@Article{MedeirosZoFrCoCeKa:2022:BiPrBr,
               author = "Medeiros, Thais Andrade Galv{\~a}o de and Zoffoli, Mar{\'{\i}}a 
                         Laura and Frouin, Robert and Cortivo, F{\'a}bio Dall and Cesar, 
                         Gabriel Moiano and Kampel, Milton",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Consiglio 
                         Nazionale delle Ricerche (CNR)} and {University California San 
                         Diego} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)}",
                title = "Bio-optical properties of the Brazilian Abrolhos Bank?s shallow 
                         coral-reef waters",
              journal = "Frontiers in Remote Sensing",
                 year = "2022",
               volume = "3",
                pages = "986013",
             keywords = "bio-optical properties, coral reefs, shallow water, Hyperspectral 
                         remote sensing, PRISMA.",
             abstract = "The Abrolhos Bank harbors the richest coral reef ecosystem in the 
                         South Atlantic Ocean. It exhibits unique geomorphologic 
                         structures, is localized in shallow depths, and is divided into 
                         two reef regions with an inner arc close to the coast (320 m 
                         depth) and an outer deeper arc (530 m depth). This study aims to 
                         describe some bio-optical properties of the Abrolhos Bank waters 
                         and to evaluate the performance of the inversion Hyperspectral 
                         Optimization Processing Exemplar (HOPE) model, developed to 
                         retrieve optical properties in shallow waters, in the region. To 
                         this end, measurements at 75 stations during two field campaigns 
                         conducted during the 2013 and 2016 wet seasons were analyzed, and 
                         the HOPE model was applied to both in situ remote sensing 
                         reflectance (Rrs) spectra and PRecursore IperSpettrale della 
                         Missione Applicativa (PRISMA) imagery. Significant differences in 
                         optical and biological properties were found between the two arcs. 
                         The empirical relationships between chlorophyll-a concentration 
                         (Chl-a) and absorption coefficient of phytoplankton at 440 nm 
                         (aphy(440)) diverged from Bricauds models, suggesting differences 
                         in phytoplankton diversity and cell size. In both arcs, total 
                         non-water absorption coefficient at 440 nm (aT-w(440)) was 
                         dominated by colored dissolved organic matter (CDOM) by ~60%. 
                         Absorption coefficient by CDOM (acdom) presented a higher 
                         variability within the outer arc, with the lowest contribution 
                         from non-algal particles (NAPs), and the spectral slopes of aCDOM 
                         resembled those of the inner arc. The spectral slopes of the NAP 
                         absorption coefficient suggested a dominance by organic rather 
                         than mineral particles that probably originated from biological 
                         production. The HOPE model applied to in situ Rrs performed 
                         satisfactorily for depth in the Abrolhos Bank waters, although 
                         retrievals of aphy(440), CDOM plus NAP (adg(440)) and aT-w(440) 
                         were underestimated with a relative bias of \−27.9%, 
                         \−32.1% and \−45.8%, respectively. The HOPE model 
                         retrievals from the PRISMA image exhibited low aphy(440) values 
                         over the whole scene and the highest adg(440) values in the 
                         Caravelas river plume. Very shallow depths (\≤3 m), bottom 
                         substrate reflectance used as input in the HOPE model, model 
                         parametrization associated with the water complexity in the study 
                         site, and uncertainties associated to Rrs measurements used as 
                         input might be responsible for differences found when comparing 
                         HOPE retrievals with in situ measurements.",
                  doi = "10.3389/frsen.2022.986013",
                  url = "http://dx.doi.org/10.3389/frsen.2022.986013",
                 issn = "2673-6187",
                label = "lattes: 0063119667740811 6 MedeirosZoFrCoCeKa:2022:BiPrBr",
             language = "pt",
           targetfile = "frsen-03-986013.pdf",
        urlaccessdate = "20 maio 2024"
}