Analysis OF Ocean Optical Data II

Raymond C. Smith; Karen S. Baker

doi:10.1117/12.964220

7 August 1986 Analysis OF Ocean Optical Data II

Raymond C. Smith, Karen S. Baker

Proceedings Volume 0637, Ocean Optics VIII; (1986) https://doi.org/10.1117/12.964220
Event: 1986 Technical Symposium Southeast, 1986, Orlando, United States

Abstract

The accurate estimation of the diffuse attenuation coefficient, K(λ,z), over a wide range of space/time scales is essential for the solution of a number of scientific and operational problems. In order to obtain shipboard estimates of K over large areas rapidly, it is necessary to make optical measurements quickly in all environmental conditions. Optical estimates of apparent optical properties under adverse environmental conditions require appropriate corrections to obtain suitable accuracies. We have developed techniques to correct spectral irradiance data for shadowing due to the ship's presence. This analysis makes use of contemporaneous above water spectral irradiance measurements, of a rough atmospheric model for the estimation of global transmittance through the air-water interface as a function of solar zenith angle, and of bio-optical models. The presence of a reasonably homogeneous upper mixed layer is assumed. By comparison with bio-optical model calculations, with Monte Carlo computations and with data obtained under optimum environmental conditions, these techniques provide improved spectral K data. Discussions of the photosynthetically active radiation are also presented. Limiting values of optical properties, including K(λ) and K_par, are explored with respect to the maximum penetration of radiant energy through ocean waters.

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Raymond C. Smith and Karen S. Baker "Analysis OF Ocean Optical Data II", Proc. SPIE 0637, Ocean Optics VIII, (7 August 1986); https://doi.org/10.1117/12.964220

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