A particle tracking model approach to determine the dispersal of riverine plastic debris released into the Indian Ocean

Marine Pollution Bulletin, Journal Year: 2024, Volume and Issue: 199, P. 115985 - 115985

Published: Jan. 6, 2024

Although the Indian Ocean receives a large amount of land-based plastic waste, studies on pathways riverine debris are limited to date. Therefore, particle tracking model that included ocean surface currents, horizontal diffusion, Stokes drift, windage, and beaching/re-drifting processes was developed reproduce behavior in Ocean. The modeled particles were released domain based database. maximum abundance beached occurred during southwesterly monsoon season, particularly Bay Bengal. from rivers trapped northern unless both drift windage excluded transportation velocity. These results suggest until it fragmented into less buoyant small microplastics drifting subsurface layer, free at increasing depths.

Language: Английский

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Levels, spatial distributions, and provision of petroleum hydrocarbons and phthalates in sediments from Obhur lagoon, Red Sea coast of Saudi Arabia

Environmental Geochemistry and Health, Journal Year: 2024, Volume and Issue: 46(1)

Published: Jan. 1, 2024

Language: Английский

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Vertical Flux of Microplastics in the Deep Subtropical Pacific Ocean: Moored Sediment-Trap Observations within the Kuroshio Extension Recirculation Gyre

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(36), P. 16121 - 16130

Published: Aug. 26, 2024

The Kuroshio Extension recirculation gyre in the western North Pacific is an accumulation site of plastic litter transported by Current. A sediment trap was moored at a depth 4900 m Station KEO within gyre, and vertical flux microplastics sinking particles size <1 mm observed. Forty-one sediment-trap samples collected from July 1, 2014, to October 2, 2016, were analyzed with micro-Fourier transform infrared spectrometer detected all samples. Seventeen polymer types identified, 90% less than 100 μm size. Microplastic driven action biological pump, which turn seasonal variations solar radiation increased surface primary production typical spring season. mass varied 4.5 × 10–3 0.38 mg m–2 day–1 during sampling period, mean standard deviation 0.054 ± 0.075 day–1. Extrapolating annual microplastic entire it estimated that 0.028 million metric tons are annually this area.

Language: Английский

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Pelagic distribution of plastic debris (> 500 µm) and marine organisms in the upper layer of the North Atlantic Ocean

Scientific Reports, Journal Year: 2022, Volume and Issue: 12(1)

Published: Aug. 11, 2022

At present, the distribution of plastic debris in ocean water column remains largely unknown. Such information, however, is required to assess exposure marine organisms pollution as well calculate mass balance. Here, we provide profiles (0-300 m depth) (0.05-5 cm size) concentration and key planktonic species from eastern North Atlantic Ocean. The amount decreases rapidly upper few meters, ~ 1 item/m3 (~ 1000 µg/m3) at sea surface values 0.001-0.01 items/m3 0.1-10 300 depth. Ratios plankton varied between 10-5 particles per individual with highest ratios typically found waters. We further observed that pelagic were generally higher below subtropical gyre compared those more coastal ecosystems. Lastly, show (non-gelatinous) could be high 102-107 when considering reported concentrations small microplastics < 100 μm. Plastic our oceans may therefore soon exceed estimated safe for many species.

Language: Английский

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Microplastics in coastal farmed oyster (Crassostrea angulata) shells: Abundance, characteristics, and diversity

Marine Pollution Bulletin, Journal Year: 2023, Volume and Issue: 194, P. 115228 - 115228

Published: Aug. 4, 2023

Language: Английский

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