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Aridification signa...
Aridification signatures from fossil pollen indicate a drying climate in east-central Tibet during the late Eocene
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- Yuan, Qin (författare)
- Naturhistoriska riksmuseet,Enheten för paleobiologi
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- Barbolini, Natasha (författare)
- Stockholms universitet,Institutionen för ekologi, miljö och botanik,University of Amsterdam, The Netherlands,Stockholm University
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- Rydin, Catarina (författare)
- Stockholms universitet,Institutionen för ekologi, miljö och botanik,The Royal Swedish Academy of Sciences, Stockholm,Stockholm University
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- Gao, Dong-Lin (författare)
- Qinghai Institute of Salt Lakes, Chinese Academy of Sciences
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- Wei, Hai-Cheng (författare)
- Qinghai Institute of Salt Lakes, Chinese Academy of Sciences
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- Fan, Qi-Shun (författare)
- Qinghai Institute of Salt Lakes, Chinese Academy of Sciences
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- Qin, Zhan-Jie (författare)
- Qinghai Institute of Salt Lakes, Chinese Academy of Sciences
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- Du, Yong-Shen (författare)
- Qinghai Institute of Salt Lakes, Chinese Academy of Sciences
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- Shan, Jun-Jie (författare)
- Qinghai Institute of Salt Lakes, Chinese Academy of Sciences
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- Shan, Fa-Shou (författare)
- Qinghai Institute of Salt Lakes, Chinese Academy of Sciences
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- Vajda, Vivi (författare)
- Naturhistoriska riksmuseet,Enheten för paleobiologi,Department of Geology, Lund University, Sweden
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(creator_code:org_t)
- 2020-11-20
- 2020
- Engelska.
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Ingår i: Climate of the Past. - Vienna : European Geosciences Union (EGU). - 1744-9588 .- 1814-9332 .- 1814-9324. ; 16, s. 2255-2273
- Relaterad länk:
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https://doi.org/10.5...
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https://nrm.diva-por... (primary) (Raw object)
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https://su.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.5...
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Abstract
Ämnesord
Stäng
- Central Asia experienced a number of significant elevational and climatic changes during the Cenozoic, but much remains to be understood regarding the timing and driving mechanisms of these changes as well as their influence on ancient ecosystems. Here, we describe the palaeoecology and palaeoclimate of a new section from the Nangqian Basin in Tibet, north-western China, dated as Bartonian (41.2–37.8 Ma; late Eocene) based on our palynological analyses. Located on the east-central part of what is today the Tibetan Plateau, this section is excellently placed for better understanding the palaeoecological history of Tibet following the Indo-Asian collision. Our new palynological record reveals that a strongly seasonal steppe–desert ecosystem characterized by drought-tolerant shrubs, diverse ferns, and an underlying component of broad-leaved forests existed in east-central Tibet during the Eocene, influenced by a southern monsoon. A transient warming event, possibly the middle Eocene climatic optimum (MECO; 40 Ma), is reflected in our record by a temporary increase in regional tropical taxa and a concurrent decrease in steppe–desert vegetation. In the late Eocene, a drying signature in the palynological record is linked to proto-Paratethys Sea retreat, which caused widespread long-term aridification across the region. To better distinguish between local climatic variation and farther-reaching drivers of Central Asian palaeoclimate and elevation, we correlated key palynological sections across the Tibetan Plateau by means of established radioisotopic ages and biostratigraphy. This new palynozonation illustrates both intra- and inter-basinal floral response to Qinghai–Tibetan uplift and global climate change during the Paleogene, and it provides a framework for the age assignment of future palynological studies in Central Asia. Our work highlights the ongoing challenge of integrating various deep time records for the purpose of reconstructing palaeoelevation, indicating that a multi-proxy approach is vital for unravelling the complex uplift history of Tibet and its resulting influence on Asian climate.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Annan geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Other Earth and Related Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Multidisciplinär geovetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geosciences, Multidisciplinary (hsv//eng)
Nyckelord
- Palynology
- Palaeoclimate
- Tibet
- China
- aridification
- Eocene
- Diversity of life
- Livets mångfald
- The changing Earth
- Den föränderliga jorden
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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- Av författaren/redakt...
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Yuan, Qin
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Barbolini, Natas ...
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Rydin, Catarina
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Gao, Dong-Lin
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Wei, Hai-Cheng
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Fan, Qi-Shun
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visa fler...
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Qin, Zhan-Jie
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Du, Yong-Shen
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Shan, Jun-Jie
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Shan, Fa-Shou
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Vajda, Vivi
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- NATURVETENSKAP
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NATURVETENSKAP
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Climate of the P ...
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Naturhistoriska riksmuseet
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Stockholms universitet