Results 251 to 260 of about 26,343 (300)

Optical discrimination of emulsified oil in optically complex estuarine waters

Marine Pollution Bulletin, 2022
Coastal estuaries, characterized by highly varying waters with complex optical properties, pose challenges for effective oil discrimination via optical remote sensing. In this study, an object-based spectra comparison (OBSC) approach was proposed to extract emulsified oil slicks from Balikpapan Bay, Indonesia, using optical imagery from Sentinel-2 ...
Shaojie, Sun, Ying, Chen, Xi, Chen, Bin, Ai, Jun, Zhao   +4 more
openaire   +2 more sources

Retrieving Phytoplankton Functional Groups from Water Reflectance in Optically Complex Waters

Optica Sensing Congress 2023 (AIS, FTS, HISE, Sensors, ES), 2023
It is very hard to discriminate PFGs in optically complex waters even if hyperspectral data is available. Features characteristic to one group may be sometimes observed in reflectance of other phytoplankton groups. Reflectance depends on phytoplankton phenology, biomass and vertical distribution making reflectance spectra of a single group very ...
Tiit Kutser, Birgot Paavel, Karolin Teeveer, Martin Ligi, Mirjam Uusõue, Külli Kutser, Ele Vahtmäe   +6 more
openaire   +1 more source

Spectral modes of radiometric measurements in optically complex waters

Continental Shelf Research, 2021
Abstract The case-1 (optically simple) oceanic environment is described by a smoothly transitioning gradient in optical properties arising from the concentration of the primary algal photopigment, chlorophyll a, plus its covarying and optically relevant constituents.
Stanford B. Hooker, Henry F. Houskeeper, Raphael M. Kudela, Atsushi Matsuoka, Koji Suzuki, Tomonori Isada   +5 more
openaire   +1 more source

Optical classification of optically complex waters around china

2014 6th Workshop on Hyperspectral Image and Signal Processing: Evolution in Remote Sensing (WHISPERS), 2014
For optically complex waters, the optical classification was suggested to be a good solution to improve the retrieval of biogeochemical products, and more appropriate for large-scale complex waters than classical regional waters. Around China there are turbid lakes, complex rivers and highly contrasted coastal regions, so the study provided an ...
Shen Qian, Ni Li, Sun Xu, Gao Lianru, Zhang Bing   +4 more
openaire   +1 more source

Absorption characteristics of optically complex inland waters: Implications for water optical classification

Journal of Geophysical Research: Biogeosciences, 2013
Multiple bio‐optical measurements were conducted in inland waters of China, including Lake Taihu [spring and autumn], Lake Chaohu, Lake Dianchi, and Three Gorges Reservoirs. The variations in the absorption characteristics of chromophoric dissolved organic matter (CDOM), phytoplankton, and non‐algal particles (NAP) and their relative contributions to ...
Kun Shi, Yunmei Li, Lin Li, Heng Lu
openaire   +1 more source

Remote Estimation of Water Clarity in Optically Complex Estuarine Waters

Remote Sensing of Environment, 1999
Abstract AVHRR satellite imagery was evaluated as a potential data source for monitoring light attenuation (KPAR), as a measure of turbidity, in Pamlico Sound estuary, North Carolina. In situ water quality data and reflectance imagery collected on 10 different dates were used to calibrate a general optical equation relating satellite-derived ...
Dana L. Woodruff, Richard P. Stumpf, Julie A. Scope, Hans W. Paerl   +3 more
openaire   +1 more source

Improved estimates of bio-optical parameters in optically complex water using hyperspectral remote sensing data

International Journal of Remote Sensing, 2021
In this study, bio-optical parameters were derived from hyperspectral data of optically complex waters using spectrum matching technique (SMT).
Syed Moosa Ali, Anurag Gupta, Mini Raman, Arvind Sahay, Gunjan Motwani, Pradipta R. Muduli, Aswathy Vijaya Krishna, Anima Tirkey   +7 more
openaire   +1 more source

PEGylated meso-arylporpholactone metal complexes as optical cyanide sensors in water

Org. Biomol. Chem., 2014
A number of water-soluble metal complexes of PEGylatedmeso-fluorophenylporpholactones display a specific optical response upon addition of cyanide.
Jill L, Worlinsky, Steven, Halepas, Christian, Brückner   +2 more
openaire   +2 more sources

Temporal unmixing-based cloud removal algorithm for optically complex water images

International Journal of Remote Sensing, 2021
Remote sensing has become an essential technique in water environment monitoring. However, the cloud contamination of remote sensing images breaks its spatial and temporal continuity in practical a...
Yulong Guo, Weiqiang Chen, Xinwei Feng, Yali Zhang, Yingchao Li, Changchun Huang, Yuan Li   +6 more
openaire   +1 more source

Adaptive semianalytical inversion of ocean color radiometry in optically complex waters

Applied Optics, 2012
To address the challenges of the parameterization of ocean color inversion algorithms in optically complex waters, we present an adaptive implementation of the linear matrix inversion method (LMI) [J. Geophys. Res.101, 16631 (1996)], which iterates over a limited number of model parameter sets to account for naturally occurring spatial or temporal ...
Vittorio E, Brando, Arnold G, Dekker, Young Je, Park, Thomas, Schroeder   +3 more
openaire   +2 more sources