Results 11 to 20 of about 12,923 (262)

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

Ocean 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

Review of Optical Fiber Sensors for Temperature, Salinity, and Pressure Sensing and Measurement in Seawater

Sensors, 2022
Temperature, salinity, and pressure (TSP) are essential parameters for the ocean. Optical fiber sensors (OFSs) have rapidly come into focus as an ocean detection technology in recent years due to their advantages of electromagnetic interference, light ...
Honglin Liang, Jing Wang, Lihui Zhang, Jichao Liu, Shanshan Wang   +4 more
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Diurnal Variability in Chlorophyll-a, Carotenoids, CDOM and SO42− Intensity of Offshore Seawater Detected by an Underwater Fluorescence-Raman Spectral System

Sensors, 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, Wangquan Ye, Jinjia Guo, Zhao Luo, Ying Li   +4 more
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A Multiparametric Nonlinear Regression Approach for the Estimation of Global Surface Ocean pCO₂ Using Satellite Oceanographic Data

IEEE 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, Palanisamy Shanmugam, Pullaiahgari Venkata Nagamani   +2 more
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High-Sensitivity Salinity and Temperature Sensing in Seawater Based on a Microfiber Directional Coupler

IEEE 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, Hongjuan Yang, Yipeng Liao, Xin Wang, Jing Wang   +4 more
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Investigation of Two Novel Approaches for Detection of Sulfate Ion and Methane Dissolved in Sediment Pore Water Using Raman Spectroscopy

Sensors, 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, Jing Chen, Wangquan Ye, Jinjia Guo, Xin Zhang, Ronger Zheng   +5 more
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Experimental Research on Temperature Sensing of Seawater Based on Three Interferometers Incorporated With Bow Tie Fiber

Photonic 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, Yu Li, Shanshan Wang, Jibo Xu, Zheng Wen, Jing Wang   +5 more
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Analysis and Modeling Methodologies for Heat Exchanges of Deep-Sea In Situ Spectroscopy Detection System Based on ROV

Sensors, 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, Fujun Qi, Wangquan Ye, Kai Cheng, Jinjia Guo, Ronger Zheng   +5 more
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DeepSurveyCam—A Deep Ocean Optical Mapping System [PDF]

Sensors, 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, Kevin Köser, Jan Sticklus, Marcel Rothenbeck, Tim Weiß, Emanuel Wenzlaff, Timm Schoening, Lars Triebe, Anja Steinführer, Colin W. Devey, Jens Greinert   +10 more
openaire   +3 more sources

Comparison of an In Situ Imaging Device and Net-Based Method to Study Mesozooplankton Communities in an Oligotrophic System

Frontiers in Marine Science, 2022
In the past several years, the capabilities of optical tools and in situ imaging devices have greatly expanded and are now revolutionizing the field of plankton research.
Alexander Barth, Joshua Stone
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