气候变化领域集成服务门户(CCPortal): Qaidam Basin leaf fossils show northeastern Tibet was high, wet and cool in the early Oligocene

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DOI	10.1016/j.epsl.2020.116175
	Qaidam Basin leaf fossils show northeastern Tibet was high, wet and cool in the early Oligocene
	Song B.; Spicer R.A.; Zhang K.; Ji J.; Farnsworth A.; Hughes A.C.; Yang Y.; Han F.; Xu Y.; Spicer T.; Shen T.; Lunt D.J.; Shi G.
发表日期	2020
ISSN	0012821X
卷号	537
英文摘要	The Paleogene environment of today's semi-arid and arid Central Asia is poorly quantified and knowledge of the paleoelevation of northern Tibet remains elusive, yet both are crucially important for understanding inter-relationships between growth of the Tibetan Plateau and Asian monsoon development. Here, we apply the Climate-Leaf Analysis Multivariate Program (CLAMP) and moist enthalpy method to the newly discovered early Oligocene (30.8 Ma) fossil leaves from the Qaidam Basin, to reconstruct quantitatively the paleoclimate and paleoelevation of this critical part of northern Tibet. We find the Qaidam Basin floor vegetation was likely at ∼3.3 ± 1.4 km in the early Oligocene, similar to that of the present basin floor but higher than the rising Himalaya at that time, and experienced a temperate, moderately wet climate. Near-freezing (1.4 ± 3.5 °C) winters accompanied cool summers (∼23 ± 2.9 °C). Annual precipitation likely exceeded 1000 mm (growing season precipitation of 1229 ± 643 mm) with subdued (non-monsoonal) seasonality in which summers were drier than winters. This finding challenges geodynamic models that envisage a Miocene or later uplift of northern Tibet and progressive uplift from the south. © 2020 Elsevier B.V.
关键词	general circulation climate model Oligocene paleoclimate paleoelevation physiognomy Qaidam
英文关键词	Floors; Multivariant analysis; General circulation; Oligocene; Paleoclimates; Paleoelevation; physiognomy; Qaidam; Climate models; atmospheric general circulation model; climate modeling; fossil record; leaf; monsoon; Oligocene; paleoclimate; China; Qaidam Basin; Qinghai; Qinghai-Xizang Plateau
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202897
作者单位	Institute of Geological Survey, China University of Geosciences, Wuhan, 430074, China; State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China; CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla, 666303, China; School of Environment, Earth and Ecosystem Sciences, The Open University, Milton Keynes, MK7 6AA, United Kingdom; School of Geographical Sciences, University of Bristol, Bristol, BS8 1SS, United Kingdom; Key Laboratory of Continental Collision and Plateau Uplift, Institute of Tibetan Plateau Research, CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, 100101, China; School of Earth Sciences, East China University of Technology, Nanchang, 330013, China; School of Earth Sciences, China University of Geosciences, Wuhan, 430074, China; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and P...
推荐引用方式 GB/T 7714	Song B.,Spicer R.A.,Zhang K.,et al. Qaidam Basin leaf fossils show northeastern Tibet was high, wet and cool in the early Oligocene[J],2020,537.
APA	Song B..,Spicer R.A..,Zhang K..,Ji J..,Farnsworth A..,...&Shi G..(2020).Qaidam Basin leaf fossils show northeastern Tibet was high, wet and cool in the early Oligocene.Earth and Planetary Science Letters,537.
MLA	Song B.,et al."Qaidam Basin leaf fossils show northeastern Tibet was high, wet and cool in the early Oligocene".Earth and Planetary Science Letters 537(2020).