基于船载平台太阳光度计的渤海湾气溶胶光学特性  

Optical Properties of Aerosols in Bohai Bay Based on Shipboard Platform Sun-Photometer

作　　者：朱海 李建玉[1,3] 黄宏华 徐刚 戴聪明 魏合理 Zhu Hai;Li Jianyu;Huang Honghua;Xu Gang;Dai Congming;Wei Heli(Key Laboratory of Atmospheric Optics,Anhui Institute of Optics and Fine Mechanics,HFIPS,Chinese Academy of Sciences,Hefei 230031,Anhui,China;University of Science and Technology of China,Hefei 230031,Anhui,China;Advanced Laser Technology Laboratory of Anhui Province,Hefei 230037,Anhui,China)

机构地区：[1]中国科学院安徽光学精密机械研究所中国科学院大气光学重点实验室,安徽合肥230031 [2]中国科学技术大学,安徽合肥230031 [3]先进激光技术安徽省实验室,安徽合肥230037

出　　处：《光学学报》2023年第6期104-112,共9页Acta Optica Sinica

基　　金：国家重点研发计划课题(2019YFA0706004);安徽省重点实验室基金(E03DEG29)。

摘　　要：研制出一种可以在船载平台下完成气溶胶测量的太阳光度计。仪器采用两段式图像跟踪方法,首先利用鱼眼成像系统对太阳进行粗跟踪,之后通过精跟踪成像系统来提高跟踪精度,并阐述了二维转台、图像跟踪系统、测量光路的工作流程。利用船载平台太阳光度计在渤海湾进行长期观测,渤海湾日平均气溶胶光学厚度多集中在0.1~0.3范围内,大气较为洁净,且夏季大气以细粒子为主,而深秋大粒子占据主导地位。将所得结果与日本POM-01 MKⅢ船用太阳光度计的测量结果进行对比,发现气溶胶光学厚度日变化趋势基本相近,决定系数可达到0.968,其平均相对测量误差为4.83%,Angström指数平均相对测量误差为2.55%。所得结果验证了船载太阳光度计的可靠性与稳定性,并且可以进一步利用可见光到近红外的辐射信息反演其他大气参数的光学特性。Objective Aerosols play an important role in the balance of the earth's atmospheric radiation budget due to their complex composition and increasing particle concentration.Sun-photometer is an effective measurement device for remote sensing atmospheric parameters by measuring solar spectral radiation and is widely employed in ground-based remote sensing of aerosols.However,the sea covers a large area.In the research on the optical characteristics of aerosols on earth and climate change,there is an urgent need for a device that can measure the optical characteristics of aerosols with high accuracy under the shipboard platform to compensate for the lack of atmospheric data at sea.Methods The traditional sun-photometer is difficult to track the sun on a moving shipboard platform,which cannot meet the needs of sea aerosol observation.The research group develops a novel shipboard sun-photometer with a new tracking method.The sun can be tracked on a shipboard platform with an accuracy of better than 1'.This new sun-photometer could obtain radiation information in nine spectral bands of 400,440,532,550,780,870,940,1050,and 1064 nm at once.The aerosol information of the sea area can be obtained by direct solar radiation remote sensing on the mobile platform.The instrument adopts a two-segment image tracking method instead of the traditional four-quadrant tracking method.Firstly,the fish-eye imaging system is employed to obtain the whole sky image,and the coarse tracking of the sun is completed.Then,the precision tracking imaging system is leveraged to improve the resolution of the solar image to improve the tracking accuracy.The development process of the shipboard sun-photometer is introduced in detail,including the instrument's two-dimensional turntable,image tracking system,and measurement optical path.The function and working flow of each main structure of the instrument are described in detail with the two-dimensional turntable of the shipboard sun-photometer as the starting point.After that,the theoretical tracking

关 键 词：大气光学 气溶胶 太阳光度计 船载平台 渤海湾 

分 类 号：P412.4[天文地球—大气科学及气象学]