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Article Dans Une Revue Scientific Reports Année : 2017

Atmospheric deposition, CO2, and change in the land carbon sink

1 Global Ecology Unit, CREAF-CSIC-UAB
2 CREAF - Centre de Recerca Ecològica i Aplicacions Forestals
3 Excellence PLECO (Plant and Vegetation Ecology), Department of Biology
4 LSCE - Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette]
5 ICOS-ATC - ICOS-ATC
6 IIASA - International Institute for Applied Systems Analysis
7 Global Carbon Project
8 SATINV - Modélisation INVerse pour les mesures atmosphériques et SATellitaires
9 Sino-French Institute of Earth System Science, College of Urban and Environmental Sciences
10 LMD - Laboratoire de Météorologie Dynamique (UMR 8539)
11 Institut für Hydrologie und Meteorologie [Dresden]
12 Department of Evolution, Ecology, and Organismal Biology
13 Foxlab Joint CNR-FEM Initiative
14 FEM - Fondazione Edmund Mach - Edmund Mach Foundation [Italie]
15 Department of Biosystem Engineering (BioSE), Gembloux Agro-Bio Tech
16 Department of Environmental Engineering
17 Bioclimatology, Faculty of Forest Sciences and Forest Ecology
18 FMI - Finnish Meteorological Institute
19 Department of Forest Ecosystems & Society
20 CEFE - Centre d’Ecologie Fonctionnelle et Evolutive
21 UM - Université de Montpellier
22 EEF - Ecologie et Ecophysiologie Forestières [devient SILVA en 2018]
23 UMR ISPA - Interactions Sol Plante Atmosphère
24 Department of Physics [Helsinki]
25 CNR - National Research Council of Italy
26 CNR - National Research Council of Italy | Consiglio Nazionale delle Ricerche
27 LTRR - Laboratory of Tree-Ring Research [University of Arizona]
28 Forest Services
29 Faculty of Science and Technology
30 Alterra Wageningen
31 VU - Vrije Universiteit Amsterdam [Amsterdam]
32 SEAS - Harvard John A. Paulson School of Engineering and Applied Sciences
33 DIBAF
34 Institute of Tibetan Plateau Research
Denis Loustau
D. Papale
  • Fonction : Auteur

Résumé

Concentrations of atmospheric carbon dioxide (CO2) have continued to increase whereas atmospheric deposition of sulphur and nitrogen has declined in Europe and the USA during recent decades. Using time series of flux observations from 23 forests distributed throughout Europe and the USA, and generalised mixed models, we found that forest-level net ecosystem production and gross primary production have increased by 1% annually from 1995 to 2011. Statistical models indicated that increasing atmospheric CO2 was the most important factor driving the increasing strength of carbon sinks in these forests. We also found that the reduction of sulphur deposition in Europe and the USA lead to higher recovery in ecosystem respiration than in gross primary production, thus limiting the increase of carbon sequestration. By contrast, trends in climate and nitrogen deposition did not significantly contribute to changing carbon fluxes during the studied period. Our findings support the hypothesis of a general CO2-fertilization effect on vegetation growth and suggest that, so far unknown, sulphur deposition plays a significant role in the carbon balance of forests in industrialized regions. Our results show the need to include the effects of changing atmospheric composition, beyond CO2, to assess future dynamics of carbon-climate feedbacks not currently considered in earth system/climate modelling.
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hal-01607165 , version 1 (26-05-2020)

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M. Fernández-Martínez, S. Vicca, I. A. Janssens, P. Ciais, M. Obersteiner, et al.. Atmospheric deposition, CO2, and change in the land carbon sink. Scientific Reports, 2017, 7 (1), pp.1-13. ⟨10.1038/s41598-017-08755-8⟩. ⟨hal-01607165⟩
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