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Analysis of ocean color spectra (II)

Effect of reflected sky light

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Abstract

A method for evaluating the radiance due to sky light reflected by the sea surface and radiance emerging from the sea is described. The calculation is made as a function of the sun altitude, sky condition and sea state for varying optical properties of sea water. As a result of the contribution of reflected sky light, the shape of the spectral distribution for radiance just below the surface is considerably distorted above the surface, especially when chlorophyll concentrations are high. Special attention is paid to the ratio of radiance emerging from the sea to total upwelling radiance at the wavelength of 670 nrn. The variation in the ratio with wind-speed is small and the ratio decreases with increase in the atomospheric turbidity factor.

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References

  • Austin, R. W. (1974a): Inherent spectral radiance signatures of the ocean surface. Scripps Inst. Oceanogr. SIO Ref. 74-10, Sect. 2, 1–20.

  • Austin, R. W. (1974b): The remote sensing of spectral radiance from below the ocean surface.In, Optical Aspects of Oceanography, ed. byN. G. Jerlov andE. Steemann-Nielsen, Academic press, London, pp. 317–344.

    Google Scholar 

  • Burt, W. V. (1954): Albedo over wind-roughened water. J. Meteorol.,11, 283–290.

    Google Scholar 

  • Cox, C. andW. Munk (1954): Statistics of the sea surface derived from sun glitter. J. Mar. Res.,13, 198–227.

    Google Scholar 

  • Gordon, J.I. (1969): Directional radiance (luminance) of the sea surface. Scripps Inst. Oceanogr. SIO Ref. 69-20, 1–50.

    Google Scholar 

  • Neville, R. A. andJ. F. R. Gower (1977): Passive remote sensing of phytoplankton via chlorophyllα fluorescence. J. Geophys. Res.,82, 3487–3493.

    Google Scholar 

  • Okami, N. (1977): Studies of ocean color spectrum. Bull. Coast. Oceanogr.,15, 56–66 (in Japanese).

    Google Scholar 

  • Okami, N., M. Kishino, S. Sugihara andS. Unoki (1982): Analysis of ocean color spectra (I)-calculation of irradiance reflectance-. J. Oceanogr. Soc. Japan,38, 208–214.

    Google Scholar 

  • Pendorf, R. (1957): Table of the refractive index for standard air and the Rayleigh scattering coefficient for the spectral atmospheric optics. J. Opt. Soc. Amer.,47, 176–183.

    Google Scholar 

  • Taylor, A. H. andG. P. Kerr (1941): The distribution of energy in the visible spectrum of daylight. J. Opt. Soc. Amer.,31, 3–8.

    Google Scholar 

  • Thekaekara, M. P. andA. J. Drummond (1971): Standard values for the solar constant and its spectral components. Nature Phys. Sci.,229, 6–9.

    Google Scholar 

  • Yasuoka, Y., Y. Iikura andT. Miyazaki (1978): Quantitative description and analysis of remotely sensed water quality distribution.In, Proc. of 12th Inter. Symp. on Remote Sensing of Environment. pub. by Environ. Res. Inst. of Mich., Ann Arbor, Mich., pp. 1309–1318.

    Google Scholar 

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Okami, N., Kishino, M., Sugihara, S. et al. Analysis of ocean color spectra (II). Journal of the Oceanographical Society of Japan 38, 300–306 (1982). https://doi.org/10.1007/BF02114534

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  • DOI: https://doi.org/10.1007/BF02114534

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