An investigation into the phytoplankton package effect on the chlorophyll-a specific absorption coefficient in Barra Bonita reservoir, Brazil

Autor(es)

Alcantara, Enner ^[1] ; Watanabe, Fernanda ^[1] ; Rodrigues, Thanan ^[1] ; Bernardo, Nariane ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ Unesp, Dept Cartog, Presidente Prudente, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: REMOTE SENSING LETTERS; v. 7, n. 8, p. 761-770, AUG 2016.
• Citações Web of Science: 8

Resumo

In this article, a possible phytoplankton package effect on the chlorophyll-a specific absorption coefficient (a{*}(phy)) is investigated. Two fieldworks were conducted in May and October 2014 in Barra Bonita (BB) reservoir. During the fieldworks, radiometric and water samples were obtained. From the radiometric data, the remote sensing reflectance (R-rs) were calculated and from the water samples the chlorophyll-a (chl-a) concentration, the phytoplankton absorption coefficient (a(phy)) and a{*}(phy) coefficient were obtained. The results show that for the first fieldwork (in May), the package effect was less perceived than in the second fieldwork (in October). In May, the package effect was more pronounced for the highest chl-a concentration (>200mgm(-3)) and for October all samples ranging from 263.20 to 797.80mgm(-3) were effected. Due to this effect, the bio-optical model development in order to estimate the chl-a concentration in a eutrophic environment such as the BB reservoir will face higher errors when the chl-a concentration were higher than 300mgm(-3). (AU)

• Processo FAPESP: 15/21586-9 - Re-parametrização do algoritmo quase-analítico (QAA) para estimativa das propriedades ópticas inerentes nos reservatórios do Rio Tietê
• Beneficiário: Enner Herenio de Alcântara
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 12/19821-1 - Parametrização de modelo bio-óptico para o estudo da concentração de clorofila-A ao longo de reservatórios em cascata
• Beneficiário: Enner Herenio de Alcântara
• Modalidade de apoio: Auxílio à Pesquisa - Regular