doi:  10.3878/j.issn.1006-9585.2018.18020
山西夏季气溶胶散射特征的飞机观测研究

Aircraft Measurements of the Scattering Properties of Aerosols in Shanxi Province in Summer
摘要点击 353  全文点击 206  投稿时间:2018-01-30  
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基金:  国家自然科学基金项目41605109,山西省气象局重点科研项目SXKZDRY20165205,江苏省研究生培养创新工程项目KYLX16_0938,山西省气象局一般科研项目SXKYBDQ201510042
中文关键词:  气溶胶  散射特性  飞机观测  山西
英文关键词:  Aerosols  Scattering properties  Aircraft measurements  Shanxi Province
                 
作者中文名作者英文名单位
封秋娟FENG Qiujuan南京信息工程大学中国气象局气溶胶—云—降水重点开放实验室,南京 210044;山西省人工降雨防雹办公室,太原 030032
牛生杰NIU Shengjie南京信息工程大学中国气象局气溶胶—云—降水重点开放实验室,南京 210044
李培仁LI Peiren山西省人工降雨防雹办公室,太原 030032
杨俊梅YANG Junmei山西省人工降雨防雹办公室,太原 030032
申东东SHEN Dongdong山西省人工降雨防雹办公室,太原 030032
李义宇and LI Yiyu山西省人工降雨防雹办公室,太原 030032
引用:封秋娟,牛生杰,李培仁,杨俊梅,申东东,李义宇.2019.山西夏季气溶胶散射特征的飞机观测研究[J].气候与环境研究,24(4):482-492,doi:10.3878/j.issn.1006-9585.2018.18020.
Citation:FENG Qiujuan,NIU Shengjie,LI Peiren,YANG Junmei,SHEN Dongdong,and LI Yiyu.2019.Aircraft Measurements of the Scattering Properties of Aerosols in Shanxi Province in Summer[J].Climatic and Environmental Research(in Chinese),24(4):482-492,doi:10.3878/j.issn.1006-9585.2018.18020.
中文摘要:
      利用3个架次的积分浊度仪和PCASP-100X(Passive Cavity Aerosol Spectrometer Probe)机载观测资料,分析了2013年山西夏季空中有云、无云和少云3种不同条件下气溶胶散射系数的分布特征,讨论了气溶胶散射系数垂直变化与气溶胶数浓度、气象条件的关系,并结合HYSPLIT(Hybrid of Single Particle Lagrangian Integrated Trajectory model)后向轨迹模型研究气溶胶的运动轨迹和可能的污染来源。结果表明:山西夏季空中气溶胶总散射系数变化范围为0~499 Mm-1,晴空气溶胶数浓度和总散射系数明显大于有云和少云时。气溶胶总散射系数一般随高度的增加而递减。造成气溶胶总散射系数、数浓度偏高的原因有下垫面污染源多、风速小、相对湿度高以及逆温层的存在。550 nm波段气溶胶后向散射比大于0.1,粒径0.1~0.5 μm的气溶胶粒子对散射影响最大,说明山西空中细粒子污染比较严重。气溶胶总散射系数与数浓度有一定的相关性。引起气溶胶总散射系数、数浓度较高的气团传输路径主要为西南路径,局地排放的气溶胶大于远距离传输的气溶胶对散射系数的贡献。
Abstract:
      The aerosol total scattering coefficient and its relation to the aerosol number concentration and meteorological conditions on cloudy, sunny, and cloudless days were analyzed using the integrating nephelometer and PCASP(Passive Cavity Aerosol Spectrometer Probe)-100X of three aerosol detection flights over Shanxi Province in the summer of 2013. The movement tracks and possible sources of aerosol pollution were discussed using the HYSPLIT(Hybrid of Single Particle Lagrangian Integrated Trajectory) model. The results showed that the range of aerosol total scattering coefficient varied from 0 Mm-1 to 499 Mm-1. The aerosol total scattering coefficient and aerosol number concentration on sunny days were significantly higher than those on cloudy and cloudless days. The aerosol total scattering coefficient decreased with altitude. Given the multiple pollution sources in the underlying surface, low wind speed, high relative humidity, and existence of a temperature inversion layer, the aerosol total scattering coefficient and aerosol number concentration increased. The ratio of the backscattering coefficient of the 550 nm wavelength was larger than 0.1. The aerosol total scattering coefficient was mainly influenced by the particle size of 0.1-0.5 µm, indicating that a significant fraction of particulate matter in Shanxi Province was attributed to fine-grained particles. Furthermore, the air pathways, which caused the high aerosol total scattering coefficient and aerosol number concentration, are mainly from the southwest. The contribution of local near-surface sources to aerosol total scattering coefficient is greater than that of long-distance transmission.
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