Continuous measurements of atmospheric properties were performed at central region of Universiade at Shenzhen from Aug 11 to Sep 3 in 2011 by using automatic sun-photometer. We obtained aerosol optical depth ( AOD) during ( 12 days) and after (11 days) the Universiade and analyzed aerosol optical and micro-physical properties. Our results showed an averaged AOD of 0. 37 at 440 nm during the Universiade that was significantly lower than AOD after the Universiade (0.84). Analyses of aerosol size distribution illustrated that the reduction of AOD was mainly caused by the decrease of small particles, and thus suggested that the environmental control activities exerted good influence on the air quality.%利用全自动太阳辐射计,对深圳世界大运会主场馆附近大气特性开展了连续观测(2011-08-11-2011-09-03).获得了大运会期间(12 d)和大运会后(11 d),气溶胶光学厚度(AOD)等参数的变化情况,并对气溶胶光学和微物理特性进行了分析.结果表明,大运会期间440 nm处的AOD平均值为0.273,大运会之后的AOD平均值为0.983,大运会期间较大运会之后AOD平均值有显著降低.粒子谱分布等气溶胶微物理特性参数的分析还表明,AOD降低主要是由于细粒子含量的减少,说明环境控制措施对于空气质量产生了较好的改进效果.
展开▼
