光学学报, 2017, 37 (7): 0701001, 网络出版: 2017-07-10
基于MAX-DOAS观测大气Ring效应的气溶胶光学参数反演
Retrieval of Aerosol Optical Parameters Based on Ring Effect Observed by MAX-DOAS
大气光学 大气Ring效应 多轴差分吸收光谱 气溶胶 非对称因子 atmospheric optics atmospheric Ring effect multi-axis differential optical absorption spectro aerosol asymmetry factor
摘要
Ring效应是指大气分子对太阳光的转动拉曼散射致使太阳光中夫琅禾费线变浅的现象。气溶胶能够改变光子在大气中的路径和大气散射性质,最终影响夫琅禾费线的填充程度,因此可以通过观测Ring效应强度获取气溶胶信息。分析了Ring效应对气溶胶光学参量(气溶胶光学厚度、单次散射反照率、非对称因子等)的敏感性,发展了一种结合大气辐射传输模型并利用地基多轴差分吸收光谱(MAX-DOAS)仪器观测的Ring效应获取气溶胶光学特性的新方法。将MAX-DOAS 反演结果和太阳光度计的观测结果进行了对比,两者一致性较好。研究表明,基于地基MAX-DOAS观测的Ring 效应可以实现气溶胶光学特性的探测。
Abstract
Ring effect is defined as the phenomenon that the depth of solar Fraunhofer lines shallows caused by solar rotational Raman scattering of sunlight. Aerosol can change the atmospheric light paths of photons and atmospheric scattering properties, and then influence the filling-in of Fraunhofer lines, so we can retrieve the aerosol information from the intensity of Ring effect. Sensitivity of the Ring effect to optical parameters of aerosol is analyzed, including aerosol optical depth, single scattering albedo and asymmetry factor. A new method for determining aerosol optical properties by ground-based multi-axis differential optical absorption spectroscopy (MAX-DOAS) observation and the atmospheric radiative transfer model is developed. The MAX-DOAS retrieval result is in good agreement with the measurement result from sun photometer. The study shows that the Ring effect observed by ground-based MAX-DOAS can be used to detect the aerosol properties.
牟福生, 李昂, 吴丰成, 谢品华, 王杨, 陈浩, 徐晋, 李素文. 基于MAX-DOAS观测大气Ring效应的气溶胶光学参数反演[J]. 光学学报, 2017, 37(7): 0701001. Mou Fusheng, Li Ang, Wu Fengcheng, Xie Pinhua, Wang Yang, Chen Hao, Xu Jin, Li Suwen. Retrieval of Aerosol Optical Parameters Based on Ring Effect Observed by MAX-DOAS[J]. Acta Optica Sinica, 2017, 37(7): 0701001.