基于OPAC的典型环境及气溶胶的消光特性分析  

Analysis of extinction characteristics of typical environment and aerosol based on OPAC

作　　者：王晓蕾[1] 李庆辉 Wang Xiaolei;Li Qinghui(College of Meteorology and Oceanography,National University of Defense Technology,University of Science and Technology of China,Changsha 410073)

机构地区：[1]国防科技大学气象海洋学院,长沙410073

出　　处：《气象水文海洋仪器》2022年第4期1-5,14,共6页Meteorological,Hydrological and Marine Instruments

基　　金：国家自然科学基金面上项目“表面修饰超憎水材料露霜凝结机理及测湿技术研究”(41475022)资助。

摘　　要：为了探究典型环境不同探测光波长的消光系数的关系,提高能见度测量的准确性,文章利用云和气溶胶粒子的光学特性软件(OPAC)计算了陆地型、海洋型、沙漠型和城市型等4类6种典型环境的消光系数,定义了典型环境消光系数与波长关系的修正值Ecd。结果表明:6种典型环境的修正值Ecd随波长的变化可以分为两类,第一类包括大陆和城市类型,Ecd分为两个波段内的线性变化;第二类包括海洋和沙漠类型,Ecd呈指数衰减。由此建立了典型环境以及气溶胶消光系数与相对湿度和波长的函数关系。In order to explore the relationship between extinction coefficients of different detection light wavelengths in typical environments, and improve the accuracy of visibility measurement, this paper calculates the extinction coefficients of six typical environments in four types of land, sea, desert and city by using the optical properties software(OPAC) of cloud and aerosol particles.The correction value Ecdof the relationship between extinction coefficient and wavelength in typical environment is defined.The results show that the correction value Ecdof the six typical environments with wavelength can be divided into two categories.The first category includes continental and urban types.The Ecdis divided into two linear changes in the band.The second category includes ocean and desert types, and the Ecddecays exponentially.Thus, a typical environment and aerosol extinction coefficient as a function of relative humidity and wavelength are established.

关 键 词：OPAC 典型环境 气溶胶成分 消光特性 

分 类 号：P422.3[天文地球—大气科学及气象学]