Article (Scientific journals)
Environmental control of land-atmosphere CO2 fluxes from temperate ecosystems: a statistical approach based on homogenized time series from five land-use types
Moreaux, V.; Longdoz, Bernard; Berveiller, D. et al.
2020In Tellus. Series B, Chemical and Physical Meteorology, 72 (1), p. 1-25
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Keywords :
Ecosystem respiration; Gross primary production; Net CO2 ecosystem exchange
Abstract :
[en] We assembled homogenized long-term time series, up to 19 years, of measurements of net ecosystem exchange of CO2 (NEE) and its partitioning between gross primary production (GPP) and respiration (Reco) for five different ecosystems representing the main plant functional types (PFTs) in France. Part of these data was analyzed to determine the influence of the main environmental variables on carbon fluxes between temperate ecosystems and the atmosphere, and to investigate the temporal patterns of their variations. A multi-temporal statistical analysis of the time series was conducted using random forest (RF) and wavelet coherence approaches. The RF analysis showed that, in all ecosystems, the incident solar radiation was highly correlated with GPP and that GPP was better correlated with the temporal variations of NEE than Reco. The air temperature was the second most important driver in ecosystems with seasonal foliage, i.e., deciduous forest, cropland and grassland; whereas variables related to air or soil drought were prominent in evergreen forest sites. The environmental control on CO2 fluxes was tighter at high frequency suggesting an increased resilience to environmental variations at longer time spans. The spectral analysis performed on three of the five sites selected revealed contrasting temporal patterns of the cross-coherence between CO2 fluxes and climate variables among ecosystems; these were related to the respective PFT, management and soil conditions. In all PFTs, the power spectrum of GPP was well correlated with NEE and clearly different from Reco. The spectral correlation analysis showed that the canopy phenology and disturbance regime condition the spectral correlation patterns of GPP and Reco with the soil moisture and atmospheric vapour deficit. © 2020, © 2020 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Moreaux, V.;  ISPA, Bordeaux Sciences Agro, INRAE, Villenave d’Ornon, France, Université Grenoble Alpes, CNRS, IGE UMR 5001, Grenoble, France
Longdoz, Bernard  ;  Université de Liège - ULiège > Département GxABT > Biosystems Dynamics and Exchanges
Berveiller, D.;  Écologie Systématique Évolution, Univ. Paris-Sud, CNRS, AgroParisTech, Université Paris-Saclay, Orsay, France
Delpierre, N.;  Écologie Systématique Évolution, Univ. Paris-Sud, CNRS, AgroParisTech, Université Paris-Saclay, Orsay, France
Dufrêne, E.;  Écologie Systématique Évolution, Univ. Paris-Sud, CNRS, AgroParisTech, Université Paris-Saclay, Orsay, France
Bonnefond, J.-M.;  ISPA, Bordeaux Sciences Agro, INRAE, Villenave d’Ornon, France
Chipeaux, C.;  ISPA, Bordeaux Sciences Agro, INRAE, Villenave d’Ornon, France
Joffre, R.;  CNRS, CEFE, UMR 5175, Montpellier, France
Limousin, J.-M.;  CNRS, CEFE, UMR 5175, Montpellier, France
Ourcival, J.-M.;  CNRS, CEFE, UMR 5175, Montpellier, France
Klumpp, K.;  INRAE, VetAgro Sup, UCA, UREP, UR874, Clermont-Ferrand, France
Darsonville, O.;  INRAE, VetAgro Sup, UCA, UREP, UR874, Clermont-Ferrand, France
Brut, A.;  CESBIO, Université de Toulouse, CNES/CNRS/INRAE/IRD/UPS, Toulouse, France
Tallec, T.;  CESBIO, Université de Toulouse, CNES/CNRS/INRAE/IRD/UPS, Toulouse, France
Ceschia, E.;  CESBIO, Université de Toulouse, CNES/CNRS/INRAE/IRD/UPS, Toulouse, France
Panthou, G.;  Université Grenoble Alpes, CNRS, IGE UMR 5001, Grenoble, France
Loustau, D.;  ISPA, Bordeaux Sciences Agro, INRAE, Villenave d’Ornon, France
More authors (7 more) Less
Language :
English
Title :
Environmental control of land-atmosphere CO2 fluxes from temperate ecosystems: a statistical approach based on homogenized time series from five land-use types
Publication date :
2020
Journal title :
Tellus. Series B, Chemical and Physical Meteorology
ISSN :
0280-6509
eISSN :
1600-0889
Publisher :
Taylor and Francis Ltd.
Volume :
72
Issue :
1
Pages :
1-25
Peer reviewed :
Peer Reviewed verified by ORBi
European Projects :
H2020 - 730944 - RINGO - Readiness of ICOS for Necessities of integrated Global Observations
Funders :
EU - European Union [BE]
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