Bio-Optical Properties of the Inner Continental Shelf off Santos Estuarine System, Southeastern Brazil, and their Implications for Ocean Color Algorithm Performance

Autor(es)

Carvalho, Melissa ^[1] ; Ciotti, Aurea Maria ^[2] ; Flores Gianesella, Sonia Maria ^[3] ; Prado Saldanha Correa, Flavia Marisa ^[3] ; Costa Perinotto, Rafael Riani ^[4]

Afiliação do(s) autor(es)

^[1] Univ Fed Santa Catarina, Ctr Ciencias Biol, Dept Ecol, BR-88010970 Florianopolis, SC - Brazil

^[2] Univ Sao Paulo, Ctr Biol Marinha, Inst Biociencias, BR-11600000 Sao Sebastiao, SP - Brazil

^[3] Univ Sao Paulo, Inst Oceanog, BR-05508120 Sao Paulo - Brazil

^[4] Univ Estadual Paulista, BR-11330900 Sao Vicente, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Brazilian Journal of Oceanography; v. 62, n. 2, p. 71-87, JUL 2014.
• Citações Web of Science: 1

Resumo

Optical characterizations of coastal water masses are important tools for a better understanding of physical and biochemical processes and aid the optimization of ocean color algorithms. In this study we present three optical classes of water observed during October/2005 and March/2006 on the inner continental shelf adjacent to Santos Bay (Brazil), based on remote sensing reflectance. ANOVA indicated a crescent estuarine influence in classes 1 to 3. Class 3 presented the highest chlorophyll-a and nutrient concentration and highest light absorption coefficients. Colored dissolved organic matter (CDOM) dominated the light absorption in all classes and was strongly correlated to salinity in October/2005 due to the influence of the La Plata plume. The results indicated that CDOM dynamics in the Santos inner shelf are very complex. The performance of global chlorophyll algorithms was significantly smaller for October/2005 than for March/2006. As inconsistent changes in light absorption spectra by phytoplankton were detected between samplings, the results show that future bio-optical algorithms for this region must be optimized preferentially considering CDOM optical parameters. (AU)

• Processo FAPESP: 03/09932-1 - A influência do complexo estuarino da Baixada Santista sobre o ecossistema da plataforma adjacente (ECOSAN)
• Beneficiário: Ana Maria Setubal Pires-Vanin
• Modalidade de apoio: Auxílio à Pesquisa - Programa PRONEX - Temático