Conduit dynamics and post-explosion degassing on Stromboli:a combined UV camera and 1 numerical modelling treatment

Pering, T.D. and McGonigle, A. J. S. and James, Michael Richard and Tamburello, G. and Aiuppa, A. and Delle Donne, D. and Ripepe, M. (2016) Conduit dynamics and post-explosion degassing on Stromboli:a combined UV camera and 1 numerical modelling treatment. Geophysical Research Letters, 43 (10). pp. 5009-5016. ISSN 0094-8276

[img]
Preview
PDF (Pering_et_al-2016-Geophysical_Research_Letters)
Pering_et_al_2016_Geophysical_Research_Letters.pdf - Accepted Version
Available under License Creative Commons Attribution.

Download (1MB)
[img]
Preview
PDF (Pering_et_al-2016-Geophysical_Research_Letters)
Pering_et_al_2016_Geophysical_Research_Letters.pdf - Published Version
Available under License Creative Commons Attribution.

Download (1MB)

Abstract

Recent gas flux measurements have shown that strombolian explosions are often followed by periods of elevated flux, or ‘gas codas’, with durations of order a minute. Here, we present UV camera data from 200 events recorded at Stromboli volcano to constrain the nature of these codas for the first time, providing estimates for combined explosion plus coda SO2 masses of ≈ 18 – 225 kg. Numerical simulations of gas slug ascent show that substantial proportions of the initial gas mass can be distributed into a train of ‘daughter bubbles’ released from the base of the slug, which we suggest, generate the codas, on bursting at the surface. This process could also cause transitioning of slugs into cap bubbles, significantly reducing explosivity. This study is the first attempt to combine high temporal resolution gas flux data with numerical simulations of conduit gas flow to investigate volcanic degassing dynamics.

Item Type:
Journal Article
Journal or Publication Title:
Geophysical Research Letters
Additional Information:
An edited version of this paper was published by AGU. Copyright 2016 American Geophysical Union. ©2016. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1900
Subjects:
ID Code:
79695
Deposited By:
Deposited On:
23 May 2016 10:16
Refereed?:
Yes
Published?:
Published
Last Modified:
25 Sep 2020 02:33