干旱区生态环境知识资源中心(Arid): Identifying the natural and agricultural impacts on the glaciochemistry of the Aru ice core on the northwestern Tibetan Plateau

Arid

DOI	10.1016/j.scitotenv.2023.167501
	Identifying the natural and agricultural impacts on the glaciochemistry of the Aru ice core on the northwestern Tibetan Plateau
	Yang, Dandan; Yao, Tandong; Wu, Guangjian; Zhao, Huabiao; Zhu, Meilin; Deji; Qu, Dongmei; Shi, Yanyun
通讯作者	Yao, TD
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2024
卷号	906
英文摘要	Glaciochemical data sourced from ice cores in polar regions and the Alps have been extensively examined. However, quantitative studies on glaciochemical records of the Tibetan Plateau (TP) are scarce. To address this, we investigated annual variations in the major soluble ions (Ca2+, Mg2+, Na+, K+, NH4+, Cl-, NO3-, and SO42-) in the Aru ice core on the northwestern TP from 1850 to 2016. Applying a positive matrix factorization model, the sources of the major soluble ions and three factors to evaluate natural and agricultural impacts were identified. Factor 1, crustal dust with high loadings of Mg2+ (81.9 %) and Ca2+ (68.7 %), significantly positively correlated with wind speed and significantly negatively correlated with delta O-18 and net accumulation recorded by the ice core, suggesting that strong winds contributed to crustal dust transport from arid and semi-arid regions of Central Asia and deposition in the Aru glacier. However, relatively warm and wet climate prevented the transport of crustal dust. Factor 2 comprised salt lakes with high dominant loadings of Na+ (75.3 %), SO42- (64.1 %), Cl (60.8 %), NO3- (52.2 %), and K+ (49.4 %). Declining lake water levels exposed salt lake minerals, which were carried to glaciers under the dynamic conditions of strong winds, whereas warming resulted in an expansion of glacial meltwater and lake water volume, which decreased the contribution of salt lake sediments. Therefore, the contribution of salt lake deposition decreased. Factor 3 was agricultural sources with a high loading of NH4+ (82 %), whose trend aligned closely with the population number and N productions from agricultural sources in South and Central Asia, suggesting that NH3 emissions from agricultural practices are a critical contributor to Factor 3. This study quantified the proportional contribution of natural and agricultural sources to glaciochemical composition, advancing our understanding of glaciochemical records in ice cores from source recognition to quantification.
英文关键词	Aru ice core Major soluble ions Crustal dust Salt lakes Agricultural source Northwestern Tibetan Plateau
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001158854100001
WOS关键词	POSITIVE MATRIX FACTORIZATION ; CHEMICAL-COMPOSITION ; ANTHROPOGENIC SULFATE ; SOURCE APPORTIONMENT ; AMMONIA EMISSIONS ; RONGBUK GLACIER ; GREENLAND ICE ; DUST STORMS ; RECORD ; PM2.5
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405421
推荐引用方式 GB/T 7714	Yang, Dandan,Yao, Tandong,Wu, Guangjian,et al. Identifying the natural and agricultural impacts on the glaciochemistry of the Aru ice core on the northwestern Tibetan Plateau[J],2024,906.
APA	Yang, Dandan.,Yao, Tandong.,Wu, Guangjian.,Zhao, Huabiao.,Zhu, Meilin.,...&Shi, Yanyun.(2024).Identifying the natural and agricultural impacts on the glaciochemistry of the Aru ice core on the northwestern Tibetan Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,906.
MLA	Yang, Dandan,et al."Identifying the natural and agricultural impacts on the glaciochemistry of the Aru ice core on the northwestern Tibetan Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 906(2024).