globalchange  > 气候变化与战略
DOI: 10.1016/j.palaeo.2019.109504
论文题名:
Paleoclimatic fluctuations inferred from leaf wax n-alkane records in Central Tibet in the late Oligocene to early Miocene
作者: Cao M.; Sun J.; Liu W.; Hou J.; Tian Q.; Sun Z.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 310182
出版年: 2020
卷: 539
语种: 英语
英文关键词: Cenozoic ; Isotopes ; Lunpola Basin ; Paleoclimate ; Redness ; Spectral analysis
Scopus关键词: alkane ; atmospheric circulation ; Cenozoic ; lacustrine deposit ; Miocene ; Oligocene ; paleoclimate ; relative humidity ; spectral analysis ; wax ; China ; Lunpola Basin ; Qinghai-Xizang Plateau ; Xizang
英文摘要: Climatic variations and their forcing mechanisms in Tibet are highly significant for understanding the environmental effects of the Tibetan Plateau through its controlling on atmospheric circulation. Here we present new leaf wax n-alkanes from Cenozoic lacustrine sediments in the Lunpola Basin of central Tibet to constrain long-term paleoclimatic changes. Our results suggest that the paleoclimate from the late Oligocene to early Miocene was generally stable, but tending slightly towards cold-dry from 25.5 to 23.2 Ma, followed by a trend towards warm-humid between 23.2 and 21.7 Ma, and finally by a more arid and highly oscillating climate after 21.7 Ma. Our results compare favorably with the proxies of marine δ18O records, which suggests that the general long-term trend since the late Oligocene has been a response to global temperature variations. Moreover, spectral analysis of δ13C31 and δ2H31 data reveals that relative humidity exhibits ~400 kyr cycles, controlled mainly by periodic changes in global ice volumes. © 2019 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159785
Appears in Collections:气候变化与战略

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作者单位: Key Laboratory of Cenozoic Geology and Environment, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China; University of Chinese Academy of Science, Beijing, 100049, China; Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China; Faculty of Earth Sciences, China University of Geosciences, Wuhan, 430074, China; Yan an University, Yan'an, 716000, China

Recommended Citation:
Cao M.,Sun J.,Liu W.,et al. Paleoclimatic fluctuations inferred from leaf wax n-alkane records in Central Tibet in the late Oligocene to early Miocene[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2020-01-01,539
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