Development of an accumulation-based system for cost-effective chamber measurements of inert trace gas fluxes

Per Ambus, U. Skiba, J. Drewer, S.K. Jones, Mette Sustmann Carter, Kristian Rost Albert, M.A. Sutton

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    As soil–atmosphere fluxes of greenhouse gases are characterized by high temporal fluctuations, frequent measurements in the range of hours to days need to be deployed, resulting in high analytical costs. We have therefore developed a new low-cost system that combines high-frequency automated sampling with low-frequency chemical analysis. The System for Inert Gas Monitoring by Accumulation (SIGMA) is suited particularly for stand-alone observations in remote locations. The SIGMA is connected to an automated chamber with headspace sampling several times per day. Air samples are aggregated in sampling bags, which reduces the number of subsequent laboratory analyses and allows calculation of average flux rates over extended sampling periods. The SIGMA was tested under field conditions and compared with a conventional autochamber system, where flux rates were measured several times per day. Sample air fillings of the SIGMA sampling bags varied less than 5% between bags and diverged
    Original languageEnglish
    JournalEuropean Journal of Soil Science
    Volume61
    Issue number5
    Pages (from-to)785-792
    ISSN1351-0754
    DOIs
    Publication statusPublished - 2010

    Keywords

    • Bio systems
    • Environment and climate

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