东南沿海地区相对湿度对气溶胶消光特性的影响

尹凯欣; 范承玉; 王海涛; 乔春红; 张鹏飞

doi:doi:10.11884/hplpb201527.071011

强激光与粒子束, 2015, 27 (7): 071011, 网络出版: 2015-07-10

东南沿海地区相对湿度对气溶胶消光特性的影响

Research on aerosol extinction characteristics in haze and fine weather in southeast coastal area of China

论文大纲

尹凯欣 ^*范承玉王海涛乔春红张鹏飞

作者单位

中国科学院安徽光学精密机械研究所,中科院大气成分与光学重点实验室, 合肥 230031

气溶胶雾霾消光系数相对湿度潮解点 aerosol haze weather extinction coefficient relative humidity deliquescence point

摘要

采用能见度仪和温度脉动仪在我国东南沿海典型地区进行能见度和相对湿度测量实验,利用能见度与消光系数和波长的关系,分析了在雾霾和晴好两种天气条件下相对湿度对沿海气溶胶系统消光系数的影响.研究结果表明:对于波长为1.06 μm的激光,该地区两种天气下气溶胶粒子的潮解点均为80%左右;当相对湿度在80%~90%时,随着相对湿度增大,两种天气下消光系数相对干粒子时的增长率基本相同,吸湿增长因子主要介于1~2;当相对湿度大于90%时,二者相对增长差别很大,晴好天气下吸湿增长因子增大了两个量级,远大于雾霾天气.

Abstract

The extinction characteristics of aerosol have great influence on the effective transmission of laser propagating in atmosphere.In recent years,with the declining of air quality the aerosol pollution is becoming serious,resulting in haze weather occurs from time to time.In order to analyze the dependence of extinction coefficient on ambient relative humidity(RH) under the two cases of weather in coastal area,visibility(V),as well as relative humidity in the southeast coastal area of China is measured by experiments.The results show that the deliquescence points of aerosol particles under the two kinds of weather are both about 80%;after deliquescence,the extinction coefficient increases with the increasing of relative humidity.For the laser with a wavelength of 1.06 μm,an order of difference of magnitude for extinction coefficient of haze and fine weather.However,when 80%90%,the difference is very large.The f(RH) increased by two orders of magnitude in good weather,which is significance on laser propagation in the atmosphere.

参考文献

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尹凯欣, 范承玉, 王海涛, 乔春红, 张鹏飞. 东南沿海地区相对湿度对气溶胶消光特性的影响[J]. 强激光与粒子束, 2015, 27(7): 071011. Yin Kaixin, Fan Chengyu, Wang Haitao, Qiao Chunhong, Zhang Pengfei. Research on aerosol extinction characteristics in haze and fine weather in southeast coastal area of China[J]. High Power Laser and Particle Beams, 2015, 27(7): 071011.

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