NDLI: Size Distribution and Optical Properties of Particulate Matter (PM_(10)) and Black Carbon (BC) during Dust Storms and Local Air Pollution Events across a Loess Plateau Site

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Size Distribution and Optical Properties of Particulate Matter (PM_(10)) and Black Carbon (BC) during Dust Storms and Local Air Pollution Events across a Loess Plateau Site

Content Provider	Semantic Scholar
Author	Pu, Wei Guang Wang, Xin Xue-Ying, Zhang Ren, Yong Shi, Jinsen Bi, Jianrong Zhang, Beidou
Copyright Year	2015
Abstract	We analyzed the suspended particle size distribution in the range of 0.5 to 10 μm and the optical properties of the particles from March 2007 to December 2010 at a site on the Loess Plateau (SACOL; 35.57°N, 104.08°E; 1965.8 m a.s.l.) about 48 km southeast of the center of Lanzhou. The results indicated that the variation in PM10 was much larger in spring than in winter because of frequent dust events or local blowing soil dust during spring. The highest number concentrations of coarse-mode particles were likely attributable to dust events that transported mineral dust or soil dust in the spring season, caused by cold fronts or strong local winds. In contrast, the fine-mode particles that dominated in the cold season at SACOL were probably indicative of anthropogenic sources related to fossil-fuel combustion and biomass burning. The comparison of dust events and anthropogenic air pollution shows a clear distinction of lower PM10 with higher B_(ap) for pollution episodes and higher PM_(10) with lower Bap for dust events. These findings suggest that the results in the cold season were likely attributable to light absorption of black carbon, and the coarse mode particles were dominant during dust events in spring.
Starting Page	2212
Ending Page	2224
Page Count	13
File Format	PDF HTM / HTML
DOI	10.4209/aaqr.2015.02.0109
Volume Number	15
Alternate Webpage(s)	http://aaqr.org/files/article/536/4_AAQR-15-02-SIIAC-0109_2212-2224.pdf
Alternate Webpage(s)	https://doi.org/10.4209/aaqr.2015.02.0109
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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