Optical properties of inorganic suspended solids and their influence on ocean colour remote sensing in highly turbid coastal waters
The influence of the optical properties of inorganic suspended solids (ISS) on in-water algorithms was evaluated using an optical model in highly turbid coastal water, whose ISS concentration reached several hundred grams per cubic metre. The measurements were conducted in the upper
Gulf of Thailand. The backscattering coefficient of the ISS was calculated using the Lorenz–Mie scattering theory. On the basis of the measurement, the ISS size distribution was parameterized as a function of ISS concentration, and both the spherical and non-spherical particle shape
models were evaluated. For ISS concentrations of 10 g m−3, an estimate of the chlorophyll-a (chl-a) concentration within a factor of 2 on a logarithmic scale is possible in a [chl-a] range of 4–30 mg m−3. The differential coefficient
of remote sensing reflectance was calculated to evaluate its respective sensitivities for chl-a and ISS concentrations. The use of radiometric data at 670 nm (700–900 nm) is valid for in-water algorithms used to estimate chl-a (ISS) concentration in highly turbid coastal
waters.
Document Type: Research Article
Affiliations: 1: Interdisciplinary Graduate School of Medicine and Engineering, University of Yamanashi, Kofu, 400-8511, Japan 2: School of High Technology for Human Welfare, Tokai University, Numazu, 410-0395, Japan 3: Department of Marine Science, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand 4: Department of Aquatic Science, Faculty of Science, Burapha University, Chonburi, 20131, Thailand
Publication date: 10 December 2011
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