Results 61 to 70 of about 1,955 (188)

Optical remote sensing (Sentinel-3 OLCI) used to monitor dissolved organic carbon in the Lena River, Russia

Frontiers in Marine Science, 2023
In the past decades the Arctic has experienced stronger temperature increases than any other region globally. Shifts in hydrological regimes and accelerated permafrost thawing have been observed and are likely to increase mobilization of organic carbon ...
Jan El Kassar, Bennet Juhls, Martin Hieronymi, Rene Preusker, Anne Morgenstern, Jürgen Fischer, Pier Paul Overduin   +6 more
doaj   +1 more source

Shifting ice phenology and ice extent linked to harmful algal bloom severity

Limnology and Oceanography, Volume 71, Issue 7, July 2026.
Abstract Ice cover on lakes can have far‐reaching and profound effects on ecosystem structure and function. However, the duration and spatial extent of ice cover is changing rapidly with warming aquatic ecosystems. This loss of ice creates an urgent need to understand how lakes will function without ice cover, both during the ice‐on and ice‐free season,
Claire M. Stevens, Marguerite A. Xenopoulos   +1 more
wiley   +1 more source

Quantifying Shifts in the Absorption Budget of the Labrador Sea as the Dominant Phytoplankton Group Changes Between Diatoms and Phaeocystis

Journal of Geophysical Research: Oceans, Volume 131, Issue 7, July 2026.
Abstract Phytoplankton spring blooms in the Labrador Sea are dominated by diatoms, with Phaeocystis spp. (hereafter Phaeocystis) contributing more than 25% to total phytoplankton biomass. However, in 2015 and 2022, large blooms of Phaeocystis were observed, contributing up to 90% of the surface phytoplankton biomass. In this study, we quantified shifts
K. L. Wilson, E. Devred, T. Perry, S. Clay   +3 more
wiley   +1 more source

On the Variability of the Agulhas Bank Circulation

Journal of Geophysical Research: Oceans, Volume 131, Issue 7, July 2026.
Abstract This modeling study investigates the variability of the Agulhas Bank (AB) circulation, focusing on its connections to the local wind forcing and the Agulhas Current (AC) as well as to teleconnections to the tropical South Atlantic. The mean AB circulation is dominated by a westward flow composed of a coastal jet, an outer‐shelf flow influenced
V. Combes, R. P. Matano
wiley   +1 more source

Strategic Roadmap for Addressing Microplastic Pollution in the Global South: Bridging Monitoring Gaps, Harmonizing Methods, and Building Analytical Capacity

Environmental Quality Management, Volume 35, Issue 4, Summer 2026.
ABSTRACT Microplastic (MP) pollution represents a growing environmental challenge, especially in tropical and subtropical coastal regions of the Global South, where methodological fragmentation, funding discontinuity, and dependence on external analytical infrastructure limit the production of comparable data and the formulation of evidence‐based ...
Guilherme Malafaia, Thiarlen Marinho da Luz   +1 more
wiley   +1 more source

Global Drivers of Phytoplankton Phenology Trends

Global Change Biology, Volume 32, Issue 6, June 2026.
Observations and a global biogeochemical model were used to examine recent shifts in phytoplankton phenology at the global scale. Sea surface temperature trends emerge as the strongest predictor of these changes, relative to the other drivers considered, and are associated with earlier initiation, later termination, and longer growing periods ...
Joe K. Guest, Marie‐Fanny Racault, Corinne Le Quéré   +2 more
wiley   +1 more source

Snow Depth on Arctic Sea Ice Retrieval Using a Synergy of Sentinel‐3's Active and Passive Microwave Instruments

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract Snow depth remains one of the largest sources of uncertainty in satellite‐derived sea ice thickness (SIT). Here, we introduce the novel Nadir Radiometer and Radar Synergy (NaRRS) method that combines data from Sentinel‐3's Microwave Radiometer (MWR) and Synthetic Aperture Radar Altimeter (SRAL) to retrieve Arctic snow depth on sea ice.
Connor Nelson, Julienne Stroeve, Thomas Lavergne, Jack Landy, Rosemary Willatt, Thomas Johnson, Fabrizio Baordo, Robbie Mallett, Michel Tsamados   +8 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  

Copernicus Sentinel-3 OLCI Level-1B Radiometry Product Validation Status After Six Years in Constellation by Three Independent Expert Groups

Remote Sensing
As part of the Copernicus program of the European Union (EU), the European Space Agency (ESA) and the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT) are currently operating the Sentinel-3 mission that consists of a ...
Bahjat Alhammoud, Camille Desjardins, Sindy Sterckx, Stefan Adriaensen, Cameron Mackenzie, Ludovic Bourg, Sebastien Clerc, Steffen Dransfeld   +7 more
doaj   +1 more source

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