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Characteristics and applications of size-segregated biomass burningtracers in China's Pearl River Delta region
Zhang,ZS(Zhang,Zhisheng)[1,2]; Gao,J(Gao,Jian)[2]; Engling,G(Engling,Guenter)[3,4]; Tao,J(Tao,Jun)[1]; Chai,FH(Chai,Fahe)[2]; Zhang,LM(Zhang,Leiming)[5]; Zhang,RJ(Zhang,Renjian)[6]; Sang,XF(Sang,Xuefang)[7]; Chan,CY(Chan,Chuen-yu)[7,8]; Lin,ZJ(Lin,Zejian)[1]; Cao,JJ(Cao,Junji)[8]
Source PublicationAtmospheric Environment

Biomass burning activities in China are ubiquitous and the resulting smoke emissions may pose considerable threats to human health and the environment. In the present study, size-segregated biomass burning tracers, including anhydrosugars (levoglucosan (LG) and mannosan (MN)) and nonsea-salt potassium (nss-Kþ), were determined at an urban and a suburban site in the Pearl River Delta (PRD) region. The size distributions of biomass burning tracers were generally characterized by a unimodal pattern peaking in the particle size range of 0.44e1.0 mm, except for MN during the wet season, for which a bimodal pattern (one in fine and one in coarse mode) was observed. These observed biomass burning tracers in the PRD region shifted towards larger particle sizes compared to the typical size distributions of fresh biomass smoke particles. Elevated biomass burning tracers were observed during the dry season when biomass burning activities were intensive and meteorological conditions favored the transport of biomass smoke particles from the rural areas in the PRD and neighboring areas to the sampling sites. The fine mode biomass burning tracers significantly correlated with each other, confirming their common sources. Rather high DLG/DMN ratios were observed at both sites, indicating limited influence from softwood combustion. High Dnss-Kþ/DLG ratios further suggested that biomass burning aerosols in the PRD were predominately associated with burning of crop residues. Using a simplified receptor-oriented approach with an emission factor of 0.075 (LG/TC) obtained from several chamber studies, average contributions of biomass burning emissions to total carbon in fine particles were estimated to be 23% and 16% at the urban and suburban site, respectively, during the dry season. In contrast, the relative contributions to total carbon were lower than 8% at both sites during the wet season.

KeywordBiomass Combustion Size Distribution Anhydrosugars Potassium Source-receptor Study
Indexed BySCI
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Document Type期刊论文
Affiliation1.South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou, China;
2.Chinese Research Academy of Environmental Sciences, Beijing, China;
3.Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, Hsinchu, Taiwan;
4.Division of Atmospheric Sciences, Desert Research Institute, Reno, NV, USA;
5.Air Quality Research Division, Science Technology Branch, Environment Canada, Toronto, Canada;
6.RCE-TEA, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China;
7.Sun Yat-sen University, Guangzhou, China;
8.Key Laboratory of Aerosol, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China
Recommended Citation
GB/T 7714
Zhang,ZS,Gao,J,Engling,G,et al. Characteristics and applications of size-segregated biomass burningtracers in China's Pearl River Delta region[J]. Atmospheric Environment,2015,102(2015):290-301.
APA Zhang,ZS.,Gao,J.,Engling,G.,Tao,J.,Chai,FH.,...&Cao,JJ.(2015).Characteristics and applications of size-segregated biomass burningtracers in China's Pearl River Delta region.Atmospheric Environment,102(2015),290-301.
MLA Zhang,ZS,et al."Characteristics and applications of size-segregated biomass burningtracers in China's Pearl River Delta region".Atmospheric Environment 102.2015(2015):290-301.
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