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Extended SO2 outgas...
Extended SO2 outgassing from the 2014–2015 Holuhraun lava flow field, Iceland
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- Simmons, Isla (author)
- University of Edinburgh
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- Pfeffer, M. A. (author)
- Icelandic Meteorological Office
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- Calder, Eliza (author)
- University of Edinburgh
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- Galle, Bo, 1952 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Arellano, Santiago, 1981 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Coppola, D. (author)
- Universita degli Studi di Torino,University of Turin
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- Barsotti, S. (author)
- Icelandic Meteorological Office
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(creator_code:org_t)
- 2017-10-27
- 2017
- English.
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In: Bulletin of Volcanology. - : Springer Science and Business Media LLC. - 0258-8900 .- 1432-0819. ; 79:11
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Abstract
Subject headings
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- The 2014–2015 Holuhraun eruption was the largest fissure eruption in Iceland in the last 200 years. This flood basalt eruption produced ~ 1.6 km3 of lava, forming a lava flow field covering an area of ~ 84 km2. Over the 6-month course of the eruption, ~ 11 Mt of SO2 were released from the eruptive vents as well as from the cooling lava flow field. This work examines the post-eruption SO2 flux emitted by the Holuhraun lava flow field, providing the first study of the extent and relative importance of the outgassing of a lava flow field after emplacement. We use data from a scanning differential optical absorption spectroscopy (DOAS) instrument installed at the eruption site to monitor the flux of SO2. In this study, we propose a new method to estimate the SO2 emissions from the lava flow field, based on the characteristic shape of the scanned column density distribution of a homogenous source close to the ground. Post-eruption outgassing of the lava flow field continued for at least 3 months after the end of the eruption, with SO2 flux between < 1 and 9 kg/s. The lava flow field post-eruption emissions were not a significant contributor to the total SO2 released during the eruption; however, the lava flow field was still an important polluter and caused high concentrations of SO2 at ground level after lava effusion ceased.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Keyword
- SO2
- doas
- post-eruption outgassing
- lava
Publication and Content Type
- art (subject category)
- ref (subject category)
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