Stability of volcanic ash aggregates and break-up processes

Abstract Numerical modeling of ash plume dispersal is an important tool for forecasting and mitigating potential hazards from volcanic ash erupted during explosive volcanism. Recent tephra dispersal models have been expanded to account for dynamic ash aggregation processes. However, there are very f...

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Autores principales:	Sebastian B. Mueller, Ulrich Kueppers, Jonathan Ametsbichler, Corrado Cimarelli, Jonathan P. Merrison, Matthieu Poret, Fabian B. Wadsworth, Donald B. Dingwell
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/3216bbb0fd0a40a3b8dae3b1435cc574
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spelling	oai:doaj.org-article:3216bbb0fd0a40a3b8dae3b1435cc5742021-12-02T11:53:13ZStability of volcanic ash aggregates and break-up processes10.1038/s41598-017-07927-w2045-2322https://doaj.org/article/3216bbb0fd0a40a3b8dae3b1435cc5742017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07927-whttps://doaj.org/toc/2045-2322Abstract Numerical modeling of ash plume dispersal is an important tool for forecasting and mitigating potential hazards from volcanic ash erupted during explosive volcanism. Recent tephra dispersal models have been expanded to account for dynamic ash aggregation processes. However, there are very few studies on rates of disaggregation during transport. It follows that current models regard ash aggregation as irrevocable and may therefore overestimate aggregation-enhanced sedimentation. In this experimental study, we use industrial granulation techniques to artificially produce aggregates. We subject these to impact tests and evaluate their resistance to break-up processes. We find a dependence of aggregate stability on primary particle size distribution and solid particle binder concentration. We posit that our findings could be combined with eruption source parameters and implemented in future tephra dispersal models.Sebastian B. MuellerUlrich KueppersJonathan AmetsbichlerCorrado CimarelliJonathan P. MerrisonMatthieu PoretFabian B. WadsworthDonald B. DingwellNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Sebastian B. Mueller Ulrich Kueppers Jonathan Ametsbichler Corrado Cimarelli Jonathan P. Merrison Matthieu Poret Fabian B. Wadsworth Donald B. Dingwell Stability of volcanic ash aggregates and break-up processes
description	Abstract Numerical modeling of ash plume dispersal is an important tool for forecasting and mitigating potential hazards from volcanic ash erupted during explosive volcanism. Recent tephra dispersal models have been expanded to account for dynamic ash aggregation processes. However, there are very few studies on rates of disaggregation during transport. It follows that current models regard ash aggregation as irrevocable and may therefore overestimate aggregation-enhanced sedimentation. In this experimental study, we use industrial granulation techniques to artificially produce aggregates. We subject these to impact tests and evaluate their resistance to break-up processes. We find a dependence of aggregate stability on primary particle size distribution and solid particle binder concentration. We posit that our findings could be combined with eruption source parameters and implemented in future tephra dispersal models.
format	article
author	Sebastian B. Mueller Ulrich Kueppers Jonathan Ametsbichler Corrado Cimarelli Jonathan P. Merrison Matthieu Poret Fabian B. Wadsworth Donald B. Dingwell
author_facet	Sebastian B. Mueller Ulrich Kueppers Jonathan Ametsbichler Corrado Cimarelli Jonathan P. Merrison Matthieu Poret Fabian B. Wadsworth Donald B. Dingwell
author_sort	Sebastian B. Mueller
title	Stability of volcanic ash aggregates and break-up processes
title_short	Stability of volcanic ash aggregates and break-up processes
title_full	Stability of volcanic ash aggregates and break-up processes
title_fullStr	Stability of volcanic ash aggregates and break-up processes
title_full_unstemmed	Stability of volcanic ash aggregates and break-up processes
title_sort	stability of volcanic ash aggregates and break-up processes
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/3216bbb0fd0a40a3b8dae3b1435cc574
work_keys_str_mv	AT sebastianbmueller stabilityofvolcanicashaggregatesandbreakupprocesses AT ulrichkueppers stabilityofvolcanicashaggregatesandbreakupprocesses AT jonathanametsbichler stabilityofvolcanicashaggregatesandbreakupprocesses AT corradocimarelli stabilityofvolcanicashaggregatesandbreakupprocesses AT jonathanpmerrison stabilityofvolcanicashaggregatesandbreakupprocesses AT matthieuporet stabilityofvolcanicashaggregatesandbreakupprocesses AT fabianbwadsworth stabilityofvolcanicashaggregatesandbreakupprocesses AT donaldbdingwell stabilityofvolcanicashaggregatesandbreakupprocesses
_version_	1718394858265116672

Stability of volcanic ash aggregates and break-up processes

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