Experimental simulations of volcanic ash resuspension by wind under the effects of atmospheric humidity
Ash deposited during volcanic eruptions can be resuspended by wind and become hazardous for health and infrastructure hours to decades after an eruption. Accurate resuspension forecasting requires accurate modelling of the threshold friction velocity of the volcanic particles (Uth*), which is the ke...
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ftingv:oai:www.earth-prints.org:2122/12272 2023-05-15T16:09:32+02:00 Experimental simulations of volcanic ash resuspension by wind under the effects of atmospheric humidity Del Bello, Elisabetta Taddeucci, Jacopo Merrison, Jonathan P Alois, Stefano Iversen, J. J. Scarlato, Piergiorgio Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia #PLACEHOLDER_PARENT_METADATA_VALUE# 2018-09-28 http://hdl.handle.net/2122/12272 https://www.nature.com/articles/s41598-018-32807-2 https://doi.org/10.1038/s41598-018-32807-2 en eng Scientific reports / 8 (2018) 2045-2322 http://hdl.handle.net/2122/12272 https://www.nature.com/articles/s41598-018-32807-2 doi:10.1038/s41598-018-32807-2 open detachment thresold volcanic ash wind friction velocity wind tunnel 04.08. Volcanology 01.01. Atmosphere article 2018 ftingv https://doi.org/10.1038/s41598-018-32807-2 2022-07-29T06:07:42Z Ash deposited during volcanic eruptions can be resuspended by wind and become hazardous for health and infrastructure hours to decades after an eruption. Accurate resuspension forecasting requires accurate modelling of the threshold friction velocity of the volcanic particles (Uth*), which is the key parameter controlling volcanic ash detachment by wind. Using an environmental wind tunnel facility this study provides much needed experimental data on volcanic particle resuspension, with the first systematic parameterization of Uth* for ash from the regions Campi Flegrei in Italy and also Eyjafjallajökull in Iceland. In this study atmospheric relative humidity (and related ash moisture content) was systematically varied, from <10% to >90%, which in the case of the Eyjafjallajökull fine ash (<63 μm) produced a twofold increase in Uth*. Using the Campi Flegrei fine ash (<63 μm) an increase in Uth* of only around a factor of 1.5 was observed. Reasonable agreement with force balance resuspension models was seen, which implied an increase in interparticle adhesion force of up to a factor of six due to high humidity. Our results imply that, contrary to dry conditions, one single modelling scheme may not satisfy the resuspension of volcanic ash from different eruptions under wet conditions. Funded by Europlanet 2020 RI under the European Union’s Horizon 2020 research and innovation programme and grant agreement No 654208, Conv. INGV-DPC B2 2016 - Centro di Pericolosità Vulcanica, and by the Marie Curie Initial Training Network ‘VERTIGO’, funded through the European Seventh Framework Programme (FP7 2007–2013) under Grant Agreement number 607905. Optical granunlometry, SEM and Helium Pycnometer analyses are from HP-HT Laboratories of Experimental Volcanology and Geophysics at INGV- Roma. Published 14509 5V. Processi eruttivi e post-eruttivi 6V. Pericolosità vulcanica e contributi alla stima del rischio JCR Journal Article in Journal/Newspaper Eyjafjallajökull Iceland Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) Scientific Reports 8 1 |
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Open Polar |
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Earth-Prints (Istituto Nazionale di Geofisica e Vulcanologia) |
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language |
English |
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detachment thresold volcanic ash wind friction velocity wind tunnel 04.08. Volcanology 01.01. Atmosphere |
spellingShingle |
detachment thresold volcanic ash wind friction velocity wind tunnel 04.08. Volcanology 01.01. Atmosphere Del Bello, Elisabetta Taddeucci, Jacopo Merrison, Jonathan P Alois, Stefano Iversen, J. J. Scarlato, Piergiorgio Experimental simulations of volcanic ash resuspension by wind under the effects of atmospheric humidity |
