Results 71 to 80 of about 1,679 (195)

Using Machine Learning to Uncover Ecological Mechanisms Controlling Abundance of Phytoplankton Size Classes From Large‐Scale Observations

Global Biogeochemical Cycles, Volume 40, Issue 4, April 2026.
Abstract Phytoplankton size classes (PSCs) and Phytoplankton functional types (PFTs) determine many fundamental biogeochemical processes including nutrient uptake, energy transfer through marine food webs, ocean carbon export, and gas exchange with the atmosphere. Discerning the causes of spatio‐temporal variability of PSCs is a scientific priority for
Sandupal Dutta, Anand Gnanadesikan
wiley   +1 more source

A Phenoregion Approach to Understanding Chlorophyll‐a Seasonal Cycles and Interannual Variability in the South‐West Indian Ocean

Journal of Geophysical Research: Oceans, Volume 131, Issue 4, April 2026.
Abstract The South‐West Indian Ocean (SWIO) displays marked spatial variations in physical forcings, driving in turn distinct seasonal biogeochemical regimes. Mesoscale eddies in the Mozambique Channel drive large‐scale redistribution of nutrients and plankton, while eastern Madagascar waters are highly oligotrophic.
Aline Arens, Pierrick Penven, Fanny Chenillat, Stéphane Pous, Fialho Nehama, Bernardino S. Malauene   +5 more
wiley   +1 more source

Advancing Earth System Science With the NASA Plankton, Aerosol, Cloud, Ocean Ecosystem (PACE) Satellite Mission

Global Change Biology, Volume 32, Issue 4, April 2026.
The Plankton, Aerosol, Cloud, ocean Ecosystem (PACE) mission extends and improves upon NASA's 30+ years of satellite observations of Earth's living ocean, atmosphere, and land. Its unprecedented, high‐resolution data support critical research in climate forcing, ecosystem health, and biogeochemical cycling, while aiding socioeconomic applications such ...
P. Jeremy Werdell, Brian Cairns, Skyelar A. Caplan, Ivona Cetinić, Sean R. Foley, Bryan A. Franz, Meng Gao, Zachary T. Fasnacht, K. Fred Huemmrich, Amir Ibrahim, Kirk D. Knobelspiesse, Antonio Mannino, Lachlan I. W. McKinna, Carina Poulin, Chamara Rajapakshe, Andrew M. Sayer   +15 more
wiley   +1 more source

Applicazioni Copernicus a scala locale per il monitoraggio delle acque di balneazione

GEOmedia, 2019
TEMAR is a collaborative research project, aimed at the research, development and testing of an innovative service for monitoring and mitigating the risk of pollution of bathing water, of potential interest for a vast use.
Giacomo Martirano, Vittorio Gagliardi
doaj  

Machine-learning-estimation of high-spatiotemporal-resolution chlorophyll-a concentration using multi-satellite imagery

Sustainable Environment Research, 2023
Chlorophyll-a concentration for quantifying phytoplankton biomass is commonly used as an indicator for evaluating the trophic level of lakes and water quality.
Wachidatin Nisaul Chusnah, Hone-Jay Chu, Tatas, Lalu Muhamad Jaelani   +3 more
doaj   +1 more source

Suitability of different in-water algorithms for eutrophic and absorbing waters applied to Sentinel-2 MSI and Sentinel-3 OLCI data

Frontiers in Remote Sensing
Optically complex waters present significant challenges for remote sensing due to high concentrations of optically active substances (OASs) and their inherent optical properties (IOPs), as well as the adjacency effect.
Ave Ansper-Toomsalu, Mirjam Uusõue, Mirjam Uusõue, Kersti Kangro, Kersti Kangro, Martin Hieronymi, Krista Alikas   +6 more
doaj   +1 more source

Quantifying methane emissions from Laurentian Great Lakes estuaries using in situ measurements, remote sensing, and machine learning

Limnology and Oceanography Letters, Volume 11, Issue 2, March 2026.
Abstract Freshwater estuaries are natural contributors to the carbon cycle, including production and emission of methane (CH4), a potent greenhouse gas (GHG); however, estimates of their contribution to global GHG emissions is uncertain. Recent research has identified the potential for quantifying limnetic methane using optical remote sensing coupled ...
Jillian Greene, Ashtyn Gluck, Bopaiah Biddanda, Michael Philben, Sean Woznicki   +4 more
wiley   +1 more source

Validation of photosynthetically active radiation by OLCI on Sentinel-3 against ground-based measurements in the central Mediterranean and possible aerosol effects

European Journal of Remote Sensing
Instantaneous determinations of photosynthetically active radiation (PAR) over the sea from the Ocean and Land Color Instrument (OLCI) on Sentinel-3 are compared with in-situ measurements at the island of Lampedusa in the central Mediterranean Sea ...
Mattia Pecci, Simone Colella, Tatiana Di Iorio, Daniela Meloni, Francesco Monteleone, Giandomenico Pace, Damiano Massimiliano Sferlazzo, Alcide Giorgio di Sarra   +7 more
doaj   +1 more source

Short‐Term Estuarine Phytoplankton Dynamics in Response to Hurricanes Along the Gulf Coast of America: A Variational Autoencoder (VAE) Approach With Satellite and Bio‐Optical Observations

Journal of Geophysical Research: Oceans, Volume 131, Issue 3, March 2026.
Abstract Hurricanes drive diverse estuarine phytoplankton responses and can trigger cascading ecological and physicochemical impacts. Capturing these short‐term dynamics requires high spatiotemporal resolution. Here, we applied a globally‐applicable coastal ocean color algorithm, Variational Autoencoder (VAE), to Sentinel‐2 MSI imagery for chlorophyll ...
J. Li, B. Liu, J. Lou, X. Yuan, E. J. D’Sa, M. M. Baustian, M. La Peyre, A. Freeman, V. S. Martins, E. Habib   +9 more
wiley   +1 more source

Double‐Peaked Hyperspectral Features at 710 and 800 nm for Monitoring Coastal Chlorophyll‐α Concentrations From Space

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 3, March 2026.
Abstract The concentration of chlorophyll‐α $\alpha $ has been estimated from sea color, primarily based on the reflectance ratio between the blue and green spectral bands in multiband images obtained by satellite optical sensors. However, this method is only effective in open, clear water and cannot be reliably applied to shallow coastal waters.
Satoru Yamamoto, Masaru Mizuyama, Moe Matsuoka, Ayame Ikeda, Hiroki Mizuochi, Akira Iguchi   +5 more
wiley   +1 more source