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

14803 10 79024 4 218318 document 79024 s41598-017-08755-8.pdf application/pdf 4ddb4145b0f36c6bbb8e58ca95a1634f MD5 3305096 2017-09-05 08:20:05 https://pure.iiasa.ac.at/id/eprint/14803/1/s41598-017-08755-8.pdf 14803 1 1 application/pdf text en public cc_by

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http://eprints.org/relation/isVersionOf https://pure.iiasa.ac.at/id/document/79024 http://eprints.org/relation/isVolatileVersionOf https://pure.iiasa.ac.at/id/document/79024 http://eprints.org/relation/issmallThumbnailVersionOf https://pure.iiasa.ac.at/id/document/79024 archive 5 disk0/00/01/48/03 2017-09-05 08:20:54 2021-08-27 17:29:19 2017-09-05 08:20:54 article show Fernández-Martínez M. Vicca S. Janssens I.A. Ciais P. Obersteiner M. 7255 0000-0001-6981-2769 Bartrons M. Sardans J. Verger A. Canadell J.G. Chevallier F. Wang X. Bernhofer C. Curtis P.S. Gianelle D. Grünwald T. Heinesch B. Ibrom A. Knohl A. Laurila T. Law B.E. Limousin J.M. Longdoz B. Loustau D. Mammarella I. Matteucci G. Monson R.K. Montagnani L. Moors E.J. Munger J.W. Papale D. Piao S.L. Peñuelas J. Atmospheric deposition, CO2, and change in the land carbon sink pub prog_esm 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. 2017-08 published Nature Publishing Group 10.1038/s41598-017-08755-8 219 public Scientific Reports 7 1 9632 TRUE 2045-2322 Effects of phosphorus limitations on Life, Earth system and Society (IMBALANCE-P, FP7 610028) FALSE yes info:eu-repo/grantAgreement/EC/FP7/610028/EU/Effects of phosphorus limitations on Life, Earth system and Society/IMBALANCE-P info:eu-repo/semantics/article info:eu-repo/semantics/openAccess