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Author (up) Courtois, E. A.; Stahl, C.; Burban, B.; Van Den Berge, J.; Berveiller, D.; Bréchet, L.; Larned Soong, J.; Arriga, N.; Peñuelas, J.; August Janssens, I. pdf  url
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  Title Automatic high-frequency measurements of full soil greenhouse gas fluxes in a tropical forest Type Journal Article
  Year 2019 Publication Biogeosciences Abbreviated Journal Biogeosciences  
  Volume 16 Issue 3 Pages 785-796  
  Abstract Measuring in situ soil fluxes of carbon dioxide (CO 2 ), methane (CH 4 ), and nitrous oxide (N 2 O) continuously at high frequency requires appropriate technology. We tested the combination of a commercial automated soil CO 2 flux chamber system (LI-8100A) with a CH 4 and N 2 O analyzer (Picarro G2308) in a tropical rainforest for 4 months. A chamber closure time of 2 min was sufficient for a reliable estimation of CO 2 and CH 4 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 N 2 O 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 N 2 O fluxes (85.6% of measured fluxes are above MDF±0.002 nmolm -2 s -1 ). Our study highlights the importance of adjusted closure time for each gas. © Author(s) 2019.  
  Address CREAF, Cerdanyola Del Vallès, Catalonia, 08193, Spain  
  Corporate Author Thesis  
  Publisher Copernicus GmbH Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 17264170 (Issn) ISBN Medium  
  Area Expedition Conference  
  Notes Export Date: 25 February 2019; Correspondence Address: Alice Courtois, E.; Department of Biology University of Antwerp, Centers of Excellence Global Change Ecology and PLECO (Plants and Ecosystems), Universiteitsplein 1, Belgium; email:; Funding details: Centre de Coopération Internationale en Recherche Agronomique pour le Développement, CIRAD; Funding details: European Research Council, ERC, ERC-2013-SyG 610028-IMBALANCE-P; Funding details: ANR-10-LABX-25-01, ANR-11-INBS-0001; Funding details: U.S. Department of Energy, DOE, DE-AC02-05CH11231; Funding details: Agence Nationale de la Recherche, ANR; Funding details: Institut National de la Recherche Agronomique, INRA; Funding details: Fonds Wetenschappelijk Onderzoek, FWO; Funding text 1: Acknowledgements. This research was supported by the European Research Council Synergy grant ERC-2013-SyG 610028-IMBALANCE-P. We thank Jan Segers for help in the initial setting of the system and Renato Winkler from Picarro and Rod Madsen and Jason Hupp from LI-COR for their help in combining the systems. We thank the staff of Paracou station, managed by UMR Ecofog (CIRAD, INRA; Kourou), which received support from “Investissement d’Avenir” grants managed by Agence Nationale de la Recherche (CEBA: ANR-10-LABX-25-01, ANAEE-France: ANR-11-INBS-0001). This study was conducted in collaboration with the Guyaflux program belonging to SOERE F-ORE-T, which is supported annually by Ecofor, Allenvi, and the French national research infrastructure, ANAEE-F. This program also received support from an “investissement d’avenir” grant from the Agence Nationale de la Recherche (CEBA, ref ANR-10-LABX-25-01). Ivan August Janssens acknowledges support from Antwerp University (Methusalem funding), Nicola Arriga from ICOS-Belgium and Fonds Wetenschappelijk Onderzoek (FWO), and Jennifer Larned Soong from the U.S. Department of Energy under contract DE-AC02-05CH11231.; References: Aguilos, M., Hérault, B., Burban, B., Wagner, F., Bonal, D., What drives long-Term variations in carbon flux and balance in a tropical rainforest in French Guiana? (2018) Agr. Forest Meteorol, 253, pp. 114-123; Ambus, P., Skiba, U., Drewer, J., Jones, S., Carter, M.S., Albert, K.R., Sutton, M., Development of an accumulation-based system for cost-effective chamber measurements of inert trace gas fluxes (2010) Eur. J. Soil Sci, 61, pp. 785-792; Arias-Navarro, C., Díaz-Pinés, E., Klatt, S., Brandt, P., Rufino, M.C., Butterbach-Bahl, K., Verchot, L., Spatial variability of soil N2O and CO2 fluxes in different topographic positions in a tropical montane forest in Kenya (2017) J. Geophys. 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