A new perspective on volcanic particle sedimentation and aggregation
The recent volcanic crisis of 2010 Eyjafjallajökull eruption (Iceland) has demonstrated the widespread impact that even small-moderate explosive volcanic eruptions can have on our society. As a matter of fact the long range prediction of volcanic ash is still affected by our poor understanding of si...
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ftunivgeneve:oai:unige.ch:aou:unige:110490 2023-10-01T03:55:50+02:00 A new perspective on volcanic particle sedimentation and aggregation Rossi, Eduardo Bonadonna, Costanza 2018 https://archive-ouverte.unige.ch/unige:110490 https://doi.org/10.13097/archive-ouverte/unige:110490 eng eng Université de Genève https://archive-ouverte.unige.ch/unige:110490 unige:110490 doi:10.13097/archive-ouverte/unige:110490 urn:nbn:ch:unige-1104900 info:eu-repo/semantics/openAccess info:eu-repo/classification/ddc/550 info:eu-repo/semantics/doctoralThesis Text Thèse 2018 ftunivgeneve https://doi.org/10.13097/archive-ouverte/unige:110490 2023-09-07T07:47:11Z The recent volcanic crisis of 2010 Eyjafjallajökull eruption (Iceland) has demonstrated the widespread impact that even small-moderate explosive volcanic eruptions can have on our society. As a matter of fact the long range prediction of volcanic ash is still affected by our poor understanding of size-selective sedimentation processes, e.g. particle aggregation. Main objectives of this thesis include to: i) develop a robust mathematical framework to theoretically describe ash aggregation, based on field, theoretical and experimental constraints. This new theoretical framework, named the Generalized Fixed Pivot Technique (GFPT), can be applied in different contexts and disciplines; ii) better characterize the physics of ash aggregation, providing a coherent formalization. This resulted in a new parameterization of crucial physical processes, such as the collision rate and the sticking efficiency of collisional processes; and iii) improve the description of large clasts sedimentation in order to better characterize the plume height of volcanic eruptions. Doctoral or Postdoctoral Thesis Eyjafjallajökull Iceland Université de Genève: Archive ouverte UNIGE Pivot ENVELOPE(-30.239,-30.239,-80.667,-80.667) |
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English |
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info:eu-repo/classification/ddc/550 |
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info:eu-repo/classification/ddc/550 Rossi, Eduardo A new perspective on volcanic particle sedimentation and aggregation |
topic_facet |
info:eu-repo/classification/ddc/550 |
description |
The recent volcanic crisis of 2010 Eyjafjallajökull eruption (Iceland) has demonstrated the widespread impact that even small-moderate explosive volcanic eruptions can have on our society. As a matter of fact the long range prediction of volcanic ash is still affected by our poor understanding of size-selective sedimentation processes, e.g. particle aggregation. Main objectives of this thesis include to: i) develop a robust mathematical framework to theoretically describe ash aggregation, based on field, theoretical and experimental constraints. This new theoretical framework, named the Generalized Fixed Pivot Technique (GFPT), can be applied in different contexts and disciplines; ii) better characterize the physics of ash aggregation, providing a coherent formalization. This resulted in a new parameterization of crucial physical processes, such as the collision rate and the sticking efficiency of collisional processes; and iii) improve the description of large clasts sedimentation in order to better characterize the plume height of volcanic eruptions. |
author2 |
Bonadonna, Costanza |
format |
Doctoral or Postdoctoral Thesis |
author |
Rossi, Eduardo |
author_facet |
Rossi, Eduardo |
author_sort |
Rossi, Eduardo |
title |
A new perspective on volcanic particle sedimentation and aggregation |
title_short |
A new perspective on volcanic particle sedimentation and aggregation |
title_full |
A new perspective on volcanic particle sedimentation and aggregation |
title_fullStr |
A new perspective on volcanic particle sedimentation and aggregation |
title_full_unstemmed |
A new perspective on volcanic particle sedimentation and aggregation |
title_sort |
new perspective on volcanic particle sedimentation and aggregation |
publisher |
Université de Genève |
publishDate |
2018 |
url |
https://archive-ouverte.unige.ch/unige:110490 https://doi.org/10.13097/archive-ouverte/unige:110490 |
long_lat |
ENVELOPE(-30.239,-30.239,-80.667,-80.667) |
geographic |
Pivot |
geographic_facet |
Pivot |
genre |
Eyjafjallajökull Iceland |
genre_facet |
Eyjafjallajökull Iceland |
op_relation |
https://archive-ouverte.unige.ch/unige:110490 unige:110490 doi:10.13097/archive-ouverte/unige:110490 urn:nbn:ch:unige-1104900 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.13097/archive-ouverte/unige:110490 |
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1778524618694328320 |