气溶胶对天空光偏振分布的影响
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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27μg/m~3增加到53μg/m~3再增加到103μg/m~3,PM2.5的质量浓度由9μg/m~3增加到28μg/m~3再增加到66μg/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。
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.
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.
引文
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[16] Cui Y,Chen X L,Chu J K,et al.Study on polarization pattern of full moonlight in clear sky[J].Acta Optica Sinica,2014,34(10):1012002.崔岩,陈小龙,褚金奎,等.晴朗天气下满月偏振模式的研究[J].光学学报,2014,34(10):1012002.
[17] Cui Y,Zhao J Y,Guan L,et al.Simulation and measurement of skylight polarization distribution in Yellow Sea[J].Acta Optica Sinica,2017,37(10):1001004.崔岩,赵金勇,关乐,等.黄海海域天空光偏振分布仿真与测试[J].光学学报,2017,37(10):1001004.
[2] Pust N J,Shaw J A.Wavelength dependence of the degree of polarization in cloud-free skies:simulations of real environments[J].Optics Express,2012,20(14):15559-15568.
[3] Guan G X,Yan L,Chen J B,et al.Analysing dynamic property of skylight polarization pattern graph[J].Computer Applications and Software,2009,26(12):179-181.关桂霞,晏磊,陈家斌,等.天空偏振模式图动态特性分析[J].计算机应用与软件,2009,26(12):179-181.
[4] Cai J,Gao J,Fan Z G,et al.The polarization characteristic research of aerosol particles under the humidity influence[J].Chinese Journal of Luminescence,2013,34(5):639-644.蔡嘉,高隽,范之国,等.湿度影响下的气溶胶粒子的偏振特性[J].发光学报,2013,34(5):639-644.
[5] Chu J K,Wang W,Cui Y,et al.Measurement for influence of aerosols on polarized sky radiance[J].Optics and Precision Engineering,2012,20(3):520-526.褚金奎,王威,崔岩,等.气溶胶对天空偏振辐射影响的测量[J].光学精密工程,2012,20(3):520-526.
[6] Liu Q,Guan L,Li B,et al.The impact of typical aerosol types on polarization sensitive spectral for bionic micro-nano polarization sensor[J].Key Engineering Materials,2014,609/610:988-992.
[7] Sun X M,Wang H H,Shen J,et al.Study on polarized light scattering by aerosol over ocean[J].Laser & Optoelectronics Progress,2016,53(4):040101.孙贤明,王海华,申晋,等.海洋背景下气溶胶的偏振光散射特性研究[J].激光与光电子学进展,2016,53(4):040101.
[8] Xuan J N,Sui C H,Yan B.The influence of aerosol concentration on the transmission characteristics of polarized light[J].Optical Instruments,2015,37(4):348-352.宣建楠,隋成华,鄢波.气溶胶浓度对偏振光传输特性的影响[J].光学仪器,2015,37(4):348-352.
[9] Dong X,Hu Y H,Xu S L,et al.Echoing characteristics of coherent lidar in different aerosol environments[J].Acta Optica Sinica,2018,38(1):0101001.董骁,胡以华,徐世龙,等.不同气溶胶环境中相干激光雷达回波特性[J].光学学报,2018,38(1):0101001.
[10] Li J,Duan M Z,Qin J.A coupled successive order scattering vector radiative transfer model for ocean-atmosphere system[J].Remote Sensing Technology and Application,2014,29(2):181-188,211.李姣,段民征,覃军.基于逐次散射法的海洋—大气矢量辐射传输模式[J].遥感技术与应用,2014,29(2):181-188,211.
[11] Mayer B.Radiative transfer in the cloudy atmosphere[J].The European Physical Journal Conferences,2009,1:75-99.
[12] Liu Q,Chu J K,Wang J,et al.Research and simulation analysis of atmospheric polarization properties under water cloud condition[J].Acta Optica Sinica,2014,34(3):0301004.刘琦,褚金奎,王兢,等.水云条件下大气偏振特性研究及其模拟分析[J].光学学报,2014,34(3):0301004.
[13] Emde C,Buras-Schnell R,Kylling A,et al.The libRadtran software package for radiative transfer calculations (Version 2.0)[J].Geoscientific Model Development,2016,8(12):10237-10303.
[14] Buras R,Mayer B.Efficient unbiased variance reduction techniques for Monte Carlo simulations of radiative transfer in cloudy atmospheres:the solution[J].Journal of Quantitative Spectroscopy and Radiative Transfer,2011,112(3):434-447.
[15] Hess M,Koepke P,Schult I.Optical properties of aerosols and clouds:the software package OPAC[J].Bulletin of the American Meteorological Society,1998,79(5):831-844.
[16] Cui Y,Chen X L,Chu J K,et al.Study on polarization pattern of full moonlight in clear sky[J].Acta Optica Sinica,2014,34(10):1012002.崔岩,陈小龙,褚金奎,等.晴朗天气下满月偏振模式的研究[J].光学学报,2014,34(10):1012002.
[17] Cui Y,Zhao J Y,Guan L,et al.Simulation and measurement of skylight polarization distribution in Yellow Sea[J].Acta Optica Sinica,2017,37(10):1001004.崔岩,赵金勇,关乐,等.黄海海域天空光偏振分布仿真与测试[J].光学学报,2017,37(10):1001004.
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