Wet tropical climate in SE Tibet during the Late Eocene
Abstract Cenozoic climate cooling at the advent of the Eocene-Oligocene transition (EOT), ~33.7 Ma ago, was stamped in the ocean by a series of climatic events albeit the impact of this global climatic transition on terrestrial environments is still fragmentary. Yet archival constraints on Late Eoce...
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oai:doaj.org-article:03bb2b1eb9014d14926bb7923c217e092021-12-02T15:05:51ZWet tropical climate in SE Tibet during the Late Eocene10.1038/s41598-017-07766-92045-2322https://doaj.org/article/03bb2b1eb9014d14926bb7923c217e092017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07766-9https://doaj.org/toc/2045-2322Abstract Cenozoic climate cooling at the advent of the Eocene-Oligocene transition (EOT), ~33.7 Ma ago, was stamped in the ocean by a series of climatic events albeit the impact of this global climatic transition on terrestrial environments is still fragmentary. Yet archival constraints on Late Eocene atmospheric circulation are scarce in (tropical) monsoonal Asia, and the paucity of terrestrial records hampers a meaningful comparison of the long-term climatic trends between oceanic and continental realms. Here we report new sedimentological data from the Jianchuan basin (SE Tibet) arguing for wetter climatic conditions in monsoonal Asia at ~35.5 Ma almost coevally to the aridification recognized northwards in the Xining basin. We show that the occurrence of flash-flood events in semi-arid to sub-humid palustrine-sublacustrine settings preceded the development of coal-bearing deposits in swampy-like environments, thus paving the way to a more humid climate in SE Tibet ahead from the EOT. We suggest that this moisture redistribution possibly reflects more northern and intensified ITCZ-induced tropical rainfall in monsoonal Asia around 35.5 Ma, in accordance with recent sea-surface temperature reconstructions from equatorial oceanic records. Our findings thus highlight an important period of climatic upheaval in terrestrial Asian environments ~2–4 millions years prior to the EOT.Philippe SorrelInes EymardPhilippe-Herve LeloupGweltaz MaheoNicolas OlivierMary SterbLoraine GourbetGuocan WangWu JingHaijian LuHaibing LiXu YadongKexin ZhangKai CaoMarie-Luce ChevalierAnne ReplumazNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017) |
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Medicine R Science Q Philippe Sorrel Ines Eymard Philippe-Herve Leloup Gweltaz Maheo Nicolas Olivier Mary Sterb Loraine Gourbet Guocan Wang Wu Jing Haijian Lu Haibing Li Xu Yadong Kexin Zhang Kai Cao Marie-Luce Chevalier Anne Replumaz Wet tropical climate in SE Tibet during the Late Eocene |
| description |
Abstract Cenozoic climate cooling at the advent of the Eocene-Oligocene transition (EOT), ~33.7 Ma ago, was stamped in the ocean by a series of climatic events albeit the impact of this global climatic transition on terrestrial environments is still fragmentary. Yet archival constraints on Late Eocene atmospheric circulation are scarce in (tropical) monsoonal Asia, and the paucity of terrestrial records hampers a meaningful comparison of the long-term climatic trends between oceanic and continental realms. Here we report new sedimentological data from the Jianchuan basin (SE Tibet) arguing for wetter climatic conditions in monsoonal Asia at ~35.5 Ma almost coevally to the aridification recognized northwards in the Xining basin. We show that the occurrence of flash-flood events in semi-arid to sub-humid palustrine-sublacustrine settings preceded the development of coal-bearing deposits in swampy-like environments, thus paving the way to a more humid climate in SE Tibet ahead from the EOT. We suggest that this moisture redistribution possibly reflects more northern and intensified ITCZ-induced tropical rainfall in monsoonal Asia around 35.5 Ma, in accordance with recent sea-surface temperature reconstructions from equatorial oceanic records. Our findings thus highlight an important period of climatic upheaval in terrestrial Asian environments ~2–4 millions years prior to the EOT. |
| format |
article |
| author |
Philippe Sorrel Ines Eymard Philippe-Herve Leloup Gweltaz Maheo Nicolas Olivier Mary Sterb Loraine Gourbet Guocan Wang Wu Jing Haijian Lu Haibing Li Xu Yadong Kexin Zhang Kai Cao Marie-Luce Chevalier Anne Replumaz |
| author_facet |
Philippe Sorrel Ines Eymard Philippe-Herve Leloup Gweltaz Maheo Nicolas Olivier Mary Sterb Loraine Gourbet Guocan Wang Wu Jing Haijian Lu Haibing Li Xu Yadong Kexin Zhang Kai Cao Marie-Luce Chevalier Anne Replumaz |
| author_sort |
Philippe Sorrel |
| title |
Wet tropical climate in SE Tibet during the Late Eocene |
| title_short |
Wet tropical climate in SE Tibet during the Late Eocene |
| title_full |
Wet tropical climate in SE Tibet during the Late Eocene |
| title_fullStr |
Wet tropical climate in SE Tibet during the Late Eocene |
| title_full_unstemmed |
Wet tropical climate in SE Tibet during the Late Eocene |
| title_sort |
wet tropical climate in se tibet during the late eocene |
| publisher |
Nature Portfolio |
| publishDate |
2017 |
| url |
https://doaj.org/article/03bb2b1eb9014d14926bb7923c217e09 |
| work_keys_str_mv |
AT philippesorrel wettropicalclimateinsetibetduringthelateeocene AT ineseymard wettropicalclimateinsetibetduringthelateeocene AT philippeherveleloup wettropicalclimateinsetibetduringthelateeocene AT gweltazmaheo wettropicalclimateinsetibetduringthelateeocene AT nicolasolivier wettropicalclimateinsetibetduringthelateeocene AT marysterb wettropicalclimateinsetibetduringthelateeocene AT lorainegourbet wettropicalclimateinsetibetduringthelateeocene AT guocanwang wettropicalclimateinsetibetduringthelateeocene AT wujing wettropicalclimateinsetibetduringthelateeocene AT haijianlu wettropicalclimateinsetibetduringthelateeocene AT haibingli wettropicalclimateinsetibetduringthelateeocene AT xuyadong wettropicalclimateinsetibetduringthelateeocene AT kexinzhang wettropicalclimateinsetibetduringthelateeocene AT kaicao wettropicalclimateinsetibetduringthelateeocene AT marielucechevalier wettropicalclimateinsetibetduringthelateeocene AT annereplumaz wettropicalclimateinsetibetduringthelateeocene |
| _version_ |
1718388622124646400 |