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山西夏季气溶胶散射特征的飞机观测研究
作者:
作者单位:

1.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;2.山西省人工降雨防雹办公室,太原 030032

作者简介:

封秋娟,女,1982年出生,硕士研究生,主要从事大气物理与大气环境方面的研究。E-mail: fqj119818@163.com

通讯作者:

牛生杰,E-mail: niusj@nuist.edu.cn

基金项目:

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


Aircraft Measurements of the Scattering Properties of Aerosols in Shanxi Province in Summer
Author:
Affiliation:

1.Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology, Nanjing 210044;2.Weather Modification Office of Shanxi Province, Taiyuan 030032

Fund Project:

National Natural Science Foundation of China Grant 41605109;Key Project of Shanxi Meteorological Bureau Grant SXKZDRY20165205;Postgraduate Training Innovation Project of Jiangsu Province Grant KYLX16_0938;General Research Project of Shanxi Meteorological Bureau Grant SXKYBDQ201510042National Natural Science Foundation of China (Grant 41605109), Key Project of Shanxi Meteorological Bureau (Grant SXKZDRY20165205), Postgraduate Training Innovation Project of Jiangsu Province (Grant KYLX16_0938), General Research Project of Shanxi Meteorological Bureau (Grant SXKYBDQ201510042)

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    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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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. 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.

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  • 收稿日期:2018-01-30
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  • 在线发布日期: 2019-08-08
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