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The dual-beam mini-DOAS technique-measurements of volcanic gas emission, plume height and plume speed with a single instrument
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2009 (English)In: Bulletin of Volcanology, ISSN 0258-8900, E-ISSN 1432-0819, Vol. 71, no 7, 747-751 p.Article in journal (Refereed) Published
Abstract [en]

The largest error in determining volcanic gas fluxes using ground based optical remote sensing instruments is typically the determination of the plume speed, and in the case of fixed scanning instruments also the plume height. We here present a newly developed technique capable of measuring plume height, plume speed and gas flux using one single instrument by simultaneously collecting scattered sunlight in two directions. The angle between the two measurement directions is fixed, removing the need for time consuming in-field calibrations. The plume height and gas flux is measured by traversing the plume and the plume speed is measured by performing a stationary measurement underneath the plume. The instrument was tested in a field campaign in May 2005 at Mt. Etna, Italy, where the measured results are compared to wind fields derived from a meso-scale meteorological model (MM5). The test and comparison show that the instrument is functioning and capable of estimating wind speed at the plume height.

Place, publisher, year, edition, pages
2009. Vol. 71, no 7, 747-751 p.
Keyword [en]
Volcanic gas, Emission, SO(2), Wind speed, DOAS, Etna, MM5
National Category
Climate Research
Research subject
Climate
Identifiers
URN: urn:nbn:se:smhi:diva-606DOI: 10.1007/s00445-008-0260-8ISI: 000269529500003OAI: oai:DiVA.org:smhi-606DiVA: diva2:807988
Available from: 2015-04-27 Created: 2015-04-21 Last updated: 2016-04-12Bibliographically approved

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