caa a22 4500 60621870X CHVBK 20210128101114.0 cr unu---uuuuu 210128e20150501xx s 000 0 eng 10.1007/s11104-015-2381-0 doi (NATIONALLICENCE)springer-10.1007/s11104-015-2381-0 Modeling soil CO2 production and transport to investigate the intra-day variability of surface efflux and soil CO2 concentration measurements in a Scots Pine Forest (Pinus Sylvestris, L.) [Elektronische Daten] [Stéphanie Goffin, Christophe Wylock, Benoit Haut, Martin Maier, Bernard Longdoz, Marc Aubinet] Aimed: The main aim of this study is to improve the mechanistic understanding of soil CO2 efflux (Fs), especially its temporal variation at short-time scales, by investigating, through modeling, which underlying process among CO2 production and its transport up to the atmosphere is responsible for observed intra-day variation of Fs and soil CO2 concentration [CO2]. Methods: In this study, a measurement campaign of Fs and vertical soil [CO2] profiles was conducted in a Scots Pine Forest soil in Hartheim (Germany) and used to develop a model testing several hypotheses. A reference model taking into account a purely diffusive CO2 transport and a temperature-dependent CO2 production is compared to models with a more complex description of either CO2 production or CO2 transport. For transport, the introduction of advection and the dispersion is investigated. For the production, the emergent hypothesis of the phloem pressure concentration wave (PPCW) influence is tested. Results: We show that intra-day variation of Fs and [CO2] is better represented when the more complex CO2 production expression is taken into account compared to the more detailed description of CO2 transport. Conclusion: We conclude that focus should be placed on the potential factors affecting the CO2 production, rather than on the transport process description Springer International Publishing Switzerland, 2015 Soil CO2 efflux nationallicence Production nationallicence Transport nationallicence Process-based model nationallicence Intra-day variability nationallicence Goffin Stéphanie Unit of Biosystem Physics, Université de Liège-Gembloux Agro-Bio Tech, 5030, Gembloux, Belgium aut Wylock Christophe Transfers, Interfaces and Processes (TIPs), Université Libre de Bruxelles (ULB), 50 av. F.D. Roosevelt CP 165/67, 1050, Brussels, Belgium aut Haut Benoit Transfers, Interfaces and Processes (TIPs), Université Libre de Bruxelles (ULB), 50 av. F.D. Roosevelt CP 165/67, 1050, Brussels, Belgium aut Maier Martin University of Freiburg, 79085, Freiburg im Breisgau, Germany aut Longdoz Bernard INRA, UMR d'Ecologie et Ecophysiologie Forestières, UMR1137, 54280, Champenoux, France aut Aubinet Marc Unit of Biosystem Physics, Université de Liège-Gembloux Agro-Bio Tech, 5030, Gembloux, Belgium aut Plant and Soil Springer International Publishing 390/1-2(2015-05-01), 195-211 0032-079X 390:1-2<195 2015 390 11104 https://doi.org/10.1007/s11104-015-2381-0 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-015-2381-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Goffin Stéphanie Unit of Biosystem Physics, Université de Liège-Gembloux Agro-Bio Tech, 5030, Gembloux, Belgium aut NATIONALLICENCE 700 1- Wylock Christophe Transfers, Interfaces and Processes (TIPs), Université Libre de Bruxelles (ULB), 50 av. F.D. Roosevelt CP 165/67, 1050, Brussels, Belgium aut NATIONALLICENCE 700 1- Haut Benoit Transfers, Interfaces and Processes (TIPs), Université Libre de Bruxelles (ULB), 50 av. F.D. Roosevelt CP 165/67, 1050, Brussels, Belgium aut NATIONALLICENCE 700 1- Maier Martin University of Freiburg, 79085, Freiburg im Breisgau, Germany aut NATIONALLICENCE 700 1- Longdoz Bernard INRA, UMR d'Ecologie et Ecophysiologie Forestières, UMR1137, 54280, Champenoux, France aut NATIONALLICENCE 700 1- Aubinet Marc Unit of Biosystem Physics, Université de Liège-Gembloux Agro-Bio Tech, 5030, Gembloux, Belgium aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 390/1-2(2015-05-01), 195-211 0032-079X 390:1-2<195 2015 390 11104