The Astronomical Journal ( IF 5.3 ) Pub Date : 2021-08-26 , DOI: 10.3847/1538-3881/ac0c76 Xiaochuan Liu , Keyong Zhu , Jiang Shao , Yong Huang
Quantitative calculation of reflected polarized light from planets is of great significance to interpret the polarimetric observations of planetary atmospheres. In this work, we propose a lattice Boltzmann (LB) scheme for polarized radiative transfer in planetary atmospheres. The LB scheme obtains the Stokes vector through the vector LB equation performing simple collision and streaming processes. The vector radiative transfer equation is rigorously derived from the vector LB equation via the Maxwell iteration technique. Polarized radiative transfer of a single point on the planetary surface with Rayleigh and Mie scattering atmospheres are first accurately solved by our LB scheme. Afterward, we systematically investigate the disk-integrated polarization of finite and semi-infinite, conservative and nonconservative Rayleigh scattering planetary atmospheres. The disk-integrated phase curves of the Stokes parameters and degree of polarization and spherical and geometric albedos are produced, which are in good agreement with the benchmark results for different cases. The numerical results indicate that our LB scheme is efficient and accurate for polarized radiative transfer in planetary atmospheres. Our LB scheme is expected to provide a competitive numerical tool to interpret the polarimetric observations of planetary atmospheres.
中文翻译:
行星大气中偏振辐射传输的格子玻尔兹曼方案
行星反射偏振光的定量计算对于解释行星大气的偏振观测具有重要意义。在这项工作中,我们提出了一种用于行星大气中极化辐射传输的晶格玻尔兹曼 (LB) 方案。LB 方案通过向量 LB 方程执行简单的碰撞和流处理来获得斯托克斯向量。矢量辐射传递方程是通过麦克斯韦迭代技术从矢量 LB 方程严格推导出来的。我们的 LB 方案首先准确地解决了具有瑞利和米氏散射大气的行星表面单点的偏振辐射传输。然后,我们系统地研究了有限和半无限的盘集成极化,保守和非保守瑞利散射行星大气。产生了斯托克斯参数和偏振度以及球面和几何反照率的圆盘积分相位曲线,与不同情况下的基准结果非常吻合。数值结果表明,我们的 LB 方案对于行星大气中的极化辐射传输是有效和准确的。我们的 LB 方案有望提供一种有竞争力的数值工具来解释行星大气的极化观测。数值结果表明,我们的 LB 方案对于行星大气中的极化辐射传输是有效和准确的。我们的 LB 方案有望提供一种有竞争力的数值工具来解释行星大气的极化观测。数值结果表明,我们的 LB 方案对于行星大气中的极化辐射传输是有效和准确的。我们的 LB 方案有望提供一种有竞争力的数值工具来解释行星大气的极化观测。