Bio-optical relationships for the northern Adriatic Sea

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The first three years of a time-series of marine bio-optical measurements performed from an oceanographic tower in the northern Adriatic Sea are used to derive empirical relationships for ocean colour applications in coastal waters. The site presents bio-optical characteristics pertaining to Case 1 and to Case 2 waters. Log linear relationships allow the diffuse attenuation coefficient for downwelling irradiance, KEd, at different wavelengths to be derived from its value at 490 nm. A local empirical algorithm making use of the remote sensing reflectance ratio Rrs(490)/Rrs(555) is shown to provide lower surface chlorophyll-a values (by a factor of 2 to 4) in the range 0.1-1.0 mg m−3 than the SeaWiFS OC2v4 algorithm.

Document Type: Research Article


Affiliations: Institute for Environment and Sustainability, Inland and Marine Waters Unit Joint Research Center of the European Commission Ispra Italy

Publication date: April 1, 2004

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