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contributor authorZhang, Feng
contributor authorShen, Zhongping
contributor authorLi, Jiangnan
contributor authorZhou, Xiuji
contributor authorMa, Leiming
date accessioned2017-06-09T16:55:15Z
date available2017-06-09T16:55:15Z
date copyright2013/03/01
date issued2012
identifier issn0022-4928
identifier otherams-76504.pdf
identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4218959
description abstractlthough single-layer solutions have been obtained for the δ-four-stream discrete ordinates method (DOM) in radiative transfer, a four-stream doubling?adding method (4DA) is lacking, which enables us to calculate the radiative transfer through a vertically inhomogeneous atmosphere with multiple layers. In this work, based on the Chandrasekhar invariance principle, an analytical method of δ-4DA is proposed.When applying δ-4DA to an idealized medium with specified optical properties, the reflection, transmission, and absorption are the same if the medium is treated as either a single layer or dividing it into multiple layers. This indicates that δ-4DA is able to solve the multilayer connection properly in a radiative transfer process. In addition, the δ-4DA method has been systematically compared with the δ-two-stream doubling?adding method (δ-2DA) in the solar spectrum. For a realistic atmospheric profile with gaseous transmission considered, it is found that the accuracy of δ-4DA is superior to that of δ-2DA in most of cases, especially for the cloudy sky. The relative errors of δ-4DA are generally less than 1% in both the heating rate and flux, while the relative errors of δ-2DA can be as high as 6%.
publisherAmerican Meteorological Society
titleAnalytical Delta-Four-Stream Doubling–Adding Method for Radiative Transfer Parameterizations
typeJournal Paper
journal volume70
journal issue3
journal titleJournal of the Atmospheric Sciences
identifier doi10.1175/JAS-D-12-0122.1
journal fristpage794
journal lastpage808
treeJournal of the Atmospheric Sciences:;2012:;Volume( 070 ):;issue: 003
contenttypeFulltext


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