Scattering by nonspherical particles of size comparable to wavelength - A new semi-empirical theory and its application to tropospheric aerosols

Details Scattering by nonspherical particles of size comparable to wavelength - A new semi-empirical theory and its application to tropospheric aerosols Scattering by nonspherical particles of size comparable to wavelength - A new semi-empirical theory and its application to tropospheric aerosols

Apr 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jats...37..868p&link_type=abstract

Journal of the Atmospheric Sciences, vol. 37, Apr. 1980, p. 868-881.

Physics

76

Aerosols, Electromagnetic Radiation, Light Scattering, Particle Size Distribution, Semiempirical Equations, Tropospheric Scattering, Atmospheric Boundary Layer, Electromagnetic Interactions, Radiative Transfer, Random Processes, Refractivity

Scientific paper

A semiempirical theory is developed which is based on simple physical principles and comparisons with laboratory measurements. The ultimate utility of this approach rests on its ability to successfully reproduce the observed single-scattering phase function for a wide variety of particle shapes, sizes and refractive indices. This approximate theory is developed for evaluating the interaction of randomly oriented, nonspherical particles with the total intensity component of electromagnetic radiation. Mie theory is used when the particle size parameter x (ratio of particle circumference to wavelength) is less than some upper bound xzero (about 5). For x greater than xzero, the interaction is divided into three components: diffraction, external reflection and transmission. The application of the theory is illustrated by considering the influence of the shape of tropospheric aerosols on their contribution to the earth's global albedo.

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