Article
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Tier 2
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Original research — experimental, observational, or case-control study. Direct primary evidence.
Marine & Wildlife
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Coastal ocean dynamics reduce the export of microplastics to the open ocean
The Science of The Total Environment2020
99 citations
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Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count.
Score: 40
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0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Researchers used coupled numerical ocean circulation modeling to investigate the fate of microplastics in the East China Seas, finding that coastal dynamics — including upwelling, eddies, and shelf circulation — significantly reduce the export of microplastics from coastal zones to the open ocean. The study suggests that coastal retention processes may explain some of the discrepancy between estimated plastic inputs and open-ocean inventories.
Study Type
Environmental
Huge amounts of plastic waste are dumped into the ocean every year, forming large Garbage Patches. Countless microplastics, originating from fragmentation, weathering of larger objects or primary sources, pose a widespread ecological risk. In this study, the dispersion of suspended and floating microplastic particles in the East China Seas (ECSs) and adjacent seas was investigated via a coupled numerical model that included a Lagrangian particle tracking module. The role of tidal dynamics was considered in transporting the microplastic particles in the ECSs and adjacent seas. The results highlighted significant differences between the transport of suspended and floating microplastic particles. Although microplastic particles originating from different source areas followed different pathways, the Taiwan Strait, the Tokara Strait and the Tsushima Strait were identified as the major delivery channels. Of these, the Taiwan Strait played the most important role in the export of near-surface floating microplastic particles from the ECSs. The results showed that only a small fraction of the microplastic particles produced from the coastal waters of China (~18%) and Korea (~14%) entered the Pacific Ocean. However, nearly all of the microplastic particles originating from the west and south coasts of Kyushu Island entered the Pacific Ocean.