Recent measurements of the spectral backward-scattering coefficient in coastal waters

Robert A. Maffione; David R. Dana

doi:10.1117/12.266435

6 February 1997 Recent measurements of the spectral backward-scattering coefficient in coastal waters

Robert A. Maffione, David R. Dana

Proceedings Volume 2963, Ocean Optics XIII; (1997) https://doi.org/10.1117/12.266435
Event: Ocean Optics XIII, 1996, Halifax, Nova Scotia, Canada

Abstract

The backward scattering coefficient b_b was measured in various coastal waters with fixed-angle backscattering sensors developed by the authors. Measurements were made at four discrete wavelengths covering the spectral range 440 to 675 nm. A power law spectral dependence of b_b due to scattering by particles was investigated of the form b_b^p((lambda) ) equals b_b^p ((lambda) ₀) ((lambda) ₀/(lambda) )^(gamma , where the superscript p denotes particle scattering and (lambda) is the wavelength. The exponent (gamma) depends on the particle size distribution and composition of particles. Extensive measurements in Monterey Bay, California, showed that 0.1 <EQ (gamma) <EQ 1.1, where the lower values were in the clear, interior waters generally below 10 m. For the upper 10 m, 0.7 <EQ (gamma) <EQ 1.0, and (gamma) is congruent to 0.8. In the relatively clear Gulf of Mexico waters near Panama City, Florida, (gamma) for the upper 10 m was found to be in the range, 0.9 <EQ (gamma) <EQ 1.1, with (gamma) is congruent to 1.0. At dry Tortugas, which consists of clear coral reef water, 0.9 <EQ (gamma) <EQ 1.1, and (gamma) is congruent to 1.0. In the thick, green-brown waters of East Sound, Washington, 0 <EQ (gamma) <EQ 0.1, which thus were the most spectrally 'flat' waters measured.

Citation Download Citation

Robert A. Maffione and David R. Dana "Recent measurements of the spectral backward-scattering coefficient in coastal waters", Proc. SPIE 2963, Ocean Optics XIII, (6 February 1997); https://doi.org/10.1117/12.266435

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