基于光腔衰荡光谱技术的大气气溶胶消光性质观测研究  

Characteristic observation of atmospheric aerosol extinction based on cavity ring-down spectroscopy

作　　者：黄晓[1] 郭艳林 洪义[1] 董俊国[1] 高伟[2] 李梅[2] 黄正旭[2] 傅忠 程平[1] 周振[2] 

机构地区：[1]上海大学环境与化学工程学院,上海200444 [2]暨南大学环境安全与污染控制研究所,广东广州510632 [3]昆山禾信质谱技术有限公司,江苏昆山215133

出　　处：《量子电子学报》2016年第3期348-355,共8页Chinese Journal of Quantum Electronics

基　　金：江苏省自然科学基金;BK20140423~~

摘　　要：通过自主研发的基于光腔衰荡光谱技术的气溶胶消光仪,对昆山大气气溶胶的消光性质进行观测实验,并研究了相对湿度对气溶胶消光系数的影响。观测结果表明:监测点的大气气溶胶消光系数较高,且日变化在早晨7:00出现最高值,至下午17:00达到最低值后开始回升,其主要是由气象条件及周边强污染源的影响造成。气溶胶亲水特性实验表明:监测点的大气气溶胶多为污染海洋型,受周围环境相对湿度的影响较大。该研究结果为后期结合气溶胶质谱等其它监测仪器对该地大气气溶胶性质进行进一步观测研究具有一定的指导意义。Laser cavity ring-down spectrometers（CRDS）developed are used to investigate the aerosol light extinction and the influence caused by relative humidity during a long term experiment around Kunshan,Jiangsu.Observation results show that mean value of extinction coefficient is quite high,and a clear diurnal pattern is observed in extinction coefficient with maximum occurring at 7：00,dropping down to minimum at17：00,then rising again,which is caused by the great influence of the surrounding heavily polluted areas and meteorological conditions.Results for the hydrophilic properties of atmospheric aerosol in the monitoring site show that atmospheric aerosol is hydrophilic type,and extinction coefficient is susceptible to the ambient relative humidity.The results have certain guiding significance for the further study of atmospheric aerosol properties of this area with aerosol mass spectrometry and other monitoring instruments.

关 键 词：光谱学 消光性质 腔衰荡光谱 相对湿度 

分 类 号：O433[机械工程—光学工程]