Results 11 to 20 of about 1,141,579 (307)

Outstanding Topics in Ocean Optics [PDF]

open access: yes, 2019
Ocean optics is a branch of oceanography which is firmly embedded in studies of a great variety of ocean science and engineering questions. The interactive nature between radiative transfer of light and various dissolved and particulate constituents of seawater is at the core of ocean optics science and applications.
Stramski, Dariusz, Loisel, Hubert
openaire   +5 more sources

Modelling of underwater light fields in turbid and eutrophic waters: application and validation with experimental data [PDF]

open access: yesOcean Science, 2015
A reliable radiative transfer (RT) model is an essential and indispensable tool for understanding the radiative transfer processes in homogenous and layered waters, analyzing measurements made by radiance sensors and developing remote-sensing algorithms ...
B. Sundarabalan, P. Shanmugam
doaj   +1 more source

A Multiparametric Nonlinear Regression Approach for the Estimation of Global Surface Ocean pCO2 Using Satellite Oceanographic Data

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
Estimation of the partial pressure of carbon dioxide (pCO2) and its space-time variability in global surface ocean waters is essential for understanding the carbon cycle and predicting the future atmospheric CO2 concentration.
Kande Vamsi Krishna   +2 more
doaj   +1 more source

Diurnal Variability in Chlorophyll-a, Carotenoids, CDOM and SO42− Intensity of Offshore Seawater Detected by an Underwater Fluorescence-Raman Spectral System

open access: yesSensors, 2016
A newly developed integrated fluorescence-Raman spectral system (λex = 532 nm) for detecting Chlorophyll-a (chl-a), Chromophoric Dissolved Organic Matter (CDOM), carotenoids and SO42− in situ was used to successfully investigate the diurnal variability ...
Jing Chen   +4 more
doaj   +1 more source

High-Sensitivity Salinity and Temperature Sensing in Seawater Based on a Microfiber Directional Coupler

open access: yesIEEE Photonics Journal, 2016
A simple, high-sensitivity, and low-cost optical sensor for the measurement of temperature and salinity in seawater is demonstrated based on a microfiber directional coupler.
Shanshan Wang   +4 more
doaj   +1 more source

Experimental Research on Temperature Sensing of Seawater Based on Three Interferometers Incorporated With Bow Tie Fiber

open access: yesPhotonic Sensors, 2023
Three interferometers (the Sagnac sensor, the linear polarization interferometer, and the reflecting polarization interferometer) incorporated with the bow tie fiber are proposed to detect the seawater temperature.
Changxin Zhai   +5 more
doaj   +1 more source

Life beneath the ice: jellyfish and ctenophores from the Ross Sea, Antarctica, with an image-based training set for machine learning [PDF]

open access: yesBiodiversity Data Journal, 2021
Southern Ocean ecosystems are currently experiencing increased environmental changes and anthropogenic pressures, urging scientists to report on their biodiversity and biogeography.
Gerlien Verhaegen   +2 more
doaj   +3 more sources

Investigation of Two Novel Approaches for Detection of Sulfate Ion and Methane Dissolved in Sediment Pore Water Using Raman Spectroscopy

open access: yesSensors, 2015
The levels of dissolved sulfate and methane are crucial indicators in the geochemical analysis of pore water. Compositional analysis of pore water samples obtained from sea trials was conducted using Raman spectroscopy.
Zengfeng Du   +5 more
doaj   +1 more source

DeepSurveyCam—A Deep Ocean Optical Mapping System [PDF]

open access: yesSensors, 2016
Underwater photogrammetry and in particular systematic visual surveys of the deep sea are by far less developed than similar techniques on land or in space. The main challenges are the rough conditions with extremely high pressure, the accessibility of target areas (container and ship deployment of robust sensors, then diving for hours to the ocean ...
Tom Kwasnitschka   +10 more
openaire   +4 more sources

Analysis and Modeling Methodologies for Heat Exchanges of Deep-Sea In Situ Spectroscopy Detection System Based on ROV

open access: yesSensors, 2018
In recent years, cabled ocean observation technology has been increasingly used for deep sea in situ research. As sophisticated sensor or measurement system starts to be applied on a remotely operated vehicle (ROV), it presents the requirement to ...
Xiaorui Liu   +5 more
doaj   +1 more source

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