Scattering of emitted radiation from inhomogeneous and nonisothermal layers

Details Scattering of emitted radiation from inhomogeneous and nonisothermal layers Scattering of emitted radiation from inhomogeneous and nonisothermal layers

Mar 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jqsrt..21..279b&link_type=abstract

Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 21, Mar. 1979, p. 279-292.

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Atmospheric Scattering, Nonisothermal Processes, Radiative Transfer, Scattering Functions, Thermal Radiation, Atmospheric Models, Black Body Radiation, Inhomogeneity, Invariant Imbeddings, Isothermal Layers, Optical Thickness, Planetary Atmospheres, Temperature Profiles, Terrestrial Radiation

Scientific paper

A parametric study is performed for the exiting monochromatic intensities scattered from finite plane-parallel inhomogeneous layers that are driven solely by a distribution of thermal sources. Intensities are obtained by invariantly imbedding the standard and thermal scattering functions. The single-scattering albedo and the Henyey-Greenstein phase-function parameter are varied independently, and both linear and exponential profiles are considered. Linear temperature profiles are used, including temperature inversions. The resulting intensities, as a function of the direction cosine of propagation, are discussed from a remote-sensing point of view. For an isothermal and homogeneous medium, the gross characteristics of the exiting intensity, represented by its overall slope, mean value (magnitude), and an interior maximum value, can be related to the total optical depth, single-scattering albedo, and phase function, respectively. For a homogeneous medium, linearly decreasing (in the line of sight) temperature profiles tend to obscure the phase-function information and decrease the apparent optical depth. On the other hand, linearly increasing temperature profiles tend to retain phase-function information and increase the apparent optical depth. Temperature inversion profiles give intensities very similar to those for purely linear profiles.

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