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Microplastics in the southern ocean and antarctic snow
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Researchers sampled sub-surface seawater (4-5 m depth) aboard a research vessel and snow collected near five Russian Antarctic stations during the 2022 Russian Antarctic Expedition (RAE), filtering at least 2 m3 of seawater per sample and 5 litres of snow per sample for microplastic analysis. The study characterised microplastic occurrence and composition in both the Southern Ocean water column and Antarctic snow, contributing baseline data on plastic contamination in one of the most remote regions on Earth.
Snow near Russian Antarctic stations and sub-surface waters of adjacent Southern Ocean were studied in 2022 in frames of Russian Antarctic Expedition (RAE). Sub-surface seawater (4-5 m) was sampled onboard RV "Akademik Treshnikov" by the built-in vessel flow-through filtering system with mesh-size 100 microns making at least 2 m3 of filtered seawater for each sample. Snow of various age during seasonal works (from Dec to May) was sampled near 5 stations: 5 L of snow for each sample. All samples were treated in the clean lab conditions in St.Petersburg in PlasticLab, including the field and procedural blanks, and contamination control at each stage of work. Laboratory treatment included Fenton reagent protocol for snow and KOH protocol for seawater samples, with 100 Also see: https://micro2024.sciencesconf.org/551278/document
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Microplastics in the southern ocean and antarctic snow
AI summary Read the abstract
Researchers sampled microplastics from snow near Russian Antarctic stations and sub-surface Southern Ocean waters (4-5 m depth) in 2022 during the Russian Antarctic Expedition, using a vessel flow-through filtering system and collecting 5 L snow samples from five stations. Samples were processed using Fenton reagent and KOH protocols under strict contamination controls in a dedicated clean lab.
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Researchers characterized microplastic distribution in both surface and subsurface Antarctic seawater, finding plastic contamination present at multiple depths and dominated by fibers and fragments, highlighting that even remote polar waters are affected by plastic pollution.
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Microplastic pollution was investigated in deep-sea sediments from Antarctic and Southern Ocean regions, finding high abundances that varied among sites. The study confirmed that microplastics are accumulating in the remote Antarctic deep-sea environment, with evidence going back to scientific literature from the 1980s that has accelerated in recent years.
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