Advertisement

The Determination of the Diffuse Attenuation Coefficient of Sea Water Using the Coastal Zone Color Scanner

  • R. W. Austin
  • T. J. Petzold
Part of the Marine Science book series (MR, volume 13)

Abstract

An algorithm is presented for deriving the diffuse attenuation coefficient (K) of sea water from the ratio of inherent upwelling radiances at 443 and 550 nanometers. In situ spectroradiometric data from 88 oceanographic stations taken by U.S., French and Japanese investigators working in a wide variety of water types were used to develop empirical relationships between the attenuation coefficient and the upwelling radiance (or irradiance) ratio. The relationships for estimating K’s at 490 nm and 520 nm are presented along with the error of the estimate. Errors in the determination of K from in situ measurements are also discussed.

Since the estimates of the inherent sea surface radiances can be derived from Coastal Zone Color Scanner (CZCS) data by using an appropriate atmospheric correction algorithm, a method thus exists for remotely assessing the optical properties of the surface waters of the ocean. By applying the above relationships to the inherent radiances calculated from CZCS data the attenuation coefficients for an entire CZCS scene may be rapidly obtained. An example is presented of an image representing the K (490) computed from CZCS data together with concurrent surface observations for comparison. The image shows the nature and scale of the variations of the optical properties of the coastal waters.

Keywords

Attenuation Coefficient Light Field Surface Radiance Ocean Color JAPANESE Island 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Duntley, S.Q., Austin, R.W., Wilson, W.H., Edgerton, C.F. and Moran, M.E., 1974, “Ocean Color Analysis”, Visibility Laboratory of the Scripps Institution of Oceanography Report S10 Ref. 74–10.Google Scholar
  2. Jerlov, N.G., 1976, “Marine Optics”, (Elsevier Scientific Publishing Co., New York, 1976) Chapt. 10, 132–137.Google Scholar
  3. Morel, A., 1973, “Measurement of Spectral and Total Radiant Flux,” in Data Report, SCOR Discoverer Expedition May 1970, J.E. Tyler, Ed., S10 Ref. 73–16.Google Scholar
  4. Morel, A., 1974, “Optical Properties of Pure Water and Pure Sea Water,” in Optical Aspects of Oceanography, Jerlov, N.G. and Steevan Nielsen, E., Eds. (Academic Press, New York, 1974 ) Chapt. 1.Google Scholar
  5. Morel, A. and Caloumenos, L., 1973, “Measure d’Eclairments Sousmarins de Photons et Analyse Spectrale,” Centre Rech. Oceanogr. Villefranche-sur-Mer, Rapp. 11.Google Scholar
  6. Morel, A. & Prieur, L., 1976, “Irradiation Journaliere en Surface et Mesure des Eclairments sous Marins,” 1–256. In Resultats de la campagne CINECA 5 (Groupe Mediprod), Sect. 1–1–10, Publ CNEXOGoogle Scholar
  7. Morel, A. and Prieur, L., 1977, “Analysis of Variations in Ocean Color,” Limnology and Oceanography, 22 (4), 709–722.CrossRefGoogle Scholar
  8. Okami, N., Kishino, M. and Sughihara, S., 1978, “Measurements of Spectral Irradiance in the Seas around the Japanese Islands,” Tech. Rpt. No. 2 (Feb. 1978 ), Physical Oceanography Lab., The Institute of Physical and Chemical Research.Google Scholar
  9. Preisendorfer, R.W., 1961, “Application of Radiative Transfer Theory to Light Measurements in the Sea,” IUGG/IAPO Symposium on Radiant Energy in the Sea, Helsinki, 4–5 Aug. 1960. Monograph No. 10, 83–91.Google Scholar
  10. Smith, R.C. and Baker, K.S., 1978a, “Optical Classification of Natural Waters,” Limnology and Oceanography, 32 (2), 260–267.CrossRefGoogle Scholar
  11. Smith, R.C. and Baker, K.S., 1978b, “The Bio-Optical State of Ocean Waters and Remote Sensing,” Limnology and Oceanography, 32 (2), 247–259.CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1981

Authors and Affiliations

  • R. W. Austin
    • 1
  • T. J. Petzold
    • 1
  1. 1.Visibility LaboratoryScripps Institution of OceanographyLa JollaUSA

Personalised recommendations