Natural sulfur dioxide emissions from sulfuric soils

Bennett C.T. Macdonald*, O. Tom Denmead, Ian White, Michael D. Melville

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    31 Citations (Scopus)


    Soils have long been recognised as sulfur dioxide (SO2) sinks, but we show that they can also be sources of atmospheric SO2. Using static chambers and micrometeorological techniques, we have measured emissions of SO2 from coastal lowland soils containing sulfides (mostly pyrite), commonly referred to as acid sulfate soils in Australia. SO 2 evolution seems coupled to evaporation of soil water containing sulfite. The global emissions of S from acid sulfate soils is estimated at about 3Tg/year, which is of the same order as emissions from terrestrial biogenic sources and biomass burning and is about 3% of known anthropogenic emissions of S. Crown

    Original languageEnglish
    Pages (from-to)1473-1480
    Number of pages8
    JournalAtmospheric Environment
    Issue number10
    Publication statusPublished - Mar 2004


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