The fate of volcanic ash: premature or delayed sedimentation?
A large amount of volcanic ash produced during explosive volcanic eruptions has been found to sediment as aggregates of various types that typically reduce the associated residence time in the atmosphere (i.e., premature sedimentation). Nonetheless, speculations exist in the literature that aggregat...
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ftunivgeneve:oai:unige.ch:unige:150138 2023-05-15T16:09:33+02:00 The fate of volcanic ash: premature or delayed sedimentation? Rossi, Eduardo Bagheri, Gholamhossein Beckett, Frances Bonadonna, Costanza 2021 https://archive-ouverte.unige.ch/unige:150138 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1038/s41467-021-21568-8 unige:150138 https://archive-ouverte.unige.ch/unige:150138 info:eu-repo/semantics/openAccess ISSN: 2041-1723 Nature Communications, Vol. 12, No 1303 (2021) info:eu-repo/classification/ddc/550 Text info:eu-repo/semantics/article Article scientifique info:eu-repo/semantics/publishedVersion 2021 ftunivgeneve https://doi.org/10.1038/s41467-021-21568-8 2022-02-08T22:30:59Z A large amount of volcanic ash produced during explosive volcanic eruptions has been found to sediment as aggregates of various types that typically reduce the associated residence time in the atmosphere (i.e., premature sedimentation). Nonetheless, speculations exist in the literature that aggregation has the potential to also delay particle sedimentation (rafting effect) even though it has been considered unlikely so far. Here, we present the first theoretical description of rafting that demonstrates how delayed sedimentation may not only occur but is probably more common than previously thought. The fate of volcanic ash is here quantified for all kind of observed aggregates. As an application to the case study of the 2010 eruption of Eyjafjallajökull volcano (Iceland), we also show how rafting can theoretically increase the travel distances of particles between 138–710 μm. These findings have fundamental implications for hazard assessment of volcanic ash dispersal as well as for weather modeling. Article in Journal/Newspaper Eyjafjallajökull Iceland Université de Genève: Archive ouverte UNIGE Nature Communications 12 1 |
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English |
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info:eu-repo/classification/ddc/550 Rossi, Eduardo Bagheri, Gholamhossein Beckett, Frances Bonadonna, Costanza The fate of volcanic ash: premature or delayed sedimentation? |
topic_facet |
info:eu-repo/classification/ddc/550 |
description |
A large amount of volcanic ash produced during explosive volcanic eruptions has been found to sediment as aggregates of various types that typically reduce the associated residence time in the atmosphere (i.e., premature sedimentation). Nonetheless, speculations exist in the literature that aggregation has the potential to also delay particle sedimentation (rafting effect) even though it has been considered unlikely so far. Here, we present the first theoretical description of rafting that demonstrates how delayed sedimentation may not only occur but is probably more common than previously thought. The fate of volcanic ash is here quantified for all kind of observed aggregates. As an application to the case study of the 2010 eruption of Eyjafjallajökull volcano (Iceland), we also show how rafting can theoretically increase the travel distances of particles between 138–710 μm. These findings have fundamental implications for hazard assessment of volcanic ash dispersal as well as for weather modeling. |
format |
Article in Journal/Newspaper |
author |
Rossi, Eduardo Bagheri, Gholamhossein Beckett, Frances Bonadonna, Costanza |
author_facet |
Rossi, Eduardo Bagheri, Gholamhossein Beckett, Frances Bonadonna, Costanza |
author_sort |
Rossi, Eduardo |
title |
The fate of volcanic ash: premature or delayed sedimentation? |
title_short |
The fate of volcanic ash: premature or delayed sedimentation? |
title_full |
The fate of volcanic ash: premature or delayed sedimentation? |
title_fullStr |
The fate of volcanic ash: premature or delayed sedimentation? |
title_full_unstemmed |
The fate of volcanic ash: premature or delayed sedimentation? |
title_sort |
fate of volcanic ash: premature or delayed sedimentation? |
publishDate |
2021 |
url |
https://archive-ouverte.unige.ch/unige:150138 |
genre |
Eyjafjallajökull Iceland |
genre_facet |
Eyjafjallajökull Iceland |
op_source |
ISSN: 2041-1723 Nature Communications, Vol. 12, No 1303 (2021) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1038/s41467-021-21568-8 unige:150138 https://archive-ouverte.unige.ch/unige:150138 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s41467-021-21568-8 |
container_title |
Nature Communications |
container_volume |
12 |
container_issue |
1 |
_version_ |
1766405410240069632 |