DOI: 10.1016/j.atmosenv.2015.09.009
Scopus记录号: 2-s2.0-84941634192
论文题名: Geochemical evidence for seasonal variations in potential loess sources of the western Chinese Loess Plateau
作者: Wang X ; , Lang L ; , Li H ; , Hua T ; , Wang G ; , Zhou N ; , Jiao L
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 120 起始页码: 369
结束页码: 375
语种: 英语
英文关键词: Chinese Loess Plateau
; Loess
; Principal components analysis
; Source
Scopus关键词: Air pollution
; Arid regions
; Deposition
; Deposition rates
; Dust
; Exploratory geochemistry
; Fallout
; Geochemistry
; Landforms
; Particle size
; Pollution
; Sediments
; Stratigraphy
; Trace elements
; Chinese Loess Plateau
; Environmental reconstruction
; Geochemical characteristic
; Loess
; Macro and trace elements
; Principal components analysis
; Source
; Western Chinese Loess Plateau
; Principal component analysis
; trace element
; dust
; fallout
; loess
; particle size
; pollutant source
; principal component analysis
; rare earth element
; seasonal variation
; trace element
; wet deposition
; Article
; autumn
; China
; dry deposition
; geochemical analysis
; loess
; particle size
; pollutant
; principal component analysis
; priority journal
; seasonal variation
; soil analysis
; spring
; summer
; wet deposition
; winter
; China
; Loess Plateau
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: This paper aims to characterize seasonal variations in the potential sources of loess deposited on the western Chinese Loess Plateau (CLP). Fallout was sampled every five days between March 2013 and August 2014 at Jiuzhoutai, the site with the largest loess deposits in northwest China. A total of 45 macro and trace elements, as well as rare earth elements, were analyzed in the samples. The results show that, at present, the potential sources of loess are mixed with pollutants. After exclusion of the pollutants, principal component analysis (PCA) showed significant seasonal variations in the potential loess sources on the western CLP. During the spring, summer-autumn, and winter periods, there are possibly six, four, and two potential loess sources, respectively, with crustal provenance at Jiuzhoutai. No significant differences in fallout amounts were found on the western CLP during periods with and without dust events, which suggests that the frequency of dust events may not be an effective index for deposition rates in areas of loess formation. The relatively high proportion of coarser material (>50 μm in diameter) in the fallout indicates that at least part of the loess in the fallout samples originated from adjacent deserts and associated systems, and that both dry and wet deposition contributed equally to the fallout. Based on the significant seasonal and spatial variations in the loess sources, combined with variations in the link between the different particle size classes and the geochemical characteristics of potential components of the loess on the western CLP, the use of the geochemical characteristics of loess stratigraphic sequences as a proxy for regional paleoclimatic and environmental reconstructions should be carefully appraised. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81481
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China; Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, China
Recommended Citation:
Wang X,, Lang L,, Li H,et al. Geochemical evidence for seasonal variations in potential loess sources of the western Chinese Loess Plateau[J]. Atmospheric Environment,2015-01-01,120