Workshop on Wind-remobilisation processes of volcanic ash, Consensual Document

By Costanza Bonadonna1, Paul A Jarvis1, Lucia Dominguez1, Corine Frischknecht1, Pablo Forte2, Donaldo Bran3, Rigoberto Aguilar4, Frances Beckett5, Manuela Elissondo6, Jack Gillies7, ulrich kueppers8, Jonathan Merrison9, Nick Varley10, Kristi L Wallace11

1. University of Geneva, Switzerland 2. University of Buenos Aires, Argentina 3. INTA, Argentina 4. Volcanological Observatory of INGEMMET, Peru 5. UK Metoffice, UK 6. SEGEMAR, Argentina 7. Desert Research Institute, US 8. Ludwig-Maximilians-Universitaet Munich (LMU), Germany 9. Aarhus University, DK 10. Universidad de Colima, Mexico 11. U.S. Geological Survey/Alaska Volcano Observatory

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Explosive volcanic eruptions can eject large quantities of tephra into the atmosphere that can be dispersed and deposited over wide areas. Whilst the hazardous consequences of primary tephra fallout are well known, subsequent remobilisation of ash by aeolian processes can continue to present an underestimated hazard on timescales of months to even millennia after the eruption. Although wind-remobilisation of ash was first recognised following the 1980 eruption of Mt. St. Helens, USA, ash remobilisation events in recent years, from the deposits of multiple volcanic eruptions (e.g. Grímsvötn, Iceland; Cordón Caulle, Chile; and Mt. Katmai, USA), have highlighted the high frequency of the phenomenon and the potential consequences for human infrastructure and health. Consequently, more than fifty scientists, including staff from volcano observatories and volcanic ash advisory centres (VAACs), and academic researchers from fields such as volcanology, aeolian processes and soil sciences, convened at the Bariloche headquarters of the Argentinian National Institute of Agricultural Technology (INTA) to discuss the current ‘state of the art’ for monitoring, modelling and understanding ash remobilisation and future issues that need to be addressed.

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  • Costanza Bonadonna; Paul A Jarvis; Lucia Dominguez; Corine Frischknecht; Pablo Forte; Donaldo Bran; Rigoberto Aguilar; Frances Beckett; Manuela Elissondo; Jack Gillies; ulrich kueppers; Jonathan Merrison; Nick Varley; Kristi L Wallace (2020), "Workshop on Wind-remobilisation processes of volcanic ash, Consensual Document,"

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