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, Bowen; Spicer, Robert A.; Zhang, Kexin; Ji, Junliang; Farnsworth, Alexander; Hughes, Alice C.; Yang, Yibo; Han, Fang; Xu, Yadong; Spicer, Teresa; Shen, Tianyi; Lunt, Daniel J.; Shi, Gongle
通讯作者	Song, BW ; Zhang, KX (通讯作者)
发表日期	2020
ISSN	0012-821X
EISSN	1385-013X
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 similar to 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 degrees C) winters accompanied cool summers (similar to 23 +/- 2.9 degrees 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. (C) 2020 Elsevier B.V. All rights reserved.
关键词	CENOZOIC TECTONIC EVOLUTION STABLE-ISOTOPE GEOLOGIC EVOLUTION ASIAN MONSOONS PLATEAU CLIMATE ARIDIFICATION UPLIFT GROWTH SEDIMENTATION
英文关键词	Qaidam; Oligocene; physiognomy; general circulation climate model; paleoelevation; paleoclimate
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000525394700003
来源期刊	EARTH AND PLANETARY SCIENCE LETTERS
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260015
推荐引用方式 GB/T 7714	Song, Bowen,Spicer, Robert A.,Zhang, Kexin,et al. Qaidam Basin leaf fossils show northeastern Tibet was high, wet and cool in the early Oligocene[J]. 中国科学院青藏高原研究所,2020,537.
APA	Song, Bowen.,Spicer, Robert A..,Zhang, Kexin.,Ji, Junliang.,Farnsworth, Alexander.,...&Shi, Gongle.(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, Bowen,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).