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Carbon-nitrogen interactions in European forests and semi-natural vegetation - Part 1: Fluxes and budgets of carbon, nitrogen and greenhouse gases from ecosystem monitoring and modelling

Chris Flechard 1, * Andreas Ibrom 2 Ute Skiba 3 Wim de Vries 4 Marcel van Oijen 3 David Cameron 5 Nancy Dise 6 Janne Korhonen 7 Nina Buchmann 8 Arnaud Legout 9 David Simpson 10 Maria Sanz Marc Aubinet 11 Denis Loustau 12 Leonardo Montagnani 13 Johan Neirynck 14 Ivan Janssens 15 Mari Pihlatie Ralf Kiese 16 Jan Siemens 17 Andre-Jean Francez 18 Jürgen Augustin Andrej Varlagin Janusz Olejnik 19 Radosław Juszczak Mika Aurela 20 Daniel Berveiller 21 Bogdan Chojnicki 22 Ulrich Dämmgen 23 Nicolas Delpierre 21 Vesna Djuricic Julia Drewer 24 Eric Dufrene 25, 26 Werner Eugster 27 Yannick Fauvel 1 David Fowler 28 Arnoud Frumau 29 André Granier 30 Patrick Gross 30 Yannick Hamon 31 Carole Helfter 32 Arjan Hensen László Horváth Barbara Kitzler Bart Kruijt 33 Werner Kutsch 34 Raquel Lobo-Do-Vale 35 Annalea Lohila 36 Bernard Longdoz 30 Michal Marek 37 Giorgio Matteucci 38 Marta Mitosinkova 39 Virginie Moreaux 30 Albrecht Neftel 40 Jean-Marc Ourcival 41 Kim Pilegaard 42 Gabriel Pita 43 Francisco Sanz Jan Schjoerring 44 Maria-Teresa Sebastia 45 Y. Sim Tang Hilde Uggerud Marek Urbaniak 46 Netty van Dijk Timo Vesala 47 Sonja Vidic Caroline Vincke 48 Tamás Weidinger Sophie Zechmeister-Boltenstern 49 Klaus Butterbach-Bahl 16 Eiko Nemitz 50 Mark Sutton 24
* Corresponding author
36 Atmospheric Composition Research [Helsinki]
FMI - Finnish Meteorological Institute
42 Biosystems Division [Roskilde]
Risø DTU - Risø National Laboratory for Sustainable Energy
Abstract : The impact of atmospheric reactive nitrogen (Nr) deposition on carbon (C) sequestration in soils and biomass of unfertilized, natural, semi-natural and forest ecosystems has been much debated. Many previous results of this dC∕dN response were based on changes in carbon stocks from periodical soil and ecosystem inventories, associated with estimates of Nr deposition obtained from large-scale chemical transport models. This study and a companion paper (Flechard et al., 2020) strive to reduce uncertainties of N effects on C sequestration by linking multi-annual gross and net ecosystem productivity estimates from 40 eddy covariance flux towers across Europe to local measurement-based estimates of dry and wet Nr deposition from a dedicated collocated monitoring network. To identify possible ecological drivers and processes affecting the interplay between C and Nr inputs and losses, these data were also combined with in situ flux measurements of NO, N2O and CH4 fluxes; soil NO−3 leaching sampling; and results of soil incubation experiments for N and greenhouse gas (GHG) emissions, as well as surveys of available data from online databases and from the literature, together with forest ecosystem (BASFOR) modelling.
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Submitted on : Wednesday, July 15, 2020 - 3:54:30 PM
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Chris Flechard, Andreas Ibrom, Ute Skiba, Wim de Vries, Marcel van Oijen, et al.. Carbon-nitrogen interactions in European forests and semi-natural vegetation - Part 1: Fluxes and budgets of carbon, nitrogen and greenhouse gases from ecosystem monitoring and modelling. Biogeosciences, European Geosciences Union, 2020, 17 (6), pp.1583-1620. ⟨10.5194/bg-17-1583-2020⟩. ⟨hal-02541780⟩



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