Study On The Polarization Characteristics Of Aerosol Scattering

Aerosols plays an important role in the atmosphere.The content and type of aerosols not only have an impact on human health,and they can also be used to predict the weather.The effects of surface reflection model and atmospheric visibility on the scattering polarization characteristics of aerosols are considered for the first time.Aerosol type in the atmosphere shape are various,which can be roughly divided into spherical and non-spherical.Therefore,the research focuses on two aspects.Firstly,the scattering polarization property of spherical aerosol are studied.By comparing the scattering polarization property of spherical aerosols under single surface and coupled surface,it can be concluded that:?1?The scattering radiation intensity and linear polarization degree of single scattering of the two surface reflection models are equal;?2?The total scattered radiation intensity and polarization degree on coupling surface are always greater than single surface;?3?The contribution of single scattering to total scattering is always greater than that of coupled surface.By comparing the scattering polarization property of spherical aerosols in low-visibility and high-visibility weather,it is concluded that:?1?The contribution of single scattering to total scattering is always lower than that of high visibility;?2?In a low visibility weather,single scattering and total scattered radiation intensity and polarization degree vary irregularly at downward.Secondly,the scattering polarization property of non-spherical aerosol are studied.:?1?The aerosol type have an effect on the I at downward,and the change occurred at the zenith angle;?2?The downward of 1^st polarization degree of the non-spherical aerosol is no greater than total scattering polarization degre;?3?Similar to spherical aerosol,the contribution of single scattering relative to total scattering is always at downward greater than at upward,and the total scattered radiation intenisity is greater than the couple surface;?4?The intensity of aerosol scattering radiation and the degree of polarization increase with the increase of the transverse to longitudinal ratio,but the variation range is not very large.