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Provedor de dados:  ArchiMer
País:  France
Título:  Evaluation of empirical and semi-analytical chlorophyll algorithms in the Ligurian and North Tyrrhenian Seas
Autores:  Lapucci, Chiara
Rella, Marina Ampolo
Brandini, Carlo
Ganzin, Nicolas
Gozzini, Bernardo
Maselli, Fabio
Massi, Luca
Nuccio, Caterina
Ortolani, Alberto
Trees, Charles
Data:  2012-09
Ano:  2012
Palavras-chave:  Chlorophyll
Moderate resolution imaging spectroradiometer
Tyrrhenian Sea
Ligurian Sea
Resumo:  The estimation of chlorophyll concentration in marine waters is fundamental for a number of scientific and practical purposes. Standard ocean color algorithms applicable to moderate resolution imaging spectroradiometer (MODIS) imagery, such as OC3M and MedOC3, are known to overestimate chlorophyll concentration ([CHL]) in Mediterranean oligotrophic waters. The performances of these algorithms are currently evaluated together with two relatively new algorithms, OC5 and SAM_LT, which make use of more of the spectral information of MODIS data. This evaluation exercise has been carried out using in situ data collected in the North Tyrrhenian and Ligurian Seas during three recent oceanographic campaigns. The four algorithms perform differently in Case 1 and Case 2 waters defined following global and local classification criteria. In particular, the mentioned [CHL] overestimation of OC3M and MedOC3 is not evident for typical Case 1 waters; this overestimation is instead significant in intermediate and Case 2 waters. OC5 and SAM_LT are less sensitive to this problem, and are generally more accurate in Case 2 waters. These results are finally interpreted and discussed in light of a possible operational utilization of the [CHL] estimation methods. (C) 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.JRS.6.063565]
Tipo:  Text
Idioma:  Inglês

Editor:  Spie-soc Photo-optical Instrumentation Engineers
Formato:  application/pdf
Fonte:  Journal Of Applied Remote Sensing (1931-3195) (Spie-soc Photo-optical Instrumentation Engineers), 2012-09 , Vol. 6 , N. 1
Direitos:  2012 Society of Photo-Optical Instrumentation Engineers

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