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    A Method for Determining the Single Scattering Albedo of Clouds Through Observation of the Internal Scattered Radiation Field

    Source: Journal of the Atmospheric Sciences:;1981:;Volume( 038 ):;issue: 009::page 2031
    Author:
    King, Michael D.
    DOI: 10.1175/1520-0469(1981)038<2031:AMFDTS>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: A method is presented for determining the single scattering albedo of clouds at selected wavelengths in the visible and near-infrared wavelength regions. The procedure compares measurements of the ratio of the zenith to nadir propagating intensifies deep within a cloud layer with radiative transfer computations of the same. Analytic formulas are derived which explicitly show the dependence of the internal intensity ratio on ground albedo, optical depth, single scattering albedo and cloud asymmetry factor. The single scattering albedo and cloud asymmetry factor enter the solution in such a way that a similarity relationship exists between these two parameters. As a result, the accuracy with which the single scattering albedo can be determined is dictated by the accuracy with which the asymmetry factor can be estimated. A method of observation is described whereby aircraft measurements of the zenith and nadir propagating intensifies can be used to determine the similarity parameter as a function of wavelength. Since the fractional absorption of a cloud depends on the similarity parameter and not on the single scattering albedo and asymmetry factor separately, this poses no severe limitation to the method. An accurate knowledge of the ground albedo and total optical thickness of a cloud are unnecessary for a solution, provided one associates the wavelength for which the intensity ratio is a maximum with conservative scattering. Under this internal calibration approach, uncertainties in the ground albedo are very nearly compensated by uncertainties in the cloud optical thickness.
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      A Method for Determining the Single Scattering Albedo of Clouds Through Observation of the Internal Scattered Radiation Field

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4154182
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    contributor authorKing, Michael D.
    date accessioned2017-06-09T14:22:32Z
    date available2017-06-09T14:22:32Z
    date copyright1981/09/01
    date issued1981
    identifier issn0022-4928
    identifier otherams-18202.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4154182
    description abstractA method is presented for determining the single scattering albedo of clouds at selected wavelengths in the visible and near-infrared wavelength regions. The procedure compares measurements of the ratio of the zenith to nadir propagating intensifies deep within a cloud layer with radiative transfer computations of the same. Analytic formulas are derived which explicitly show the dependence of the internal intensity ratio on ground albedo, optical depth, single scattering albedo and cloud asymmetry factor. The single scattering albedo and cloud asymmetry factor enter the solution in such a way that a similarity relationship exists between these two parameters. As a result, the accuracy with which the single scattering albedo can be determined is dictated by the accuracy with which the asymmetry factor can be estimated. A method of observation is described whereby aircraft measurements of the zenith and nadir propagating intensifies can be used to determine the similarity parameter as a function of wavelength. Since the fractional absorption of a cloud depends on the similarity parameter and not on the single scattering albedo and asymmetry factor separately, this poses no severe limitation to the method. An accurate knowledge of the ground albedo and total optical thickness of a cloud are unnecessary for a solution, provided one associates the wavelength for which the intensity ratio is a maximum with conservative scattering. Under this internal calibration approach, uncertainties in the ground albedo are very nearly compensated by uncertainties in the cloud optical thickness.
    publisherAmerican Meteorological Society
    titleA Method for Determining the Single Scattering Albedo of Clouds Through Observation of the Internal Scattered Radiation Field
    typeJournal Paper
    journal volume38
    journal issue9
    journal titleJournal of the Atmospheric Sciences
    identifier doi10.1175/1520-0469(1981)038<2031:AMFDTS>2.0.CO;2
    journal fristpage2031
    journal lastpage2044
    treeJournal of the Atmospheric Sciences:;1981:;Volume( 038 ):;issue: 009
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
    yabeshDSpacePersian