Re-parameterization of a quasi-analytical algorithm for colored dissolved organic matter dominant inland waters

dc.contributor.authorOgashawara, Igor
dc.contributor.authorMishra, Deepak R.
dc.contributor.authorNascimento, Renata F. F.
dc.contributor.authorAlcantara, Enner H. [UNESP]
dc.contributor.authorKampel, Milton
dc.contributor.authorStech, Jose L.
dc.contributor.institutionIndiana Univ Purdue Univ
dc.contributor.institutionUniv Georgia
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionNatl Inst Space Res
dc.description.abstractQuasi-Analytical Algorithms (QAAs) are based on radiative transfer equations and have been used to derive inherent optical properties (IOPs) from the above surface remote sensing reflectance (R-rs) in aquatic systems in which phytoplankton is the dominant optically active constituents (OACs). However, Colored Dissolved Organic Matter (CDOM) and Non Algal Particles (NAP) can also be dominant OACs in water bodies and till now a QAA has not been parametrized for these aquatic systems. In this study, we compared the performance of three widely used QAAs in two CDOM dominated aquatic systems which were unsuccessful in retrieving the spectral shape of IOPS and produced minimum errors of 350% for the total absorption coefficient (a), 39% for colored dissolved matter absorption coefficient (a(CDM)) and 7566.33% for phytoplankton absorption coefficient (a(phy)). We re-parameterized a QAA for CDOM dominated (hereafter QAA(CDOM)) waters which was able to not only achieve the spectral shape of the OACs absorption coefficients but also brought the error magnitude to a reasonable level. The average errors found for the 400-750nm range were 30.71 and 14.51 for a, 14.89 and 8.95 for a(CDM) and 25.90 and 29.76 for a(phy) in Funil and Itumbiara Reservoirs, Brazil respectively. Although QAA(CDOM) showed significant promise for retrieving IOPs in CDOM dominated waters, results indicated further tuning is needed in the estimation of a(lambda) and a(phy)(lambda). Successful retrieval of the absorption coefficients by QAA(CDOM) would be very useful in monitoring the spatio-temporal variability of IOPS in CDOM dominated waters. (C) 2016 Elsevier B.V. All rights reserved.en
dc.description.affiliationIndiana Univ Purdue Univ, Dept Earth Sci, 723 West Michigan St,SL118, Indianapolis, IN 46202 USA
dc.description.affiliationUniv Georgia, Dept Geog, Ctr Geospatial Res, Athens, GA 30602 USA
dc.description.affiliationGeopixel, Sao Jose Dos Campos, SP, Brazil
dc.description.affiliationSao Paulo State Univ, Dept Cartog, Presidente Prudente, SP, Brazil
dc.description.affiliationNatl Inst Space Res, Remote Sensing Div, Sao Jose Dos Campos, SP, Brazil
dc.description.affiliationUnespSao Paulo State Univ, Dept Cartog, Presidente Prudente, SP, Brazil
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipIdFAPESP: 2007/08103-2
dc.description.sponsorshipIdFAPESP: 2011/19523-8
dc.identifier.citationInternational Journal Of Applied Earth Observation And Geoinformation. Amsterdam: Elsevier Science Bv, v. 53, p. 128-145, 2016.
dc.publisherElsevier B.V.
dc.relation.ispartofInternational Journal Of Applied Earth Observation And Geoinformation
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectBio-optical model
dc.subjectColored dissolved organic matter
dc.subjectInland waters
dc.subjectQuasi-analytical algorithm
dc.subjectInherent optical properties
dc.subjectAbsorption coefficient of phytoplankton
dc.subjectRemote sensing reflectance
dc.titleRe-parameterization of a quasi-analytical algorithm for colored dissolved organic matter dominant inland watersen
dcterms.rightsHolderElsevier B.V.
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