Vector Radiative Transfer in a Vertically Inhomogeneous Scattering and Emitting Atmosphere. Part Ⅱ: Coupling with Azimuthally Asymmetric Polarized Bidirectional Reflection over Oceans  

作　　者：Ziqiang ZHU Fuzhong WENG 

机构地区：[1]Chinese Academy of Meteorological Sciences,China Meteorological Administration,Beijing 100081 [2]University of Chinese Academy of Sciences,Beijing 100049 [3]CMA Earth System Modeling and Prediction Centre,China Meteorological Administration(CMA),Beijing 100081

出　　处：《Journal of Meteorological Research》2024年第5期923-936,共14页气象学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(U2142212 and U2242211),Hunan Provincial Natural Science Foundation of China(2021JC0009);National Key Research and Development Program of China[2019QZKK(Qinghai Tibet KeKao)].

摘　　要：The reflection of ocean surface is often assumed azimuthally symmetric in the previous vector discrete ordinate radiative transfer(VDISORT)and many other radiative transfer solvers.This assumption can lead to obvious errors in the simulated radiances.In this study,the vector radiative transfer equation is solved with a polarized bidirectional reflection distribution function(pBRDF)for computing the surface-leaving radiation from the lower boundary.An azimuthally asymmetric pBRDF model at visible and infrared bands over oceans is fully coupled with the updated VDISORT model.The radiance at the ocean surface is combined with the contributions of atmospheric scattering and surface properties.It is shown that the radiance at the ocean surface also exhibits a strong angular dependence in the Stokes vector and the magnitudes of I.Q.and V increase for a larger azimuthal dependence of pBRDF.In addition,the solar position affects the peaks of sun glitter pattern,thus modulating the signal magnitudes and the angular distributions.As ocean wind increases,the reflection weakens with reduced magnitudes of Stokes parameters and lessvarying angular distributions.

关 键 词：radiative transfer polarized bidirectional reflection distribution function(pBRDF) discrete ordinate vector discrete ordinate radiative transfer(VDISORT) 

分 类 号：P407[天文地球—大气科学及气象学]