Empirical SeaWiFS chlorophyll algorithm validation for the Mediterranean Sea

Fabrizio D'Ortenzio; Rosalia Santoleri; Salvatore Marullo; M. Ragni; Maurizio Ribera d'Alcala

doi:10.1117/12.411695

22 December 2000 Empirical SeaWiFS chlorophyll algorithm validation for the Mediterranean Sea

Fabrizio D'Ortenzio, Rosalia Santoleri, Salvatore Marullo, M. Ragni, Maurizio Ribera d'Alcala

Proceedings Volume 4172, Remote Sensing of the Ocean and Sea Ice 2000; (2000) https://doi.org/10.1117/12.411695
Event: Europto Remote Sensing, 2000, Barcelona, Spain

Abstract

A Mediterranean data set containing coincident in situ chlorophyll and Sea WiFS remote sensing reflectance was used to evaluate the performances of several ocean color empirical algorithms. The validation of the algorithms is based on a match up file of 63 coincident in situ and Sea WiFS measurements selected on the basis of a sequence of mask criteria that prevents the use of contaminated pixels. All the algorithms calibrated to global or non-Mediterranean data sets overestimate the chlorophyll concentration in the Mediterranean Sea for low values of chlorophyll-a concentration. A total pigment concentration algorithm based on a regression with Mediterranean data, proposed by Gitelson et al. For CZCS, gives good results for low chlorophyll concentrations but exhibits a scatter larger than OC2 for concentrations higher than 0.2 mg/m³. In this paper we propose a preliminary version of a new Mediterranean ocean color algorithm based on the OC2 functional form with coefficients estimated from a regression with our Mediterranean in situ data.

Citation Download Citation

Fabrizio D'Ortenzio, Rosalia Santoleri, Salvatore Marullo, M. Ragni, and Maurizio Ribera d'Alcala "Empirical SeaWiFS chlorophyll algorithm validation for the Mediterranean Sea", Proc. SPIE 4172, Remote Sensing of the Ocean and Sea Ice 2000, (22 December 2000); https://doi.org/10.1117/12.411695

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