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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

A three-step semi analytical algorithm (3SAA) for estimating inherent optical properties over oceanic, coastal, and inland waters from remote sensing reflectance

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Jorge, Daniel S. F. [1] ; Loisel, Hubert [1] ; Jamet, Cedric [1] ; Dessailly, David [2] ; Demaria, Julien [3] ; Bricaud, Annick [4] ; Maritorena, Stephane [5] ; Zhang, Xiaodong [6] ; Antoine, David [4, 7] ; Kutser, Tiit [8] ; Belanger, Simon [9, 10] ; Brando, Vittorio O. [11] ; Werdell, Jeremy [12] ; Kwiatkowska, Ewa [2] ; Mangin, Antoine [3] ; D'Andon, Odile Fanton [3]
Número total de Autores: 16
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[1] Univ Littoral Cote dOpale, CNRS, Univ Lille, UMR 8187, LOG Lab Oceanol & Geosci, F-62930 Wimereux - France
[2] EUMETSAT, Darmstadt - Germany
[3] ACRI ST, F-06904 Sophia Antipolis - France
[4] Sorbonne Univ, CNRS, Lab Oceanog Villefranche, LOV, Villefranche Sur Mer - France
[5] Univ Calif Santa Barbara, Earth Res Inst, Santa Barbara, CA 93106 - USA
[6] Univ Southern Mississippi, Sch Ocean Sci & Engn, Div Marine Sci, Stennis Space Ctr, MS 39529 - USA
[7] Curtin Univ, Sch Earth & Planetary Sci, Remote Sensing & Satellite Res Grp, Perth, WA 6845 - Australia
[8] Univ Tartu, Estonian Marine Inst, Tartu - Estonia
[9] Univ Quebec Rimouski, Dept Biol Chim & Geog, Rimouski, PQ - Canada
[10] Univ Quebec Rimouski, BOREAS, Rimouski, PQ - Canada
[11] Natl Res Council Italy CNR ISMAR, Inst Marine Sci, Rome - Italy
[12] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 - USA
Número total de Afiliações: 12
Tipo de documento: Artigo Científico
Citações Web of Science: 1

We present a three-step inverse model (3SAA) for estimating the inherent optical properties (IOPs) of surface waters from the remote sensing reflectance spectra, Rrs(lambda). The derived IOPs include the total (a(lambda)), phytoplankton (aphy(lambda)), and colored detrital matter (acdm(lambda)), absorption coefficients, and the total (bb(lambda)) and particulate (bbp(lambda)) backscattering coefficients. The first step uses an improved neural network approach to estimate the diffuse attenuation coefficient of downwelling irradiance from Rrs. a(lambda) and bbp(lambda) are then estimated using the LS2 model (Loisel et al., 2018), which does not require spectral assumptions on IOPs and hence can assess a (lambda) and bb(lambda) at any wavelength at which Rrs(lambda) is measured. Then, an inverse optimization algorithm is combined with an optical water class (OWC) approach to assess aphy(lambda) and acdm(lambda) from anw(lambda).The proposed model is evaluated using an in situ dataset collected in open oceanic, coastal, and inland waters. Comparisons with other standard semi-analytical algorithms (QAA and GSM), as well as match-up exercises, have also been performed. The applicability of the algorithm on OLCI observations was assessed through the analysis of global IOPs spatial patterns derived from 3SAA and GSM. The good performance of 3SAA is manifested by median absolute percentage differences (MAPD) of 13%, 23%, 34% and 34% for bbp(443), anw(443), aphy(443) and acdm(443), respectively for oceanic waters. Due to the absence of spectral constraints on IOPs in the inversion of total IOPs, and the adoption of an OWC-based approach, the performance of 3SAA is only slightly degraded in bio-optical complex inland waters. (AU)

Processo FAPESP: 14/23903-9 - Caracterização bio-óptica espaço-temporal e desenvolvimento de algoritmos analíticos para o monitoramento sistemático das massas de água que circulam pela planície de inundação do médio e baixo Amazonas
Beneficiário:Cláudio Clemente Faria Barbosa
Linha de fomento: Auxílio à Pesquisa - Regular