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Applied Optics

Applied Optics


  • Vol. 23, Iss. 20 — Oct. 15, 1984
  • pp: 3697–3704

Combined solar aureole and solar beam extinction measurements. 2: Studies of the inferred aerosol size distributions

N. T. O’Neill and John R. Miller  »View Author Affiliations

Applied Optics, Vol. 23, Issue 20, pp. 3697-3704 (1984)

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Inversions have been performed separately on spectral solar beam extinction data (0.4–1.0 μm) and on solar aureole scattering data (scattering angle ≲13°) to derive aerosol size distributions over the radius range of sensitivity appropriate to each inversion methodology. The bimodal size distributions derived from the two optical data types were normally found to be consistent in the region of overlapping radius. In one example, however, the presence of an independent absorber was postulated to bring the extinction and the scattering results into agreement. The derived aerosol particle size distributions were substituted into a Mie code to compute a scattering phase function which was then used in a radiative transfer model (discrete ordinate method) in order to compare calculations of sky radiance at large angles from the sun with radiometer field data. Data analysis illustrates the importance of the small-particle modal feature and of atmopsheric absorption to obtain consistency between extinction, aureole, and sky radiance data.

© 1984 Optical Society of America

Original Manuscript: December 29, 1983
Published: October 15, 1984

N. T. O’Neill and John R. Miller, "Combined solar aureole and solar beam extinction measurements. 2: Studies of the inferred aerosol size distributions," Appl. Opt. 23, 3697-3704 (1984)

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