| Evolution of Aerosol Vertical Distribution During Particulate Pollution Events in Shanghai |
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| 作者姓名： | 张云伟 张群 冷春鹏 张德芹 成天涛 陶俊 张仁健 贺千山 |
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| 作者单位： | Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention,Department of Environmental Science & Engineering,Fudan University;Fudan-Tyndall Centre,Fudan University;South China Institute of Environmental Sciences,Ministry of Environmental Protection;Key Laboratory of Regional Climate-Environment Research for Temperate East Asia,Institute of Atmospheric Physics,Chinese Academy of Sciences;Shanghai Meteorological Bureau |
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| 摘 要： | A set of micro pulse lidar(MPL)systems operating at 532 nm was used for ground-based observation of aerosols in Shanghai in 2011.Three typical particulate pollution events(e.g.,haze)were examined to determine the evolution of aerosol vertical distribution and the planetary boundary layer(PBL)during these pollution episodes.The aerosol vertical extinction coefficient(VEC)at any given measured altitude was prominently larger during haze periods than that before or after the associated event.Aerosols originating from various source regions exerted forcing to some extent on aerosol loading and vertical layering,leading to different aerosol vertical distribution structures.Aerosol VECs were always maximized near the surface owing to the potential influence of local pollutant emissions.Several peaks in aerosol VECs were found at altitudes above 1 km during the dust-and bioburning-influenced haze events.Aerosol VECs decreased with increasing altitude during the local-polluted haze event,with a single maximum in the surface atmosphere.PM2.5 increased slowly while PBL and visibility decreased gradually in the early stages of haze events;subsequently,PM2.5 accumulated and was exacerbated until serious pollution bursts occurred in the middle and later stages.The results reveal that aerosols from different sources impact aerosol vertical distributions in the atmosphere and that the relationship between PBL and pollutant loadings may play an important role in the formation of pollution.
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| 关 键 词： | Aerosol aerosol particulate extinction visibility accumulated emissions anthropogenic lidar forcing |
Evolution of aerosol vertical distribution during particulate pollution events in Shanghai |
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| Yunwei?Zhang,Qun?Zhang,Chunpeng?Leng,Deqin?Zhang,Tiantao?ChengEmail author,Jun?Tao,Renjian?Zhang,Qianshan?He.Evolution of Aerosol Vertical Distribution During Particulate Pollution Events in Shanghai[J].Acta Meteorologica Sinica,2015,29(3):385-399. |
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| Authors: | Yunwei?Zhang Qun?Zhang Chunpeng?Leng Deqin?Zhang Email author" target="_blank">Tiantao?ChengEmail author Jun?Tao Renjian?Zhang Qianshan?He |
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| Affiliation: | 1.Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention, Department of Environmental Science & Engineering,Fudan University,Shanghai,China;2.Fudan-Tyndall Centre,Fudan University,Shanghai,China;3.South China Institute of Environmental Sciences,Ministry of Environmental Protection,Guangzhou,China;4.Key Laboratory of Regional Climate-Environment Research for Temperate East Asia, Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing,China;5.Shanghai Meteorological Bureau,Shanghai,China |
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| Abstract: | A set of micro pulse lidar (MPL) systems operating at 532 nm was used for ground-based observation of aerosols in Shanghai in 2011. Three typical particulate pollution events (e.g., haze) were examined to determine the evolution of aerosol vertical distribution and the planetary boundary layer (PBL) during these pollution episodes. The aerosol vertical extinction coefficient (VEC) at any given measured altitude was prominently larger during haze periods than that before or after the associated event. Aerosols originating from various source regions exerted forcing to some extent on aerosol loading and vertical layering, leading to different aerosol vertical distribution structures. Aerosol VECs were always maximized near the surface owing to the potential influence of local pollutant emissions. Several peaks in aerosol VECs were found at altitudes above 1 km during the dust- and bioburning-influenced haze events. Aerosol VECs decreased with increasing altitude during the local-polluted haze event, with a single maximum in the surface atmosphere. PM2.5 increased slowly while PBL and visibility decreased gradually in the early stages of haze events; subsequently, PM2.5 accumulated and was exacerbated until serious pollution bursts occurred in the middle and later stages. The results reveal that aerosols from different sources impact aerosol vertical distributions in the atmosphere and that the relationship between PBL and pollutant loadings may play an important role in the formation of pollution. |
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