Measuring volcanic degassing of SO2 in the lower troposphere with ASTER band ratios

R Campion, G G Salerno, P F Coheur, D Hurtmans, L Clarisse, K Kazahaya, M Burton, T Caltabiano, C Clerbaux, A Bernard

    Research output: Contribution to journalArticlepeer-review

    Abstract

    We present a new method for measuring SO2 with the data from the ASTER (Advanced Spaceborne Thermal Emission and Reflectance radiometer) orbital sensor. The method consists of adjusting the SO2 column amount until the ratios of radiance simulated on several ASTER bands match the observations. We present a sensitivity analysis for this method, and two case studies. The sensitivity analysis shows that the selected band ratios depend much less on atmospheric humidity, sulfate aerosols, surface altitude and emissivity than the raw radiances. Measurements with
    Original languageEnglish
    Pages (from-to)42-54
    Number of pages13
    JournalJournal of Volcanology and Geothermal Research
    Volume194
    Issue number1-3
    DOIs
    Publication statusPublished - 2010

    Keywords

    • remote sensing
    • so2
    • aster
    • doas
    • etna
    • miyakejima
    • sulfur-dioxide flux
    • ultraviolet spectrometer
    • miyakejima volcano
    • mount-etna
    • emissions
    • plumes
    • japan
    • rates
    • tir

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