquity cycle in the whole late Eocene interval down to the base of polarity chron C18n.2n at 39 Ma with additional input of the ~100-kyr eccentricity cycle up to the base of chron C13r at ~34.7 Ma. This might imply that high-latitude climates dominated the area long before the EOT, probably related to incipient ice-volume fluctuations. Furthermore, our results reveal two paleoenvironmental deterioration steps preceding the EoceneOligocene Transition. The first step occurs in the top of chron C17n.1n at ~36.6 Ma. This age closely corresponds to (1) the high altitude pollen appearance in chron C16.2r at ~36.4 Ma in the same section, (2) the recently dated final retreat of the Tarim Sea in western China, and (3) a shift from precession to obliquity dominance in the Atlantic Ocean. This near co-occurrence suggests global change at this time. We hypothesize this change is related to an increase in incipient ice sheet volume leading to passing threshold conditions for the high-altitude pollen appearance and Tarim Sea retreat, finally leading to decreased moisture availability in the Xining Basin. At the second step, in the base of chron C13r at ~34.7 Ma, a substantial increase in clastic sedimentation rates is observed. This might relate to increased climate variability preceding the greenhouse to icehouse transition at the EOT that prevented landscapes to attain equilibrium configurations. Article in Journal/Newspaper Ice Sheet Institut national des sciences de l'Univers: HAL-INSU Saline Lake ENVELOPE(-111.528,-111.528,57.081,57.081) Palaeogeography, Palaeoclimatology, Palaeoecology 299 3-4 399 412 |