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61,005 resultsShowing papers similar to Floating Riverine Litter Flux to the White Sea: Seasonal Changes in Abundance and Composition
ClearAssessment of seasonal variability of input of microplastics from the Northern Dvina River to the Arctic Ocean
Seasonal monitoring of floating microplastics and mesoplastics on the Northern Dvina River in the European Arctic was conducted at its mouth, finding that plastic loads varied substantially across seasons with peak concentrations during snowmelt and high-flow periods. The study estimates plastic inputs to the White Sea and Arctic Ocean from one of the largest rivers draining populated subarctic regions.
Toward a Harmonized Approach for Monitoring of Riverine Floating Macro Litter Inputs to the Marine Environment
Researchers reviewed approaches toward a harmonised monitoring methodology for riverine floating macro litter inputs to the sea, addressing the lack of standardised methods that currently prevents quantification of freshwater litter fluxes and hinders effective environmental regulation.
Modelling floating riverine litter in the south-eastern Bay of Biscay: a regional distribution from a seasonal perspective
Researchers modeled the seasonal behavior of floating litter released by rivers into the south-eastern Bay of Biscay using riverine litter characterization data, surface drifters, high-frequency radar observations, and Lagrangian simulations, providing a regional seasonal distribution analysis of floating marine litter transport from riverine sources.
Importance of seasonal sea ice in the western Arctic ocean to the Arctic and global microplastic budgets
This study quantified the role of western Arctic sea ice as a seasonal sink and transport vector for microplastics, finding that atmospheric deposition and sea ice dynamics contribute significantly to the regional and global microplastic budget.
Monthly Year-Round Characteristics and Ocean Export of Riverine Organic Matter: Relationship with Microplastics
Researchers conducted year-round monthly sampling of a river system to characterize the quantity and composition of organic matter exported to the ocean, examining how microplastics contribute to allochthonous carbon fluxes and how their transport co-varies with seasonal changes in riverine organic matter dynamics.
Microplastics in the Eurasian Arctic surface water: main sources and drivers of spatiotemporal variability
Researchers conducted the most extensive survey to date of floating microplastics in the Eurasian Arctic Ocean, collecting 220 surface and 180 subsurface water samples across six research cruises from 2019 to 2022 in the Barents, Kara, Laptev, and East-Siberian Seas using Neuston nets. The study characterised the main sources and spatiotemporal drivers of microplastic distribution in this sensitive polar region, with findings relevant to understanding the Arctic as a sink for global plastic pollution.
Managing plastic pollution in the Arctic ocean: An integrated quantitative flux estimate and policy study
Researchers quantified the amount of plastic entering and leaving the Arctic Ocean through rivers, sea ice, and ocean currents, and assessed the gap between existing pollution levels and current policy measures. The study found that Arctic plastic pollution is likely underestimated and that current regulations are insufficient to prevent further accumulation in this sensitive ecosystem.
Microplastics in Surface Waters of the Russian Arctic Seas: Distribution, Concentration, Identification, and Eco-Risks for Fish
Microplastics were detected across surface waters of the Russian Arctic seas, with concentrations and polymer types varying by region and season. The findings document that even high-latitude Arctic waters are not spared from microplastic contamination, likely transported by ocean currents and rivers.
On the quantity and composition of floating plastic debris entering and leaving the Tamar Estuary, Southwest England
Researchers estimated the quantity and composition of floating plastic entering and leaving the North Sea, using measurements and modeling to track how much plastic crosses the sea's boundaries through oceanic and atmospheric pathways.
New insights into the role of sediments in microplastic inputs from the Northern Dvina River (Russia) to the White and Barents Seas
Researchers analyzed microplastic contamination in the sediments of the Northern Dvina River, a major source of plastic pollution entering the White and Barents Seas. Using advanced analytical methods, the study found up to 350 mg/kg of microplastics in sediments, with the river branching area forming a pollution hotspot. Evidence indicates that river sediments play a critical role as transfer pathways for microplastics moving from inland sources to Arctic marine environments.
Transport and accumulation of floating marine litter in the Black Sea: insights from numerical modeling
Researchers used numerical modeling to simulate how floating marine litter disperses and accumulates in the Black Sea, a semi-enclosed basin with slow water turnover. They found that major European rivers are significant sources of litter input, and that wind-driven wave action plays an important role in where debris concentrates. The study provides insights into predicting marine litter accumulation patterns that could help target cleanup and prevention efforts.
Plastic litter in the European Arctic: What do we know?
Researchers reviewed available evidence on plastic litter in the European Arctic, finding that despite limited data, microplastics are present in every environmental compartment — including sea ice — and are being transported to this remote region from distant sources via ocean currents and wind.
