globalchange  > 气候变化与战略
DOI: 10.1016/j.atmosenv.2020.117564
论文题名:
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
作者: Xia D.; Wang Y.; Jia J.; Wei H.; Fan Y.; Jin M.; Chen F.
刊名: Atmospheric Environment
ISSN: 1352-2310
出版年: 2020
卷: 232
语种: 英语
英文关键词: 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
学科: Dust emission ; Magnetic fingerprinting ; Northwest China ; Sediment provenance
中文摘要: 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
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/160308
Appears in Collections:气候变化与战略

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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

Recommended Citation:
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]. Atmospheric Environment,2020-01-01,232
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