Spatial and seasonal distributions of atmospheric carbonaceous aerosols in pearl river delta region, china--颗粒学报PARTICUOLOGY

Cao, J., Lee, S., Ho, K., Zou, S., Zhang, X., & Pan, J. (2003). Spatial and seasonal distributions of atmospheric carbonaceous aerosols in pearl river delta region, china. China Particuology, 1(1), 33-37. https://doi.org/10.1016/S1672-2515(07)60097-9

Spatial and seasonal distributions of atmospheric carbonaceous aerosols in pearl river delta region, china

Junji Cao ^a *, Shuncheng Lee ^b, Kinfai Ho ^b, Shichun Zou ^c, Xiaoye Zhang ^a, Jianguo Pan ^d

a State Key Laboratory of Loess & Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710054, P. R. China
b Research Center for Urban Environmental Technology and Management, Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hong Kong, P. R. China
c Department of Chemistry, Zhongshan University, Guangzhou 510275, P. R. China
d Zhuhai Environmental Monitoring Station, Zhuhai 519000, P. R. China

10.1016/S1672-2515(07)60097-9

Volume 1, Issue 1, April 2003, Pages 33-37

Received 17 March 2003, Accepted 31 March 2003, Available online 30 November 2007.

E-mail: cao@loess.llqg.ac.cn

Highlights

Abstract

Concentrations and spatial distributions of organic carbon (OC) and elemental carbon (EC) in atmospheric particles were measured at 8 sites in four cities (Hong Kong, Guangzhou, Shenzhen and Zhuhai) of Pearl River Delta Region (PRDR), China during 2001 winter period and 2002 summer period. PM_2.5 (particle diameter smaller than 2.5 μm) and PM₁₀ (particle diameter smaller than 10 μm) samples were collected on pre-fired quartz filters with mini-volume samplers and analyzed using thermal optical reflectance (TOR) method. The average PM_2.5 and PM₁₀ level were 60.1 and 93.1 μg·m⁻³, respectively, with PM_2.5 constituting 65.3% of the PM₁₀ mass. The average OC and EC concentrations in PM_2.5 were 12.0 and 5.1 μg·m⁻³, respectively, while those in PM₁₀ were 16.0 and 6.5 μg·m⁻³, respectively. The carbonaceous aerosol accounted for 37.2% of the PM_2.5 and 32.8% of the PM₁₀. The highest concentrations of OC and EC were observed at Guangzhou city in both winter and summer seasons. The average OC/EC ratios were 2.4 for PM_2.5 and 2.5 for PM₁₀, indicating the presence of secondary organic aerosols. The OC and EC in PRDR were found to be strongly correlated (correlation coefficients > 0.6), which implied that similar emission source contribute to the ambient carbon particles.

Graphical abstract

Keywords

PM_2.5; PM₁₀; Organic carbon; Elemental carbon; OC/EC ratio; Pearl River Delta Region

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