Influence of the Accuracy of Chlorophyll-Retrieval Algorithms on the Estimation of Solar Radiation Absorbed in the Barents Sea

Glukhovets, D. I.; Sheberstov, S. V.; Vazyulya, Svetlana; Yushmanova, A. V.; Salyuk, Pavel A.; Sahling, Inna; Aglova, E. A.

doi:10.3390/rs14194995

Cited by 9 publications

(5 citation statements)

References 48 publications

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“…In the Barents Sea, studies on underwater light field parameters and thermal energy absorption within the visible spectrum of the seawater column reveal that variations in chlorophyll concentration, as estimated by satellite bio-optical algorithms, have a minimal effect (30-50%) on the vertical distribution of light energy absorbed in the water column. This finding underscores the complexity of factors influencing light absorption beyond biological constituents [8]. For five distinct types of core-shell algal particles (double spheroid, quadruple spheroid, filamentous cylindrical, ring-shaped filamentous, and S-shaped filamentous) exposed to a 532 nm blue-green laser wavelength, it was observed that absorption and scattering coefficients increase with particle size.…”

Section: Underwater Environment Influence On Lightmentioning

confidence: 73%

Breakthrough Underwater Physical Environment Limitations on Optical Information Representations: An Overview and Suggestions

Li,

Zhang,

Zhang

et al. 2024

JMSE

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Underwater optics have seen a notable surge of interest in recent years, emerging as a critical medium for conveying information crucial to underwater resource exploration, autonomous underwater vehicle navigation, etc. The intricate dynamics of underwater optical transmission, influenced by factors such as the absorption by the water and scattering by multiple particles, present considerable challenges. One of the most critical issues is that the optical information representation methods fail to take into account the impact of the underwater physical environment. We conducted a comprehensive review and analysis of recent advancements in underwater optical transmission laws and models. We summarized and analyzed relevant research on the effects of underwater particles and turbulence on light and analyzed the polarization effects in various environments. Then, the roles of various types of underwater optical propagation models were analyzed. Although optical models in complex environments are still mostly based on Monte Carlo methods, many underwater optical propagation mechanisms have been revealed and can promote the impacts of optical information expression. We delved into the cutting-edge research findings across three key domains: the enhancement of underwater optical image quality, the 3D reconstruction from monocular images, and the underwater wireless optical communication, examining the pivotal role played by light transmission laws and models in these areas. Drawing upon our extensive experience in underwater optics, including underwater optical sensor development and experiments, we identified and underscored future directions in this field. We advocate for the necessity of further advancements in the comprehension of underwater optical laws and physical models, emphasizing the importance of their expanded application in underwater optical information representations. Deeper exploration into these areas is not only warranted but essential for pushing the boundaries of current underwater optical technologies and unlocking new potential for their application in underwater optical sensor developments, underwater exploration, environmental monitoring, and beyond.

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Section: Underwater Environment Influence On Lightmentioning

confidence: 73%

Breakthrough Underwater Physical Environment Limitations on Optical Information Representations: An Overview and Suggestions

Li,

Zhang,

Zhang

et al. 2024

JMSE

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“…10. A modification of Morel's hydrooptical model for Case 1 waters has been made, which makes it possible to take into account the stratification of inherent optical properties when calculating the parameters of underwater light fields 18 .…”

Section: Results Of Complex Field Studiesmentioning

confidence: 99%

Main directions of hydrooptical research at the Shirshov Institute of Oceanology

Glukhovets

2023

29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics

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The results of the development and improvement of methods of field hydrooptical measurements are presented below, including the development of prototypes of a four-channel flow-through spectral fluorimeter and a deck spectroradiometer, as well as a complex for shipboard measurements of photosynthetically active radiation. The parameterization of the reflectance azimuthal dependence of an optically thick layer of sea ice and the numerical simulation of the formation of the light field structure in the integrating sphere using the Monte Carlo method are performed. The results of complex field studies obtained in Arctic expeditions of the Shirshov Institute of Oceanology, as well as in the northeastern part of the Black Sea, are presented. The results of modification and validation of regional satellite bio-optical algorithms are also shown. Using these algorithms, the data for the Atlas of bio-optical characteristics were updated and supplemented.

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“…For several years, a portable spectrophotometer in the ICAM (Integrated Cavity Absorption Meter) configuration [21] has been used for field measurements of the light absorption spectra of seawater [27][28][29][30][31][32] at the Laboratory of Ocean Optics of the Shirshov Institute of Oceanology of the Russian Academy of Sciences (SIO RAS). The spectrophotometer contains an integrating quartz sphere with a radius R = 43 mm and a quartz wall thickness of 0.75 mm, placed in a sphere made of Fluorilon 99-W™.…”

Section: Integrated Cavity Absorption Metermentioning

confidence: 99%

Numerical Simulation of a Light Field Structure in an Integrating Sphere via the Monte Carlo Method

et al. 2023

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The integrated cavity absorption meter is designed to measure the seawater absorption coefficient spectra which are necessary for studying ocean productivity and heat balance. The performed numerical simulations of a light field structure made it possible to improve the measurement technique. Its results showed that the use of the Lambertian model allows to reduce the calculation time by two orders of magnitude with an acceptable loss of accuracy for these calculations. It is shown that in the case of an integrating sphere made of fluorilon, the use of different volume scattering functions does not affect the calculation result, which is not true in the case of using a sphere with a mirror coating. The effect of an air layer between quartz and fluorilon is considered, and the applicability of the diffusion approximation is verified. Examples of field measurements of the seawater absorption coefficient and its components performed in different water areas of the World Ocean in 2020–2022 are presented.

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Influence of the Accuracy of Chlorophyll-Retrieval Algorithms on the Estimation of Solar Radiation Absorbed in the Barents Sea

Cited by 9 publications

References 48 publications

Breakthrough Underwater Physical Environment Limitations on Optical Information Representations: An Overview and Suggestions

Breakthrough Underwater Physical Environment Limitations on Optical Information Representations: An Overview and Suggestions

Main directions of hydrooptical research at the Shirshov Institute of Oceanology

Numerical Simulation of a Light Field Structure in an Integrating Sphere via the Monte Carlo Method

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