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Journal article
Bombs behaving badly; unexpected trajectories and cooling of volcanic projectiles
Bulletin of volcanology, v 74(8), pp 1849-1858
01 Oct 2012
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
We collected thermal infrared video of two explosive eruptions at Stromboli in June 2008 and manually traced the trajectories of 95 particles launched during two eruptions. We found that 10-15 % of the analyzed trajectories deviated from predicted curves due to collisions, causing one particle to travel horizontally more than twice as far as expected. Furthermore, we observed an oscillatory cooling behavior for the airborne pyroclasts, with a median period of 0.46 s. Measured cooling was typically much faster than model-predicted cooling with discrepancies of up to 40 % between measured cooling and theoretical modeling. We interpret the measured cooling curves as resulting from the spinning and twisting and tearing of particles during travel: the periodic re-exposing of the hotter core of the pyroclasts to the atmosphere may cause the observed oscillations, and the spinning may accelerate cooling by enhancing convective heat transfer. Current volcanic trajectory and cooling models do not account for projectile collisions, spinning, or tearing and can thus severely underestimate the maximum landing distance and cooling rates of large pyroclasts. Copyright 2012 Springer-Verlag
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Details
- Title
- Bombs behaving badly; unexpected trajectories and cooling of volcanic projectiles
- Creators
- Loyc Vanderkluysen - University of Hawaiʻi at MānoaAndrew J. L. Harris - Universite Blaise Pascal FRA FranceKarim Kelfoun - Laboratoire Magmas et VolcansCostanza Bonadonna - University of GenevaMaurizio Ripepe - University of Florence
- Publication Details
- Bulletin of volcanology, v 74(8), pp 1849-1858
- Publisher
- Springer International [for the] International Association of Volcanology and Chemistry of the Earth's Interior (IAVCEI)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Biodiversity, Earth, and Environmental Science (BEES)
- Web of Science ID
- WOS:000308955200005
- Scopus ID
- 2-s2.0-84866487578
- Other Identifier
- 991021015468104721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Geosciences, Multidisciplinary