气候变化领域集成服务门户(CCPortal): Trends and Transitions in Silicate Weathering in the Asian Interior (NE Tibet) Since 53 Ma

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DOI	10.3389/feart.2022.824404
	Trends and Transitions in Silicate Weathering in the Asian Interior (NE Tibet) Since 53 Ma
	Yang, Yibo; Han, Wenxia; Ye, Chengcheng; Galy, Albert; Fang, Xiaomin
通讯作者	Yang, YB (通讯作者)
发表日期	2022
EISSN	2296-6463
卷号	10
英文摘要	The relationship between silicate weathering, Tibetan Plateau uplift, and global cooling during the Cenozoic provides a valuable case study for understanding the interaction of tectonics and climate. The Tibetan Plateau uplift is considered to have caused Cenozoic cooling via the atmospheric CO2 drawdown by increased silicate weathering. However, this hypothesis has been intensively debated over the past few decades due to the lack of complete silicate weathering records from the continental interior, which can directly track the effects of uplift on weathering. We provide the first complete long (past 53 Myr) continental silicate weathering record from the NE Tibetan Plateau, combined with a comprehensive analysis on its evolution pattern, critical transitions, and associated driving forces. The silicate weathering intensity in NE Tibet is characterized by a long-term Paleogene decrease, modulated by global cooling, and a Neogene increase that may be related to the East Asian summer monsoon (EASM) intensification. Three major system transitions in regional silicate weathering are identified at similar to 26-23 Ma, similar to 16 Ma and similar to 8 Ma, which are linked to enhanced EASM forced primarily by tectonic uplift at these intervals, with some surbordinate influences from global climate at similar to 16 Ma. We also capture an intensification of the 100-kyr cycle at similar to 16 Ma and similar to 8 Ma in the obtained silicate weathering record, which is in coincidence in time with the enhancement of the EASM. This might suggest some contribution of the Antarctic ice sheets on modulating the regional silicate weathering in the NE Tibetan Plateau on a timescale of 10(5)-10(6) years, through its influences on the EASM as proposed by previous studies.
关键词	CHINESE LOESS PLATEAU WESTERN QAIDAM BASIN XINING BASIN CARBON-CYCLE LATE MIOCENE GEOCHEMICAL RECORDS TECTONIC EVOLUTION CLIMATE-CHANGE MIDDLE EOCENE QILIAN SHAN
英文关键词	Cenozoic; chemical weathering; tectonic uplift; global cooling; Asian monsoon; clay mineral; Antarctic ice sheets; eccentricity cycle
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000766884000001
来源期刊	FRONTIERS IN EARTH SCIENCE
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/260739
推荐引用方式 GB/T 7714	Yang, Yibo,Han, Wenxia,Ye, Chengcheng,et al. Trends and Transitions in Silicate Weathering in the Asian Interior (NE Tibet) Since 53 Ma[J]. 中国科学院青藏高原研究所,2022,10.
APA	Yang, Yibo,Han, Wenxia,Ye, Chengcheng,Galy, Albert,&Fang, Xiaomin.(2022).Trends and Transitions in Silicate Weathering in the Asian Interior (NE Tibet) Since 53 Ma.FRONTIERS IN EARTH SCIENCE,10.
MLA	Yang, Yibo,et al."Trends and Transitions in Silicate Weathering in the Asian Interior (NE Tibet) Since 53 Ma".FRONTIERS IN EARTH SCIENCE 10(2022).