FTIR in the paddock

trace gas soil flux measurements using FTIR spectroscopy

D. W. T. Griffith, I. M. Jamie, P. A. Beasley, O. T. Denmead, R. Leuning, I. E. Galbally, C. P. Meyer

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

Abstract

We have used FTIR spectroscopy for high precision trace gas analysis combined with micrometeorological flux-gradient and chamber methods to measure the fluxes of trace gases CO2, CH4, N2O and CO between agricultural soils and the atmosphere. In flux gradient measurements, vertical profiles of the trace gases were measured every 30 minutes from the ground to 22 m. When combined with independent micrometeorological measurements of heat, water vapour and radiative fluxes, trace gas fluxes from the underlying surface could be determined. In chamber measurements, a closed chamber was placed over the soil surface and the air in the chamber monitored continuously by FTIR spectroscopy. Fluxes were calculated from the time rate of change of concentrations in the chamber after closure. The FTIR measurements were fully automated and ran reliably for several weeks, routinely obtaining precision of 0.1-0.5%.

Original languageEnglish
Title of host publicationFourier Transform Spectroscopy
Subtitle of host publicationEleventh International Conference
EditorsJames A. De Haseth
Place of PublicationMelville
PublisherAmerican Institute of Physics
Pages211-214
Number of pages4
ISBN (Print)1563967464, 9781563967467
DOIs
Publication statusPublished - 1998
Externally publishedYes
Event11th International Conference on Fourier Transform Spectroscopy (ICOFTS 11) - ATHENS, Gabon
Duration: 10 Aug 199715 Aug 1997

Publication series

NameAIP Conference Proceedings
PublisherAmerican Institute of Physics
Volume430
ISSN (Print)0094-243X

Conference

Conference11th International Conference on Fourier Transform Spectroscopy (ICOFTS 11)
CountryGabon
CityATHENS
Period10/08/9715/08/97

Cite this

Griffith, D. W. T., Jamie, I. M., Beasley, P. A., Denmead, O. T., Leuning, R., Galbally, I. E., & Meyer, C. P. (1998). FTIR in the paddock: trace gas soil flux measurements using FTIR spectroscopy. In J. A. De Haseth (Ed.), Fourier Transform Spectroscopy: Eleventh International Conference (pp. 211-214). (AIP Conference Proceedings; Vol. 430). Melville: American Institute of Physics. https://doi.org/10.1063/1.55805