期刊
ARABIAN JOURNAL OF GEOSCIENCES
卷 13, 期 21, 页码 -出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s12517-020-06133-9
关键词
Dustfall; Pollutant; Loess; Source; Chinese Loess Plateau
资金
- National Natural Science Foundation of China [41930640, 41771012]
- National Key Research and Development Program of China [2016YFA0601900]
- Key Frontier Program of Chinese Academy of Sciences [QYZDJSSWDQC043]
Dustfall samples from the western Chinese Loess Plateau (CLP) were collected from 2013 to 2016 at Jiuzhoutai for dustfall variation analysis. Results showed that the seasonal dustfall variations were non-significant in the region, indicating dustfall sources with inconsistent patterns largely contributed to the modern loess formation. The average rate of loess accumulation was approximately 0.34 mm/year, which is much higher compared to the other periods of the Holocene. In addition, the lack of regular patterns of dustfall contents in the coarse fraction (> 50 mu m in diameter) indicates a proximal source with crustal origins, which is a dominant source for the modern loess. From 2013 to 2016, the dustfall from crustal origins increased by approximately 19%, and among those collected dustfall, approximately 24% came from pollutants, indicating that anthropogenic activities such as industrial pollutants and vehicle emissions played an important role in modern loess accumulation.
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