Automatic high-frequency measurements of full soil greenhouse gas fluxes in a tropical forest
Courtois, Elodie A. (University of Antwerp. Department of Biology)
Stahl, Clément (Université des Antilles. AgroParisTech)
Burban, Benoit (Université des Antilles. AgroParisTech)
Berge, Joke Van den (University of Antwerp. Department of Biology)
Berveiller, Daniel (Centre National de la Recherche Scientifique (França))
Bréchet, Laëtitia (University of Antwerp. Department of Biology)
Soong, Jennifer L. (Lawrence Berkeley National Laboratory. Climate and Ecosystem Sciences Division)
Arriga, Nicola (University of Antwerp. Department of Biology)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Janssens, Ivan (University of Antwerp. Department of Biology)

Date:	2019
Abstract:	Measuring in situ soil fluxes of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) continuously at high frequency requires appropriate technology. We tested the combination of a commercial automated soil CO2 flux chamber system (LI-8100A) with a CH4 and N2O analyzer (Picarro G2308) in a tropical rainforest for 4 months. A chamber closure time of 2 min was sufficient for a reliable estimation of CO2 and CH4 fluxes (100 % and 98. 5 % of fluxes were above minimum detectable flux - MDF, respectively). This closure time was generally not suitable for a reliable estimation of the low N2O fluxes in this ecosystem but was sufficient for detecting rare major peak events. A closure time of 25 min was more appropriate for reliable estimation of most N2O fluxes (85. 6 % of measured fluxes are above MDF ± 0. 002 nmol m−2 s−1). Our study highlights the importance of adjusted closure time for each gas.
Grants:	European Commission 610028
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Published in:	Biogeosciences, Vol. 16, Issue 3 (February 2019) , 785-796, ISSN 1726-4189

DOI: 10.5194/bg-16-785-2019

12 p, 3.1 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals) > Imbalance-P
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