Journal ArticleDOI
Uncertainties of optical parameters and their propagations in an analytical ocean color inversion algorithm.
TLDR
This study evaluated the effects of uncertainties of these optical parameters on the inverted IOPs: the absorption coefficient at the reference wavelength, the extrapolation of particle backscattering coefficient, and the spectral ratios of absorption coefficients of phytoplankton and detritus/gelbstoff, respectively.Abstract:
Following the theory of error propagation, we developed analytical functions to illustrate and evaluate the uncertainties of inherent optical properties (IOPs) derived by the quasi-analytical algorithm (QAA). In particular, we evaluated the effects of uncertainties of these optical parameters on the inverted IOPs: the absorption coefficient at the reference wavelength, the extrapolation of particle backscattering coefficient, and the spectral ratios of absorption coefficients of phytoplankton and detritus/gelbstoff, respectively. With a systematically simulated data set (46,200 points), we found that the relative uncertainty of QAA-derived total absorption coefficients in the blue-green wavelengths is generally within ±10% for oceanic waters. The results of this study not only establish theoretical bases to evaluate and understand the effects of the various variables on IOPs derived from remote-sensing reflectance, but also lay the groundwork to analytically estimate uncertainties of these IOPs for each pixel. These are required and important steps for the generation of quality maps of IOP products derived from satellite ocean color remote sensing.read more
Citations
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Journal ArticleDOI
Chlorophyll aalgorithms for oligotrophic oceans: A novel approach based on three‐band reflectance difference
TL;DR: In this paper, a color index (CI) was proposed to estimate surface chlorophyll-a concentrations (Chl) in the global ocean for Chl less than or equal to 0.25 milligrams per cubic meters.
Journal ArticleDOI
Estimation of near-infrared water-leaving reflectance for satellite ocean color data processing.
TL;DR: Application of an optical model for the sixth reprocessing of the SeaWiFS mission-long time-series resulted in significant reductions in the number of negative water-leaving reflectance retrievals in turbid and optically complex waters, and improved agreement with in situ chlorophyll-a observations.
Journal ArticleDOI
Generalized ocean color inversion model for retrieving marine inherent optical properties
P. Jeremy Werdell,Bryan A. Franz,Sean W. Bailey,Gene C. Feldman,Emmanuel Boss,Vittorio E. Brando,Mark Dowell,Takafumi Hirata,Samantha Lavender,Zhongping Lee,Hubert Loisel,Stéphane Maritorena,Frédéric Mélin,Timothy S. Moore,Timothy J Smyth,David Antoine,Emmanuel Devred,Odile Fanton d'Andon,Antoine Mangin +18 more
TL;DR: The theoretical basis of GIOP is described, a preliminary default configuration for GIOP (GIOP-DC) is proposed, and its comparable performance to other popular SAAs is presented and the sensitivities of their output to their parameterization are quantified.
Journal ArticleDOI
Aquatic color radiometry remote sensing of coastal and inland waters: Challenges and recommendations for future satellite missions
Colleen B. Mouw,Steven Greb,Dirk Aurin,Paul M. DiGiacomo,Zhongping Lee,Michael S. Twardowski,Caren Binding,Chuanmin Hu,Ronghua Ma,Timothy S. Moore,Wesley J. Moses,Susanne E. Craig +11 more
TL;DR: Aquatic color radiometry remote sensing of coastal and inland water bodies is of great interest to a wide variety of research, management, and commercial entities as well as the general public as mentioned in this paper.
Journal ArticleDOI
An overview of approaches and challenges for retrieving marine inherent optical properties from ocean color remote sensing.
P. Jeremy Werdell,Lachlan I. W. McKinna,Emmanuel Boss,Steven G. Ackleson,Susanne E. Craig,Susanne E. Craig,Watson W. Gregg,Zhongping Lee,Stéphane Maritorena,Collin S. Roesler,Cecile S. Rousseaux,Cecile S. Rousseaux,Dariusz Stramski,James M. Sullivan,Michael S. Twardowski,Maria Tzortziou,Maria Tzortziou,Xiaodong Zhang +17 more
TL;DR: A synopsis of the current state of the art in the retrieval of core optical properties from satellite ocean color is presented and recommendations for future investment for upcoming missions whose instrument characteristics diverge sufficiently from heritage and existing sensors to warrant reassessing current approaches are made.
References
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Journal ArticleDOI
Ocean Color Chlorophyll Algorithms for SEAWIFS
John E. O'Reilly,Stéphane Maritorena,B. Greg Mitchell,David A. Siegel,Kendall L. Carder,Sara A. Garver,Mati Kahru,Charles R. McClain +7 more
TL;DR: In this article, a large data set containing coincident in situ chlorophyll and remote sensing reflectance measurements was used to evaluate the accuracy, precision, and suitability of a wide variety of ocean color algorithms for use by SeaWiFS (Sea-viewing Wide Field-of-view Sensor).
Journal ArticleDOI
Absorption spectrum (380–700 nm) of pure water. II. Integrating cavity measurements
Robin M. Pope,Edward S. Fry +1 more
TL;DR: Definitive data on the absorption spectrum of pure water from 380 to 700 nm have been obtained with an integrating cavity technique and several spectroscopic features have been identified in the visible spectrum to the knowledge for the first time.
Journal ArticleDOI
Optical properties of the clearest natural waters (200–800 nm)
Raymond C. Smith,Karen S. Baker +1 more
TL;DR: A comparative analysis and new data allow a consistent and accurate set of optical properties for the clearest natural waters and for pure fresh water and saltwater to be estimated from 300 to 800 nm.
Journal ArticleDOI
Retrieval of water-leaving radiance and aerosol optical thickness over the oceans with SeaWiFS: a preliminary algorithm
Howard R. Gordon,Menghua Wang +1 more
TL;DR: It is shown, using aerosol models, that certain assumptions regarding the spectral behavior of the aerosol reflectance employed in the standard CZCS correction algorithm are not valid over the spectral range encompassing both the visible and the NIR.
Journal ArticleDOI
Absorption by dissolved organic matter of the sea (yellow substance) in the UV and visible domains1
TL;DR: In this paper, the spectral dependence law of absorption appears to vary within a restricted range, and an average law can be considered representative of rapid measurements at one selected wavelength, and the concentration appears influenced predominantly by natural and industrial land discharges.