Atmospheric deposition, CO2, and change in the land carbon sink - Archive ouverte HAL
Article Dans Une Revue Scientific Reports Année : 2017

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

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