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    Volcanic SO2 fluxes derived from satellite data: A survey using OMI, GOME-2, IASI and MODIS

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    Authors
    Theys, N.
    Campion, R.
    Clarisse, L.
    Brenot, H.
    Van Gent, J.
    Dils, B.
    Corradini, S.
    Merucci, L.
    Coheur, P.-F.
    Van Roozendael, M.
    Hurtmans, D.
    Clerbaux, C.
    Tait, S.
    Ferrucci, F.
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    Discipline
    Earth and related Environmental sciences
    Subject
    adsorption
    atmospheric chemistry
    GOME
    IASI
    MODIS
    satellite data
    sulfur dioxide
    volcano
    Audience
    Scientific
    Date
    2013
    Metadata
    Show full item record
    Description
    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.
    Citation
    Theys, N.; Campion, R.; Clarisse, L.; Brenot, H.; Van Gent, J.; Dils, B.; Corradini, S.; Merucci, L.; Coheur, P.-F.; Van Roozendael, M.; Hurtmans, D.; Clerbaux, C.; Tait, S.; Ferrucci, F. (2013). Volcanic SO2 fluxes derived from satellite data: A survey using OMI, GOME-2, IASI and MODIS. , Atmospheric Chemistry and Physics, Vol. 13, Issue 12, 5945-5968, DOI: 10.5194/acp-13-5945-2013.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/2894
    doi: http://dx.doi.org/10.5194/acp-13-5945-2013
    scopus: 2-s2.0-84879938002
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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