气溶胶光学吸湿增长特性测量方法研究进展  

Research progress of methods of aerosol optical hygroscopic properties measurement

作　　者：周家成 徐学哲[1] 方波[1] 张杨 赵卫雄[1] 张为俊[1,3] ZHOU Jiacheng;XU Xuezhe;FANG Bo;ZHANG Yang;ZHAO Weixiong;ZHANG Weijun(Laboratory of Atmospheric Physico-Chemistry,Anhui Institute of Optics and Fine Mechanics,HFIPS,Chinese Academy of Sciences,Hefei 230031,China;Graduate School,University of Science and Technology of China,Hefei 230026,China;School of Environmental Science and Optoelectronic Technology,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]中国科学院合肥物质科学研究院安徽光学精密机械研究所大气物理化学研究室,安徽合肥230031 [2]中国科学技术大学研究生院,安徽合肥230026 [3]中国科学技术大学环境科学与光电技术学院,安徽合肥230026

出　　处：《大气与环境光学学报》2022年第1期92-103,共12页Journal of Atmospheric and Environmental Optics

基　　金：国家自然科学基金,41905118,42022051;中国科学院青年创新促进会,Y202089。

摘　　要：吸湿性气溶胶会吸收环境空气中的水分,其粒径会随相对湿度的增加而发生变化,从而导致气溶胶的光学特性(如消光、散射、吸收系数与单次散射反照率等)发生显著的变化。气溶胶光学吸湿增长因子(湿状态与干状态下光学参数的比值)是衡量气溶胶光学吸湿增长能力的特征参数,是计算大气能见度和气溶胶辐射强迫的关键输入量,它的准确测量对于气溶胶环境和气候效应的评估具有重要意义。光学吸湿增长测量系统主要包括湿度调节系统和光学测量装置,通过湿度调节系统改变样品的相对湿度,再结合光学测量装置实时测量光学参数的变化,从而实现光学吸湿特性的在线测量。鉴于气溶胶吸湿性研究的重要意义,重点分析对比了现有的光学吸湿增长测量方法及应用,并对下一步气溶胶光学吸湿增长特性测量技术和研究方向做了展望。Hygroscopic aerosols can take up water in ambient air,and their particle size will change with the increase of relative humidity,leading to dramatic changes in optical properties(such as extinction,scattering and absorption coefficients,and single scattering albedo,etc.).The hygroscopic growth factors of aerosol optical properties(the ratio of optical parameters in wet state to dry state)are characteristic parameters representing the growth capacities of aerosols optical hygroscopicity,and also key parameters in assessing the effects of aerosols on atmospheric visibility and radiative forcing.Thus,accurate measurment of optical hygroscopic growth factors is of great significance for the evaluation of aerosol environment and climate effects.The optical hygroscopic growth measurement system consists of an optical measurement device and a humidity control system.The humidity adjustment system is used to change and control the relative humidity of samples,and the optical measurement device measures the corresponding changes of optical parameters in real time to achieve the on-line measurement of optical hygroscopic properties.In view of the significance of aerosol hygroscopicity research,the existing optical hygroscopic measurement methods and their applications are analyzed and compared comprehensively,and the research directions of measurement techniques and experimental works on aerosol hygroscopicity in the future are prospected.

关 键 词：气溶胶 光学特性 吸湿性 测量方法 

分 类 号：X513[环境科学与工程—环境工程] X-1