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

Publication: Research - peer-reviewJournal article – Annual report year: 2010

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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
Publication date2010
Volume61
Journal number5
Pages785-792
ISSN1351-0754
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 5

Keywords

  • Bio systems, Environment and climate
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