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DOI	10.1016/j.revpalbo.2020.104226
	A major environmental shift by the middle Eocene in southern China: Evidence from palynological records
	Xie, Yulong; Wu, Fuli; Fang, Xiaomin
通讯作者	Wu, FL ; Fang, XM (通讯作者)
发表日期	2020
ISSN	0034-6667
EISSN	1879-0615
卷号	278
英文摘要	The modern environment of southern China is dominated by a humid monsoon climate, and presents a striking contrast to the widespread deserts found at similar latitudes elsewhere. The formation of a monsoon climate marks a major environmental shift in southern China during the Cenozoic; however, the origin and possible driving mechanism of the climate transition remain unclear. Paleogene palynological records from seven basins across southern China offer an exceptional opportunity to address this knowledge gap. The Paleogene palynoflora reveals two completely different vegetation and climate patterns: the Paleocene to early Eocene was characterized by a relatively high abundance of xerophilous taxa, suggesting an aridiserni-arid climate; while the middle Eocene to Oligocene supported subtropical wet evergreen and deciduous broad-leaved mixed forest, characterized by a significant increase in broad-leaved, coniferous taxa and the almost complete disappearance of xerophilous taxa, together indicating the emergence of a warm-humid climate at this time. Combined palynological, sedimentological, paleozoological, and paleobotanical proxy evidence reveal that the major environmental transition occurred roughly around the middle Eocene; this transition may mark the establishment of the monsoon climate. Furthermore, middle Eocene climatic parameters obtained through the Coexistence Approach (CA) were compared with those of modern sites with known climate regimes. The middle Eocene parameters were most similar to those exposed to the modem East Asian Monsoon (EAM), further indicating that the middle Eocene climate of southern China was predominantly influenced by the EAM. The evolution of the Paleogene palynoflora in southern China is largely consistent with global climate change. We infer that the enhancement of the East Asian winter monsoon (EAWM) during the middle Eocene was closely related to long-term global cooling, while the intensified East Asian summer monsoon (EASM) was primarily caused by the northward drift of the Indian Subcontinent and the uplift of the Tibetan Plateau. (C) 2020 Elsevier B.V. All rights reserved.
关键词	PONDAUNG FORMATION TIBETAN PLATEAU NANNING BASIN ASIAN CLIMATE MONSOON PREVALENCE OLIGOCENE CLIMATE GLOBAL MONSOON NANXIONG BASIN HAINAN ISLAND TARIM BASIN
英文关键词	Paleogene; Middle Eocene; Southern China; Palynoflora; East Asian monsoon; Environmental shift
语种	英语
WOS研究方向	Plant Sciences ; Paleontology
WOS类目	Plant Sciences ; Paleontology
WOS记录号	WOS:000533530400001
来源期刊	REVIEW OF PALAEOBOTANY AND PALYNOLOGY
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/259728
推荐引用方式 GB/T 7714	Xie, Yulong,Wu, Fuli,Fang, Xiaomin. A major environmental shift by the middle Eocene in southern China: Evidence from palynological records[J]. 中国科学院青藏高原研究所,2020,278.
APA	Xie, Yulong,Wu, Fuli,&Fang, Xiaomin.(2020).A major environmental shift by the middle Eocene in southern China: Evidence from palynological records.REVIEW OF PALAEOBOTANY AND PALYNOLOGY,278.
MLA	Xie, Yulong,et al."A major environmental shift by the middle Eocene in southern China: Evidence from palynological records".REVIEW OF PALAEOBOTANY AND PALYNOLOGY 278(2020).