| 摘要: |
| 针对2014年5月末华东地区出现的大范围秸秆焚烧污染事件（BB），利用上海浦东超级站多种在线监测数据，并结合卫星遥感、数值模拟等方法，对污染期间前（BB-前）、中（BB-中）、后（BB-后）的时空演化进程进行了分析。结果表明，期间平均ρ(PM2.5)和ρ(BC)分别由BB-前的24.3和1.24 μg/m3攀升至BB-中的111.90和5.38 μg/m3，小时峰值出现在5月27日，达到238.0和15.1μg/m3，BB-后虽有显著好转，但“翘尾”现象明显，ρ(PM2.5)和ρ(BC)为34.6和1.49 μg/m3；在空气污染扩散不利条件下，生物质燃烧污染会加重其他多种污染物的污染水平；农田秸秆燃烧烟羽的传输受气象条件所限，使得上海外围火点的多寡与城市污染的水平无必然联系。 |
| 关键词: 生物质燃烧 可入肺颗粒物 上海 |
| DOI： |
| 分类号:X513 |
| 基金项目:上海市科学技术委员会科研专项基金资助项目（14DZ1202901） |
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| Evolution of Biomass Burning on Urban Air Quality: a Case Study of Spring 2014 in Shanghai |
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ZOU Zhong1，SHA Fei1，CAI Yan1，CHANG Yun hua2，ZHAO Qian biao31,2,3
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1. Pudong New Area Environmental Monitoring Station, Shanghai 200135, China;2. Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China;3. Shanghai Environmental Monitoring Center, Shanghai 200030, China
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| Abstract: |
| In this study, a range of environmental monitoring data were collected from the late of May 2014 by multiple on line monitoring instruments at Shanghai Pudong supersite to investigate a typical biomass burning (BB) episode in East China. Moreover, auxiliary information, including MODIS fire spots, airflow backward trajectory as well as meteorological field simulation were combined to unveil the spatial temporal evolution before, during, and after the outbreak of BB pollution event. The results showed that during the pollution episode, the average mass concentration of PM2.5and BC reached 111.90 μg/m3 and 5.38 μg/m3, respectively, which were much higher than that of before (24.3 μg/m3 and 1.24 μg/m3) and after (34.6 μg/m3 and 1.49 μg/m3) the BB pollution episode. The pollution peak occurred on 27 May (238.0 μg/m3 and 15.1 μg/m3). Under the condition of bad spread of air pollution, BB could strengthen the pollution levels of some other pollutants. Lastly, given that the transport pattern of BB plumes were subjected to meteorological field, there was no obvious correlation between the number of fire spots in the periphery and the pollution levels in Shanghai. |
| Key words: Biomass burning PM2.5 Shanghai |
