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Coastal Microplastic Concentrations Increase After Hurricanes Helene and Milton (2024)
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Scientists found that hurricanes Helene and Milton stirred up and increased the amount of microplastics (tiny plastic bits smaller than a grain of rice) in Florida's coastal waters. This matters because these plastics can end up in seafood and drinking water sources, and as storms grow more frequent and intense, coastal communities may face rising exposure to this pollution after major weather events.
17 Microplastics (MPs) are small and transportable plastic pollutants ranging from 1 μm to 5 mm in 18 size. Recent studies have revealed elevated MP concentrations under severe weather conditions 19 such as tropical cyclones. However, despite the near-annual occurrence of tropical 20 cyclones/hurricanes in Florida, USA, the abundance and characteristics of MPs in Florida’s marine 21 environments under such conditions remain poorly understood. This study investigated the 22
More Papers Like This
Influence of Hurricane Helene on Microplastic Deposition in the Mountainous Southeastern United States
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When Hurricane Helene hit western North Carolina in 2024, it didn't just bring flooding, it also dumped 3 to 22 times more microplastic pollution onto the land than normal, likely swept in by storm winds from other areas. As climate change fuels more intense hurricanes, this suggests these storms could become a bigger source of microplastic contamination in soil, water, and potentially our food and air, making it an emerging health concern worth watching closely.
Influence of Hurricane Helene on Microplastic Deposition in the Mountainous Southeastern United States
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When Hurricane Helene hit the mountains of North Carolina in 2024, it didn't just bring catastrophic flooding, it also dumped 3 to 22 times more tiny plastic particles (microplastics) onto the land than normal, with one site's storm deposits making up nearly 19% of its yearly total. As extreme storms become more common with climate change, this matters because it means more plastic particles are getting into soil, water, and ecosystems in bursts, raising questions about how much of this plastic could eventually make its way into our food and water supplies.
Occurrence of Microplastic Pollution at Oyster Reefs and Other Coastal Sites in the Mississippi Sound, USA: Impacts of Freshwater Inflows from Flooding
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Researchers assessed microplastic pollution in water at oyster reef sites along the Mississippi Gulf Coast during a period of historic flooding that caused prolonged freshwater intrusion. The study found that flooding events increased microplastic concentrations in coastal waters, suggesting that extreme weather and freshwater inflows from rivers can intensify microplastic pollution in estuarine environments where filter-feeding shellfish are especially vulnerable.
Stratigraphic records of microplastic deposition in Puerto Rico coastal sediments: a focus on hurricane impacts
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Researchers examined sediment cores from two contrasting Puerto Rico coastlines and found that hurricane event layers correlate with spikes in microplastic concentration, suggesting storm-driven terrestrial flooding is a key mechanism delivering plastics to coastal sediments, while bioturbation appears to redistribute particles below pre-1950 sediment horizons.
The impact of extreme weather events on microplastics in intertidal sediments within a coastal embayment.
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Researchers sampled microplastics in intertidal sediments of a coastal embayment before and after an extreme weather event to capture temporal variability. Microplastic concentrations increased substantially following the event, suggesting storms mobilize plastic from terrestrial and coastal sources and can cause short-term spikes in marine microplastic loads.
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When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.