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- W2896090615 abstract "Abstract Even modest ash-rich volcanic eruptions can severely impact a range of human activities, especially air travel. The dispersal of ash in these eruptions depends critically on aggregation and sedimentation processes – however these are difficult to quantify in volcanic plumes. Here, we image ash dynamics from mild explosive activity at Santiaguito Volcano, Guatemala, by measuring the depolarisation of scattered sunlight by non-spherical ash particles, allowing the dynamics of diffuse ash plumes to be investigated with high temporal resolution (>1 Hz). We measure the ash settling velocity downwind from the main plume, and compare it directly with ground sampled ash particles, finding good agreement with a sedimentation model based on particle size. Our new, cost-effective technique leverages existing technology, opening a new frontier of integrated ash visualisation and ground collection studies which could test models of ash coagulation and sedimentation, leading to improved ash dispersion forecasts. This will provide risk managers with improved data quality on ash location, reducing the economic and societal impacts of future ash-rich eruptions." @default.
- W2896090615 created "2018-10-26" @default.
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- W2896090615 date "2018-10-24" @default.
- W2896090615 modified "2023-10-12" @default.
- W2896090615 title "Quantification of ash sedimentation dynamics through depolarisation imaging with AshCam" @default.
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- W2896090615 doi "https://doi.org/10.1038/s41598-018-34110-6" @default.
- W2896090615 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6200762" @default.
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