publication . Article . 2017

Round Volcanic Particles in Lightning

Fabian B. Wadsworth; Jérémie Vasseur; Edward W. Llewellin; Kimberly Genareau; Corrado Cimarelli; Donald B. Dingwell;
Open Access
  • Published: 01 Mar 2017
  • Publisher: American Geophysical Union
  • Country: United Kingdom
Abstract
Abstract Volcanic ash particles can be remelted by the high temperatures induced in volcanic lightning discharges. The molten particles can round under surface tension then quench to produce glass spheres. Melting and rounding timescales for volcanic materials are strongly dependent on heating duration and peak temperature and are shorter for small particles than for large particles. Therefore, the size distribution of glass spheres recovered from ash deposits potentially record the short duration, high‐temperature conditions of volcanic lightning discharges, which are hard to measure directly. We use a 1‐D numerical solution to the heat equation to determine th...
Subjects
arXiv: Physics::GeophysicsPhysics::Atmospheric and Oceanic Physics
free text keywords: Chemistry and Physics of Minerals and Rocks/Volcanology, Atmospheric Composition and Structure, Volcanic Effects, Aerosols and Particles, Pollution: Urban and Regional, Natural Hazards, Atmospheric, Geological, Oceanography: Biological and Chemical, Aerosols, Paleoceanography, Seismology, Volcano Seismology, Tectonophysics, Heat Generation and Transport, Volcanology, Atmospheric Effects, Volcano Monitoring, Explosive Volcanism, Research Article, Research Articles, heat equation, spherules, volcanic lightning, capillarity, surface tension, Geology, Volcanic ash, Volcano, geography.geographical_feature_category, geography, Particle, Geophysics, Biot number, Mineralogy, Dirty thunderstorm, Heat transfer, Lightning
Funded by
RCUK| Reconstructing eruptive processes from volatile distribution in volcanic glass
Project
  • Funder: Research Council UK (RCUK)
  • Project Code: NE/N002954/1
  • Funding stream: NERC
,
EC| EVOKES
Project
EVOKES
Explosive Volcanism in the Earth System
  • Funder: European Commission (EC)
  • Project Code: 247076
  • Funding stream: FP7 | SP2 | ERC
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