中山大学学报自然科学版 ›› 2019, Vol. 58 ›› Issue (2): 58-67.doi: 10.13471/j.cnki.acta.snus.2019.02.008

• 论文 • 上一篇    下一篇

广州市秋季气溶胶光学特性日变化

汤玉明1,3,邓孺孺1,2,许敏端1,吴仪1   

  1. 1.中山大学地理科学与规划学院,广东 广州 510275;
    2.广东省水环境遥感监测工程技术研究中心,广东 广州 510275;
    3.国家海洋局南海规划与环境研究院,广东 广州510310
  • 收稿日期:2017-12-12 出版日期:2019-03-25 发布日期:2019-03-25
  • 通讯作者: 邓孺孺(1963年生),男;研究方向:水质遥感和大气环境遥感;E-mail:essdrr@mail.sysu.edu.cn

Diurnal characteristics of autumn ASD-aerosols over Guangzhou

TANG Yuming1,3,DENG Ruru1,2, XU Minduan1,WU Yi1   

  1. 1.School of Geography and Planning,Sun Yat-sen University,Guangzhou 510275,China;
    2. Guangdong Engineering Research Center of Water Environment Remote Sensing Monitoring,,Guangzhou 510275,China;
    3. South China Sea Planning and Environment Research Institute of State Oceanic Administration,Guangzhou 510310,China
  • Received:2017-12-12 Online:2019-03-25 Published:2019-03-25

摘要:

气溶胶光学参数可以表明气溶胶粒子含量的多少、大气的浑浊情况、粒子分布特征等,对研究气溶胶具有重大意义。利用ASD FieldSpec3地物光谱仪,观测广州市2017年10月23和31日以及11月1日秋季典型天的气溶胶粒子日变化情况,反演了气溶胶光学厚度、Angstrom参数、粒子体积谱并对其日变化特征进行了分析。结果表明:① 广州市秋季典型天的AOD值日变化量不大,总体趋势呈现波动式上升,各天AOD值略有差异;各天的波长指数均处于较高水平,说明广州市秋季典型天的气溶胶颗粒以细粒子为主;浑浊度系数普遍较低,表明大气较为清洁。② 各天气溶胶粒子AOD、体积浓度的变化与交通、工业等人类的生产、生活活动有较大关系,从9:00开始逐步积累,在15:00达到峰值。③ 广州市秋季典型天的气溶胶组分结构比例随时间变化不大,说明各天污染源较为固定。气溶胶体积谱为双峰型,主控粒子为小于0.1 μm的细粒子,主要由水溶性粒子和煤烟组成,此外由于地理位置因素存在少量的沙尘性和海洋性粒子,广州市整体气溶胶类型为城市工业型与海洋型的混合结构。

关键词: 气溶胶光学厚度(AOD), Angstrom参数, 气溶胶粒子谱, 广州市

Abstract:

 

Aerosol optical parameters can indicate content and distribution of aerosol particles, and turbidity of atmosphere, which are of great significance to the research of aerosols. ASD FieldSpec3 spectroradiometer was used to measure the diurnal variation of aerosol particle contents over Guangzhou city on October 23, October 31, November 1, 2017 in typical autumn for inverting and analyzing its aerosol optical depth, Angstrom parameter, volume concentration and number concentration. The results showed that: 1) The daily variation of AOD was not notable and slightly different from day to day, but generally showed an increase trend.
The wavelength indices of each day were high indicating that fine particles were principal components of aerosol particles in typical autumn day.  The turbidity coefficient was low showing that the atmosphere was in good condition.2) The AOD, volume concentration and number concentration of aerosol particles over Guangzhou increased continuously from 9 o’clock and reached a maximus at 15 o‘clock, which were possibly attributed to human activities. 3) The aerosol particles over Guangzhou showed a bimodal pattern in volume concentration. They were mainly composed of water-soluble and soot fine particles with sizes less than 0.1 μm, and showed a stable proportion between various aerosol particles, which did not change with time, indicating a relatively fixed pollution source. In addition, the slight amount of dust and  maritime particles represented that overall aerosol of Guangzhou was a hybrid  type made up of industrial and ocean type.

Key words: aerosol optical depth(AOD);angstrom parameter, aerosol size distribution, Guangzhou

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