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Biogeosciences An interactive open-access journal of the European Geosciences Union
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Volume 14, issue 6
Biogeosciences, 14, 1365-1381, 2017
https://doi.org/10.5194/bg-14-1365-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Biogeosciences, 14, 1365-1381, 2017
https://doi.org/10.5194/bg-14-1365-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 20 Mar 2017

Research article | 20 Mar 2017

Gas chromatography vs. quantum cascade laser-based N2O flux measurements using a novel chamber design

Christian Brümmer et al.
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Alves, B. J. R., Smith, K. A., Flores, R. A., Cardoso, A. S., Oliveira, W. R. D., Jantalia, C. P., Urquiaga, S., and Boddey, R. M.: Selection of the most suitable sampling time for static chambers for the estimation of daily mean N2O flux from soils, Soil Biol. Biochem., 46, 129–135, 2012.
Ammann, C., Wolff, V., Marx, O., Brümmer, C., and Neftel, A.: Measuring the biosphere-atmosphere exchange of total reactive nitrogen by eddy covariance, Biogeosciences, 9, 4247–4261, https://doi.org/10.5194/bg-9-4247-2012, 2012.
Anthony, W. H., Hutchinson, G. L., and Livingston, G. P.: Chamber measurement of soil–atmosphere gas exchange: Linear vs. diffusion-based flux models, Soil Sci. Soc. Am. J., 59, 1308–1310, 1995.
Brümmer, C., Brüggemann, N., Butterbach-Bahl, K., Falk, U., Szarzynski, J., Vielhauer, K., Wassmann, R., and Papen, H.: Soil-atmosphere exchange of N2O and NO in near-natural savanna and agricultural land in Burkina Faso (W. Africa), Ecosystems, 11, 582–600, 2008.
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We present a novel chamber design for measuring soil–atmosphere N2O fluxes and compare the performance of a commonly applied gas chromatography (GC) setup with laser-based (QCL) concentration detection. While GC was still a useful method for longer-term investigations, we found that closure times of 10 min and sampling every 5 s is sufficient when using a QCL system. Further, extremely low standard errors (< 2 % of flux value) were observed regardless of linear or exponential flux calculation.
We present a novel chamber design for measuring soil–atmosphere N2O fluxes and compare the...
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