气候变化领域集成服务门户(CCPortal): Mountain loess or desert loess? New insight of the sources of Asian atmospheric dust based on mineral magnetic characterization of surface sediments in NW China

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DOI	10.1016/j.atmosenv.2020.117564
	Mountain loess or desert loess? New insight of the sources of Asian atmospheric dust based on mineral magnetic characterization of surface sediments in NW China
	Xia D.; Wang Y.; Jia J.; Wei H.; Fan Y.; Jin M.; Chen F.
发表日期	2020
ISSN	1352-2310
卷号	232
英文摘要	The arid basins in NW China are one of the most important sources of Asian atmospheric dust. Numerous studies have been conducted of dust flux and its physical and chemical characteristics in terrestrial and marine sediments in East Asia. However, knowledge of the exact sources of the emitted dust is comparatively limited. In this study, we investigated the magnetic characteristics of 541 surface samples collected in NW China. Based on the application of cluster analysis, we propose that the silt in arid basins is sourced from the surrounding high mountains, and that rivers play an important role in transporting the material, whereas sand dunes are only a relatively limited store of silt. Comparison of the results with the magnetic characteristics of loess samples from the Chinese Loess Plateau (CLP) indicates that the slopes of the Kunlun-Alkin-Qilian Mountains System and the surrounding fluvial plains are the major sources of silty dust in NW China, and that the contribution of sediment from sand dunes has been overestimated. In addition, our results indicate that magnetic fingerprinting can be used to trace the pathway of dust transport, and that the loess deposits in central Asia and the CLP are more accurately described as ‘mountain loess’ rather than ‘desert loess’. © 2020 Elsevier Ltd
关键词	Dust emission Magnetic fingerprinting Northwest China Sediment provenance
语种	英语
scopus关键词	Atmospheric chemistry; Cluster analysis; Dust; Landforms; Magnetism; Silt; Submarine geology; Atmospheric dust; Chinese Loess Plateau; Magnetic characteristic; Magnetic characterization; Magnetic fingerprinting; Marine sediments; Physical and chemical characteristics; Surface sediments; Sediments; magnetite; mineral; atmospheric pollution; dust; loess; mineral property; physicochemical property; sediment pollution; Article; China; concentration (parameter); controlled study; desert; dust; introspection; loess; measurement; mountain loess; particle size; priority journal; sediment; China; Kunlun Mountains; Loess Plateau; Qilian Mountains
来源期刊	ATMOSPHERIC ENVIRONMENT
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/249135
作者单位	MOE Key Laboratory of West China's Environmental System, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, 730000, China; College of Tourism and Resource Environmental, Zaozhuang University, Zaozhuang, 277100, China; College of Geography and Environmental Sciences, Zhejiang Normal University, Zhejiang, 321004, China; Key Laboratory of Alpine Ecology, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China
推荐引用方式 GB/T 7714	Xia D.,Wang Y.,Jia J.,et al. Mountain loess or desert loess? New insight of the sources of Asian atmospheric dust based on mineral magnetic characterization of surface sediments in NW China[J]. 中国科学院青藏高原研究所,2020,232.
APA	Xia D..,Wang Y..,Jia J..,Wei H..,Fan Y..,...&Chen F..(2020).Mountain loess or desert loess? New insight of the sources of Asian atmospheric dust based on mineral magnetic characterization of surface sediments in NW China.ATMOSPHERIC ENVIRONMENT,232.
MLA	Xia D.,et al."Mountain loess or desert loess? New insight of the sources of Asian atmospheric dust based on mineral magnetic characterization of surface sediments in NW China".ATMOSPHERIC ENVIRONMENT 232(2020).