Distribution of carbonaceous aerosol during spring 2005 over the horqin sandland in northeastern china--颗粒学报PARTICUOLOGY

Li, X., Shen, Z., Cao, J., Liu, S., Zhu, C., & Zhang, T. (2006). Distribution of carbonaceous aerosol during spring 2005 over the horqin sandland in northeastern china. China Particuology, 4(6), 316-322. https://doi.org/10.1016/S1672-2515(07)60282-6

Distribution of carbonaceous aerosol during spring 2005 over the horqin sandland in northeastern china

Xuxiang Li ^a^b, Zhenxing Shen ^{a b}*, Junji Cao ^{b a}, Suixin Liu ^b, Chongshu Zhu ^b, Ting Zhang ^b

a Department of Environmental Science and Technology, Xi'an Jiaotong University, Xi'an 710049, China
b SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China

10.1016/S1672-2515(07)60282-6

Volume 4, Issue 6, December 2006, Pages 316-322

Received 8 May 2006, Accepted 7 October 2006, Available online 14 December 2007.

E-mail: zxshen@mail.xjtu.edu.cn

Highlights

Abstract

The objective of this study was to characterize the elemental carbon and organic carbon (EC and OC, respectively) content of aerosol particles (PM_2.5) collected at Tongliao, a site in the Horqin Sandland of northeastern China. During spring 2005, the PM_2.5 mass concentration was 126±71 μg·m⁻³, with higher dust concentrations during five dust storms than on non-dusty days (255±77 vs. 106±44 μg·m⁻³). The average OC and EC concentrations in PM_2.5 determined by a thermal/optical reflectance method were 15.7±7.3 μg·m⁻³ and 3.3±1.7 μg·m⁻³, respectively, and carbonaceous aerosol accounted for 9.9% of the PM2.5 mass during dust storms compared to 21.7% on normal days. The average ratios of OC to EC during dust storms were similar to those on non-dusty days, and the correlation coefficient between OC and EC was high, 0.86. The high OC/EC ratios, the distributions of eight carbon fractions, and the strong relationship between K with OC and EC indicate that rural biomass burning was the dominant contributor to the regional carbonaceous aerosol.

Graphical abstract

Keywords

dust storm; organic carbon; elemental carbon; Horqin

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