The Transfer of Solar Irradiance Through Inhomogeneous Turbid Atmospheres Evaluated by Eddington's Approximation
The Transfer of Solar Irradiance Through Inhomogeneous Turbid Atmospheres Evaluated by Eddington's Approximation
复制标题
通过爱丁顿近似评估太阳辐照度通过不均匀浑浊大气的传输
DOI：
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发表时间：
1970
期刊：
影响因子：
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通讯作者：
J. Weinman
中科院分区：
文献类型：
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作者：
E. Shettle;J. Weinman
摘要利用爱丁顿近似计算了通过由几个不同的，虽然内部均匀的层组成的大气的辐照度，作为太阳天顶角的函数，单散射的散射，相函数的不对称因子，和下垫面的散射。单层大气的计算结果与更精确的计算结果在百分之几的范围内一致。计算了几种垂直非均匀三层模式大气的辐照度。考虑了垂直不均匀结构引起的影响。注意，例如，大气内的辐照度可以大于入射到大气上的辐照度，因为辐射可以部分地被捕获在大气内。爱丁顿近似提供了一种方法，可以快速计算实际非均匀大气中的辐照度，精度为百分之几。
Abstract Eddington's approximation was employed to compute the irradiances passing through atmospheres consisting of several different, albeit internally homogeneous, layers, as a function of solar zenith angle, albedo for single scatering, the asymmetry factor of the phase function, and the albedo of the underlying surface. Results computed for a single layer atmosphere were found to agree with more exact computations within a few percent. Irradiances within several vertically inhomogeneous three-layer model atmospheres were computed. Effects caused by the vertically inhomogeneous structure are considered. It is noted, for example, that the irradiance within an atmosphere can be greater than that incident upon the atmosphere bemuse radiation may he partially trapped within the atmosphere. The Eddington approximation affords a means to rapidly compute irradiances within realistic inhomogeneous atmospheres with an accuracy of several percent.