Microplastics in the Eurasian Arctic surface water: main sources and drivers of spatiotemporal variability
Researchers conducted the most extensive survey of floating microplastics in the Eurasian Arctic to date, collecting 220 surface water and 180 subsurface water samples across the Barents, Kara, Laptev, and East-Siberian seas during six cruises from 2019 to 2022. They found a strong west-to-east gradient in microplastic pollution, declining from 19.0 micrograms per cubic meter in the Barents Sea to 2.0 micrograms per cubic meter in the East-Siberian Sea, with the Kara Gate Strait showing the highest concentration at 640 micrograms per cubic meter, suggesting the Barents Sea as the primary source of microplastics in the Siberian Arctic.
Observations of floating anthropogenic litter in the Barents Sea and Fram Strait, Arctic
Ship and helicopter surveys in the Barents Sea and Fram Strait confirmed the presence of anthropogenic litter, mostly plastic, in these remote Arctic waters. The findings indicate that ocean currents transport plastic debris from distant sources to even the most isolated polar seas, leaving no part of the global ocean untouched.
Microplastics in FLOW: Seasonal patterns in major Latvian rivers
Researchers collected surface water samples from four major Latvian rivers flowing into the Gulf of Riga across six seasonal sampling events from spring 2022 to summer 2023 using a Manta net. Microplastic concentrations varied significantly by season and river, with highest levels during snowmelt and storm events, revealing that hydrological dynamics are a major driver of river microplastic flux.
Seasonal variations in the sinking fluxes of microplastics and textile fibers in an Arctic fjord (Kongsfjorden, Svalbard)
Researchers measured seasonal variations in microplastic and microfiber sinking fluxes in Kongsfjorden fjord, Svalbard, using a moored sediment trap rotating monthly over one year from September 2021 to September 2022. By capturing sinking particles at 61 m depth where Atlantic water masses interact with glacial melt fronts, they documented temporal variability in vertical microplastic export and identified seasonal drivers affecting particle flux to the Arctic seafloor.
Spatiotemporal trends in microplastic pollution of surface waters of the Eurasian Arctic
Researchers conducted the most extensive survey to date of floating microplastics in the Eurasian Arctic Ocean, collecting 200 surface water samples across four Arctic seas over four years using standardized methods. The study provides a crucial baseline for tracking whether microplastic contamination in this remote and climate-sensitive ocean region is increasing over time, which matters because Arctic ecosystems are already under severe stress and microplastics can further harm the marine food web from plankton to Arctic wildlife.
Microplastics distribution in the Eurasian Arctic is affected by Atlantic waters and Siberian rivers
Analysis of 60 water samples from the Eurasian Arctic found average microplastic concentrations of 0.004 items/m³ in surface net samples and 0.8 items/m³ in subsurface pump samples, with particle type and abundance differing significantly between Atlantic water masses and Siberian river plumes.
Significant variability of structure and predictability of Arctic Ocean surface pathways affects basin-wide connectivity
Researchers used high-resolution ocean models to study how floating materials — including pollutants like microplastics — drift across the Arctic Ocean, finding that surface pathways have high year-to-year variability and that fine-scale ocean currents strongly affect where these materials ultimately travel and accumulate.
Origin and intra-annual variability of vertical microplastic fluxes in Fram Strait, Arctic Ocean
Sediment trap data from Fram Strait in the Arctic Ocean revealed temporal and spatial variability in vertical microplastic fluxes, with MP concentrations and composition varying seasonally. The study provided evidence that the Arctic deep sea receives a continuous supply of MPs via vertical settling, driven by ocean circulation and ice dynamics.
Microplastics in Svalbard fjords: influence of hydrodynamics and local pollution sources
Researchers studied the distribution of surface and subsurface microplastics in Svalbard fjords over three years (July 2021-2023), investigating how hydrodynamics, river discharge, and local pollution sources influence microplastic fate in Arctic coastal waters.
Floating microplastics in Svalbard fjords: High spatial variability requires methodological consistency in estuarine systems
This study quantified floating microplastics in fjords around Svalbard, finding high spatial variability that necessitates dense sampling strategies, with concentrations influenced by sea ice dynamics and ocean current patterns.
Terrestrial and Aquatic Controls on the Movement of Material Transported Hydrologically Across Vast Arctic River Basins
This study investigated how organic matter and nutrients are processed in Arctic river systems before reaching the ocean, finding that landscape-level factors like soil type and vegetation play a larger role than in-stream microbial processing. Understanding how Arctic rivers transport carbon and nutrients is relevant for tracking how microplastics and other land-based pollutants reach Arctic seas.
Wasting the North Sea? – A field-based assessment of anthropogenic macrolitter loads and emission rates of three German tributaries
Researchers conducted field surveys of anthropogenic macrolitter in three major German North Sea tributaries — the Ems, Weser, and Elbe — across four river compartments, providing quantitative emission rate estimates to complement microplastic-focused global models.