Rights statement: An edited version of this paper was published by AGU. Copyright 2016 American Geophysical Union.
Accepted author manuscript, 1.13 MB, PDF document
Available under license: CC BY: Creative Commons Attribution 4.0 International License
Rights statement: ©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.
Final published version, 1.02 MB, PDF document
Available under license: CC BY: Creative Commons Attribution 4.0 International License
Final published version
Licence: CC BY: Creative Commons Attribution 4.0 International License
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Conduit dynamics and post-explosion degassing on Stromboli
T2 - a combined UV camera and 1 numerical modelling treatment
AU - Pering, T.D.
AU - McGonigle, A. J. S.
AU - James, Michael Richard
AU - Tamburello, G.
AU - Aiuppa, A.
AU - Delle Donne, D.
AU - Ripepe, M.
N1 - 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.
PY - 2016/5/28
Y1 - 2016/5/28
N2 - 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.
AB - 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.
KW - strombolian-type eruptions
KW - gas slugs
KW - uv camera
KW - gas flux
KW - daughter bubbles
KW - computational fluid dynamics
U2 - 10.1002/2016GL069001
DO - 10.1002/2016GL069001
M3 - Journal article
VL - 43
SP - 5009
EP - 5016
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 10
ER -