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Some relationships between Secchi depth and inherent optical properties of natural watersRelationships between the inherent and optical properties of the ocean (Gorden et al., 1975 and Preisendorfer, 1961) are combined with the Duntley-Preisendorfer equation to show the dependence of these properties on the depth at which a Secchi disk disappears from view. An expression relating the Secchi depth to the limiting contrast of the disk is derived in terms of the average beam attenuation coefficient, the average diffuse attenuation coefficient for downwelling irradiance, the albedo of the disk, and the reflectance functions at the Secchi depth and just below the surface. It is shown that combining Secchi depth observations with other optical properties yields significant information about the constituents of the medium.
Document ID
19790027730
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Gordon, H. R.
(Miami Univ. Coral Gables, FL, United States)
Wouters, A. W.
(Miami, University Coral Gables, Fla., United States)
Date Acquired
August 9, 2013
Publication Date
November 1, 1978
Publication Information
Publication: Applied Optics
Volume: 17
Subject Category
Oceanography
Accession Number
79A11743
Funding Number(s)
CONTRACT_GRANT: NAS5-22963
CONTRACT_GRANT: NOAA-04-6-158-44104
Distribution Limits
Public
Copyright
Other

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