topic_facet |
detachment thresold volcanic ash wind friction velocity wind tunnel 04.08. Volcanology 01.01. Atmosphere |
description |
Ash deposited during volcanic eruptions can be resuspended by wind and become hazardous for health and infrastructure hours to decades after an eruption. Accurate resuspension forecasting requires accurate modelling of the threshold friction velocity of the volcanic particles (Uth*), which is the key parameter controlling volcanic ash detachment by wind. Using an environmental wind tunnel facility this study provides much needed experimental data on volcanic particle resuspension, with the first systematic parameterization of Uth* for ash from the regions Campi Flegrei in Italy and also Eyjafjallajökull in Iceland. In this study atmospheric relative humidity (and related ash moisture content) was systematically varied, from <10% to >90%, which in the case of the Eyjafjallajökull fine ash (<63 μm) produced a twofold increase in Uth*. Using the Campi Flegrei fine ash (<63 μm) an increase in Uth* of only around a factor of 1.5 was observed. Reasonable agreement with force balance resuspension models was seen, which implied an increase in interparticle adhesion force of up to a factor of six due to high humidity. Our results imply that, contrary to dry conditions, one single modelling scheme may not satisfy the resuspension of volcanic ash from different eruptions under wet conditions. Funded by Europlanet 2020 RI under the European Union’s Horizon 2020 research and innovation programme and grant agreement No 654208, Conv. INGV-DPC B2 2016 - Centro di Pericolosità Vulcanica, and by the Marie Curie Initial Training Network ‘VERTIGO’, funded through the European Seventh Framework Programme (FP7 2007–2013) under Grant Agreement number 607905. Optical granunlometry, SEM and Helium Pycnometer analyses are from HP-HT Laboratories of Experimental Volcanology and Geophysics at INGV- Roma. Published 14509 5V. Processi eruttivi e post-eruttivi 6V. Pericolosità vulcanica e contributi alla stima del rischio JCR Journal |
author2 |
Istituto Nazionale di Geofisica e Vulcanologia (INGV), Sezione Roma1, Roma, Italia #PLACEHOLDER_PARENT_METADATA_VALUE# |
format |
Article in Journal/Newspaper |
author |
Del Bello, Elisabetta Taddeucci, Jacopo Merrison, Jonathan P Alois, Stefano Iversen, J. J. Scarlato, Piergiorgio |
author_facet |
Del Bello, Elisabetta Taddeucci, Jacopo Merrison, Jonathan P Alois, Stefano Iversen, J. J. Scarlato, Piergiorgio |
author_sort |
Del Bello, Elisabetta |
title |
Experimental simulations of volcanic ash resuspension by wind under the effects of atmospheric humidity |
title_short |
Experimental simulations of volcanic ash resuspension by wind under the effects of atmospheric humidity |
title_full |
Experimental simulations of volcanic ash resuspension by wind under the effects of atmospheric humidity |
title_fullStr |
Experimental simulations of volcanic ash resuspension by wind under the effects of atmospheric humidity |
title_full_unstemmed |
Experimental simulations of volcanic ash resuspension by wind under the effects of atmospheric humidity |
title_sort |
experimental simulations of volcanic ash resuspension by wind under the effects of atmospheric humidity |
publishDate |
2018 |
url |
http://hdl.handle.net/2122/12272 https://www.nature.com/articles/s41598-018-32807-2 https://doi.org/10.1038/s41598-018-32807-2 |
genre |
Eyjafjallajökull Iceland |
genre_facet |
Eyjafjallajökull Iceland |
op_relation |
Scientific reports / 8 (2018) 2045-2322 http://hdl.handle.net/2122/12272 https://www.nature.com/articles/s41598-018-32807-2 doi:10.1038/s41598-018-32807-2 |
op_rights |
open |
op_doi |
https://doi.org/10.1038/s41598-018-32807-2 |
container_title |
Scientific Reports |
container_volume |
8 |
container_issue |
1 |
_version_ |
1766405404786425856 |