Coastal optical water type 2: modeling and minerogenic scattering

Robert Hans Stavn; Alan D. Weidemann

doi:10.1117/12.266476

6 February 1997 Coastal optical water type 2: modeling and minerogenic scattering

Robert Hans Stavn, Alan D. Weidemann

Proceedings Volume 2963, Ocean Optics XIII; (1997) https://doi.org/10.1117/12.266476
Event: Ocean Optics XIII, 1996, Halifax, Nova Scotia, Canada

Abstract

We are carrying out parameterizations of Type 1 oceanic waters to Type 2 coastal waters and determining the effects of minerogenic matter on attempts to retrieve the backscattering coefficient from radiance and irradiance data. This new parameterization involves the incorporation of suspended minerogenic matter into our ocean optical models. The deeply 'lobed' backscattering portion of the volume scattering function for suspended minerogenic matter in coastal Type 2 waters has a profound effect on the upwelling radiance signal and therefore on algorithms that utilize upwelling radiances. Clay-like minerogenic matter can create a 200 percent overestimate of the backscattering coefficient for Air Mass 1 conditions and a 50 percent underestimate of the backscattering coefficient under Air Mass 2 conditions in the surface layers of coastal waters. Quartz-like minerogenic matter, range of diameters 60-360 micrometers for size distributions typical of California and Florida, stirred up with and added to suspended clay-like particles, will radically alter further the backscattering shape factor and the error of inversion of the backscattering coefficient. In this case a nearly 30 percent error of underestimate results in the surface layers that then increases with depth to more than a 15 percent overestimate coefficient under Air Mass 1 conditions. There is then a 20 percent overestimate at all depths under Air Mass 2 conditions.

Citation Download Citation

Robert Hans Stavn and Alan D. Weidemann "Coastal optical water type 2: modeling and minerogenic scattering", Proc. SPIE 2963, Ocean Optics XIII, (6 February 1997); https://doi.org/10.1117/12.266476

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