Results 41 to 50 of about 866,470 (189)

Promoting Instrument Development for New Research Avenues in Ocean Science: Opening the Black Box of Grazing

Frontiers in Marine Science, 2021
While recent research has provided increasing insight into ocean ecosystem functions and rapidly improving predictive ability, it has become clear that for some key processes, including grazing by zooplankton, there simply is no currently available ...
Susanne Menden-Deuer, Wayne Homer Slade, Heidi Dierssen   +2 more
doaj   +1 more source

Bayesian approach to a generalized inherent optical property model

Optics Express, 2023
Relationships between the absorption and backscattering coefficients of marine optical constituents and ocean color, or remote sensing reflectances R rs (λ), can be used to predict the concentrations of these constituents in the upper water column. Standard inverse modeling techniques that minimize error between the modeled and observed R
Zachary K. Erickson, Lachlan McKinna, P. Jeremy Werdell, Ivona Cetinić   +3 more
openaire   +2 more sources

Seven-channel nanoprinting and meta-holography based on metasurface-space and angular multiplexing

Results in Physics, 2023
Metasurfaces have emerged as crucial materials for optical information encryption and storage, lauded for their ease of operation and high programmability.
Fan Gao, Xin Zhou, Lu Tao Lu, Juan Deng, Bo Yan   +4 more
doaj   +1 more source

Inherent optical properties of the coccolithophore: Emiliania huxleyi

Optics Express, 2013
A realistic nonspherical model for Emiliania huxleyi (EHUX) is built, based on electron micrographs of coccolithophore cells. The Inherent Optical Properties (IOP) of the EHUX are then calculated numerically by using the discrete dipole approximation.
Peng-Wang, Zhai, Yongxiang, Hu, Charles R, Trepte, David M, Winker, Damien B, Josset, Patricia L, Lucker, George W, Kattawar   +6 more
openaire   +2 more sources

Inherent optical property estimation in deep waters

Optics Express, 2011
We develop two algorithms for determining two inherent optical properties (IOPs) from radiometric measurements in vertically homogeneous waters. The first algorithm is for estimation of the ratio of the backscattering to absorption coefficients from measurements of only the vertically upward radiance and the downward planar irradiance at depths where ...
Eric, Rehm, Norman J, McCormick
openaire   +2 more sources

Dependence of the Bidirectional Reflectance Distribution Function Factor ƒ′ on the Particulate Backscattering Ratio in an Inland Lake

Remote Sensing, 2023
The bidirectional reflectance distribution function (BRDF) factor ƒ′ provides a bridge between the inherent and apparent optical properties (IOPs and AOPs) of inland waters.
Yu Zhang, Lifu Zhang, Changping Huang, Yi Cen, Qingxi Tong   +4 more
doaj   +1 more source

Deriving inherent optical properties from classical water color measurements: Forel-Ule index and Secchi disk depth.

Optics Express, 2019
Secchi disk depth (ZSD) and Forel-Ule index (FUI) are the two oldest and easiest measurements of water optical properties based on visual determination.
Shenglei Wang, Z. Lee, S. Shang, Junsheng Li, Bing Zhang, G. Lin   +5 more
semanticscholar   +1 more source

Retrieval of Particle Scattering Coefficients and Concentrations by Genetic Algorithms in Stratified Lake Water

Remote Sensing, 2014
We retrieved the mass-specific scattering coefficient b*sm(λ) = 0.60·(λ/650)−1.82 of the inhomogeneous and optically complex water column of eastern Lake Constance in May 2012.
Jaime Pitarch, Daniel Odermatt, Marcin Kawka, Alfred Wüest   +3 more
doaj   +1 more source

Phytoplankton community dynamic detection from the chlorophyll-specific absorption coefficient in productive inland waters

Acta Limnologica Brasiliensia, 2017
Aim: In this research, we investigated the spectral variability of the specific phytoplankton absorption coefficient, a*φ, measured in a tropical meso-to-hypertrophic reservoir, aiming to find spectral features associated with the chlorophyll-a (chla ...
Fernanda Sayuri Yoshino Watanabe, Enner Herenio de Alcântara, Thanan Walesza Pequeno Rodrigues, Nariane Marselhe Ribeiro Bernardo, Luiz Henrique da Silva Rotta, Nilton Nobuhiro Imai   +5 more
doaj   +1 more source

Geometric effects of an inhomogeneous sea ice cover on the under ice light field

Frontiers in Earth Science, 2016
Light measurements in the ocean provide crucial information about the energy fluxes in the climate and ecosystem. Currently radiative transfer problems are usually considered in horizontally homogeneous layers although it is known to be a crude ...
Christian eKatlein, Donald K Perovich, Marcel eNicolaus   +2 more
doaj   +1 more source