| Title: | "Surface flux and vertical profile of dimethyl sulfide in acid sulfate soils at Cudgen Lake, northern New South Wales, Australia" |
| Author(s): | Swan HB; Deschaseaux ESM; Eyre BD; Jones GB; |
| Address: | "Southern Cross University, School of Environment, Science and Engineering, Lismore, New South Wales, Australia; Centre for Coastal Biogeochemistry, Southern Cross University, Lismore, New South Wales, Australia. Electronic address: h.swan.11@scu.edu.au. Southern Cross University, School of Environment, Science and Engineering, Lismore, New South Wales, Australia; Centre for Coastal Biogeochemistry, Southern Cross University, Lismore, New South Wales, Australia" |
| DOI: | 10.1016/j.chemosphere.2019.04.129 |
| ISSN/ISBN: | 1879-1298 (Electronic) 0045-6535 (Linking) |
| Abstract: | "A dimethyl sulfide (DMS) vertical concentration profile and DMS surface emission flux were quantified in undisturbed acid sulfate soils (ASS) at Cudgen Lake on the north coast of New South Wales, Australia. A deuterated internal standard was used to account for soil adsorption characteristics. The DMS vertical concentration profile increased exponentially from 0.6?ª+m depth to the surface layer. This profile reflected the adsorption properties of the ASS horizons present and the experimentally determined octanol/water partition coefficient for DMS of 1.36, suggesting that DMS would be mobilised in the soil water medium for upward translocation in time due to surface evaporation. The organic material in the oxidised ASS crustal layer had a chemically strong adsorption affinity for DMS, which appeared to restrain its emission from surface soil particles to the atmosphere. The seasonally averaged DMS surface flux estimate from the Cudgen Lake ASS was 9?ª+ng?ª+S m(-2) min(-1), which is relatively low by comparison to DMS fluxes reported from other wetland soils such as salt-marshes and acidic peat bogs. The worldwide annual average DMS emission from ASS was estimated to be 1.14?ª+x?ª+10(-3)?ª+Tg?ª+S, which is globally insignificant by comparison to DMS emission from the world's oceans" |
| Keywords: | Australia Lakes New South Wales Soil/*chemistry Sulfides/*chemistry Acid sulfate soils Cudgen lake Dimethyl sulfide Surface flux Vertical profile Volatile organic sulfur compounds; |
| Notes: | "MedlineSwan, Hilton B Deschaseaux, Elisabeth S M Eyre, Bradley D Jones, Graham B eng England 2019/04/30 Chemosphere. 2019 Aug; 228:309-317. doi: 10.1016/j.chemosphere.2019.04.129. Epub 2019 Apr 22" |
