光学学报, 2019, 39 (6): 0601001, 网络出版: 2019-06-17
气溶胶对天空光偏振分布的影响 下载: 1287次
Effect of Aerosol on Polarization Distribution of Sky Light
摘要
研究了气溶胶对大气偏振分布的影响。基于蒙特卡罗法的矢量辐射传输模式,对不同气溶胶条件下的偏振分布模式进行了仿真。利用图像式测试系统,对实际大气条件的偏振模式进行了测试,分析了气溶胶质量浓度变化对偏振模式的影响。结果表明,偏振度受气溶胶质量浓度的影响较大,随着气溶胶质量浓度的升高,偏振度不断变小。当PM10的质量浓度由27 μg/m 3增加到53 μg/m 3再增加到103 μg/m 3,PM2.5的质量浓度由9 μg/m 3增加到28 μg/m 3再增加到66 μg/m 3时,最大偏振度值平均减小了约25%。气溶胶对偏振方位角几乎没有影响,偏振方位角的分布稳定。
Abstract
This study investigates the effect of aerosol on the polarization distribution of the atmosphere. The polarization distribution patterns under different aerosol conditions are simulated and studied based on the vector radiation transmission mode of the Monte Carlo method. An image-based test system is used to test the polarization pattern under an actual atmospheric condition. The effect of aerosol mass concentration on the polarization pattern is analyzed. The results reveal that with the increase of aerosol mass concentration, the degree of polarization decreases, indicating that the aerosol mass concentration considerably affects the degree of polarization. When the mass concentration of PM10 increases from 27 μg/m 3 to 53 μg/m 3 and then to 103 μg/m 3 and that of PM2.5 increases from 9 μg/m 3 to 28 μg/m 3 and then to 66 μg/m 3, the maximum degree of polarization decreases by an average of 25%. In contrast, aerosol slightly affects the angle of polarization, and thus the distribution of polarization angle is stable.
崔岩, 张西光, 周鑫昌, 刘亚飞, 褚金奎. 气溶胶对天空光偏振分布的影响[J]. 光学学报, 2019, 39(6): 0601001. Yan Cui, Xiguang Zhang, Xinchang Zhou, Yafei Liu, Jinkui Chu. Effect of Aerosol on Polarization Distribution of Sky Light[J]. Acta Optica Sinica, 2019, 39(6): 0601001.