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Proceedings Paper

Downwelling irradiance fluctuations in the small-angle approximation
Author(s): Jerry Alan Tessendorf
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Paper Abstract

Mean and rrns fluctuations of downwelling solar irradiance below a rough ocean surface have been modelled using the small-angle approximation for the in-water radiance distribution. For comparison, a ray-trace approach has also been used to calculate the fluctuation statistics in the limit of no scattering. The mean irradiance decays rapidly near the surface, and at a sufficiently large depth (determined by the water optical properties) is within a few percent of the irradiance for a flat ocean surface. Although rims fluctuations decay with depth as well, their magnitude relative to the mean irradiance reaches a nonzero asymptotic value which depends on the sun position, optical properties, and surface roughness.

Paper Details

Date Published: 1 September 1990
PDF: 10 pages
Proc. SPIE 1302, Ocean Optics X, (1 September 1990); doi: 10.1117/12.34724
Show Author Affiliations
Jerry Alan Tessendorf, Texas A&M Univ. (United States)

Published in SPIE Proceedings Vol. 1302:
Ocean Optics X
Richard W. Spinrad, Editor(s)

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