A New Radiative Transfer Method for Solar Radiation in a Vertically Internally Inhomogeneous Medium
A New Radiative Transfer Method for Solar Radiation in a Vertically Internally Inhomogeneous Medium
复制标题
太阳辐射在垂直内部非均匀介质中的新辐射传输方法
DOI：
10.1175/jas-d-17-0104.1
复制
发表时间：
2018
影响因子：
3.1
通讯作者：
Shi Yi Ning
中科院分区：
文献类型：
--
作者：
Zhang Feng;Yan Jia Ren;Li Jiangnan;Wu Kun;Iwabuchi Hironobu;Shi Yi Ning
摘要太阳光谱辐射问题是在一个基于层的模型中考虑的，每个介质(云、海洋或气溶胶层)的散射和吸收平行于平面，并且假定光学性质在垂直方向上是不均匀的。提出了一种新的辐射传输(RT)方法来处理太阳光谱辐射模型中各层光学性质的垂直不均匀变化。该方法使用标准摄动方法来考虑云和雪在垂直方向上的不均匀RT效应。系统地研究了新的非均匀RT解在理想介质和现实云雪介质中的精度。对于理想介质，应用均匀解计算的反射和吸收的相对误差随着光学厚度的增加而增大，可以超过20%。然而，在大多数情况下，应用非均匀RT解时的相对误差限制在4%以内。观测表明，层积云是一种...
AbstractThe problem of solar spectral radiation is considered in a layer-based model, with scattering and absorption parallel to the plane for each medium (cloud, ocean, or aerosol layer) and optical properties assumed to be vertically inhomogeneous. A new radiative transfer (RT) method is proposed to deal with the variation of vertically inhomogeneous optical properties in the layers of a model for solar spectral radiation. This method uses the standard perturbation method to include the vertically inhomogeneous RT effects of cloud and snow. The accuracy of the new inhomogeneous RT solution is investigated systematically for both an idealized medium and realistic media of cloud and snow. For the idealized medium, the relative errors in reflection and absorption calculated by applying the homogeneous solution increase with optical depth and can exceed 20%. However, the relative errors when applying the inhomogeneous RT solution are limited to 4% in most cases. Observations show that stratocumulus clouds a...