Contribution of autumn biomass burning to organic aerosol in the Pearl River Delta region
YANG Lei1, YUAN Bin1, ZHENG E1, YE Chen-shuo2, WANG Si-hang1, HE Xian-jun1, ZHANG Xiao-xiao1, HUANG Shan1, HU Wei-wei3, SHAO Min1
1. Institute for Environmental and Climate Research, Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality, Jinan University, Guangzhou 511443, China; 2. College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China; 3. The State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
Abstract：In this study, we applied thermal desorption chemical ionization Time-of-Flight mass spectrometer (FIGAERO-ToF-CIMS) to obtain high temporal resolution (i.e., hourly) measurements of levoglucosan, which is a widely-used tracer for biomass burning emissions. Using the dataset, we estimate the contributions of biomass burning to organic aerosol (OA) at an urban and a regional site in the autumn of Pearl River Delta (PRD) region. The results demonstrated that the average concentrations of levoglucosan at the urban and regional sites in the autumn PRD region were (0.07 ± 0.08) and (0.14 ± 0.12) μg/m3, respectively. We show that concentrations observed at the regional site were higher than the urban site. The diurnal variation of levoglucosan peaked in the morning and at night at both sites. It was observed that levoglucosan was poorly correlated with CO and acetonitrile at both sites, whereas significantly positive correlation was obtained with OA. The average contributions of biomass burning to OA were further estimated based on the tracer method to be 7.4% (urban site) and 11.4% (regional site), respectively, with significantly higher contributions at night than during the day.
杨磊, 袁斌, 郑锷, 叶晨朔, 王思行, 何贤俊, 张潇潇, 黄山, 胡伟伟, 邵敏. 珠江三角洲秋季生物质燃烧对有机气溶胶的贡献[J]. 中国环境科学, 2023, 43(1): 20-28.
YANG Lei, YUAN Bin, ZHENG E, YE Chen-shuo, WANG Si-hang, HE Xian-jun, ZHANG Xiao-xiao, HUANG Shan, HU Wei-wei, SHAO Min. Contribution of autumn biomass burning to organic aerosol in the Pearl River Delta region. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(1): 20-28.
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