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| Titel |
UV and IR measurements of sulphur dioxide emissions during and after the 2014-2015 Bárðarbunga eruption, Iceland |
| VerfasserIn |
Isla C. Simmons, Rachel C. W. Whitty, Melissa A. Pfeffer, Helen Thomas, Bo Galle, Eliza Calder, Santiago Arellano, Fred Prata, Hugh C. Pumphrey |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250128742
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| Publikation (Nr.) |
 EGU/EGU2016-8764.pdf |
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| Zusammenfassung |
| A basaltic fissure eruption of the Bárðarbunga volcanic system, Iceland, occurred from 31st
August 2014 until 28th February 2015. This flood basalt eruption produced 1.6 km3
of lava and emitted sulphur dioxide (SO2) from the vents at rates of up to 3800
kg/s forming an eruption plume that could easily be detected from space. SO2 was
also released by the cooling lava flows forming a low level haze. SO2 emissions
were monitored using multiple techniques including scanning differential optical
absorption spectrometers (DOAS), mobile DOAS traverses, and a NicAIR II infrared
camera.
UV DOAS data have been processed to distinguish the SO2 released by the degassing lava
field as it cooled, both during and after the eruption. Initial results show that during February,
the final month of the eruption, the lava field released about 3 kg/s of SO2. The lava field
continued to emit detectable levels of SO2 at lower quantities in March, following the end of
the eruption.
Brightness temperature differences using 8.62 and 10.87 μm channels on the IR camera have
been processed to calculate the column amounts of SO2 within the eruption plume. SO2
path lengths of over 700 ppm-m have been retrieved in November. This has been
achieved despite the challenges of high H2O concentrations in the plume and high gas
concentrations above the lava field. Poor meteorological conditions often resulted in a lack
of clear sky within the images causing difficulties constraining background SO2
levels. |
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