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| Titel |
Volcanic SO2 fluxes derived from satellite data: a survey using OMI, GOME-2, IASI and MODIS |
| VerfasserIn |
N. Theys, R. Campion, L. Clarisse, H. Brenot, J. Gent, B. Dils, S. Corradini, L. Merucci, P.-F. Coheur, M. Roozendael, D. Hurtmans, C. Clerbaux, S. Tait, F. Ferrucci |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 13, no. 12 ; Nr. 13, no. 12 (2013-06-20), S.5945-5968 |
| Datensatznummer |
250018713
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| Publikation (Nr.) |
 copernicus.org/acp-13-5945-2013.pdf |
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| Zusammenfassung |
Sulphur dioxide (SO2) fluxes of active degassing volcanoes are
routinely measured with ground-based equipment to characterize and monitor
volcanic activity. SO2 of unmonitored volcanoes or from explosive
volcanic eruptions, can be measured with satellites. However, remote-sensing
methods based on absorption spectroscopy generally provide integrated
amounts of already dispersed plumes of SO2 and satellite derived flux
estimates are rarely reported.
Here we review a number of different techniques to derive volcanic SO2
fluxes using satellite measurements of plumes of SO2 and investigate
the temporal evolution of the total emissions of SO2 for three very
different volcanic events in 2011: Puyehue-Cordón Caulle (Chile),
Nyamulagira (DR Congo) and Nabro (Eritrea). High spectral resolution
satellite instruments operating both in the ultraviolet-visible (OMI/Aura
and GOME-2/MetOp-A) and thermal infrared (IASI/MetOp-A) spectral ranges, and
multispectral satellite instruments operating in the thermal infrared
(MODIS/Terra-Aqua) are used. We show that satellite data can provide fluxes
with a sampling of a day or less (few hours in the best case). Generally the
flux results from the different methods are consistent, and we discuss the
advantages and weaknesses of each technique. Although the primary objective
of this study is the calculation of SO2 fluxes, it also enables us to
assess the consistency of the SO2 products from the different sensors
used. |
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