Global trends in carbon sinks and their relationships with CO₂ and temperature
Fernández-Martínez, Marcos (Universiteit Antwerpen. Departement Biologie)
Sardans i Galobart, Jordi (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Chevallier, Frédéric (Laboratoire des Sciences du Climat et de L'Environnement)
Ciais, Philippe (Laboratoire des Sciences du Climat et de l'Environnement)
Obersteiner, Michael (International Institute for Applied Systems Analysis (Àustria))
Janssens, Ivan (University of Antwerp. Departement Biologie)
Vicca, Sara (Universiteit Antwerpen. Departement Biologie)
Canadell, Josep G. (Global Carbon Project)
Bastos, Ana (Laboratoire des Sciences du Climat et de l'Environnement)
Friedlingstein, Pierre (University of Exeter. College of Engineering, Mathematics and Physical Sciences)
Sitch, Stephen (University of Exeter. College of Engineering, Mathematics and Physical Sciences)
Piao, Shilong (Sino-French Institute for Earth System Science)
Peñuelas, Josep (Centre de Recerca Ecològica i d'Aplicacions Forestals)

Date:	2019
Abstract:	Elevated CO₂ concentrations increase photosynthesis and, potentially, net ecosystem production (NEP), meaning a greater CO₂ uptake. Climate, nutrients and ecosystem structure, however, influence the effect of increasing CO₂. Here we analysed global NEP from MACC-II and Jena CarboScope atmospheric inversions and ten dynamic global vegetation models (TRENDY), using statistical models to attribute the trends in NEP to its potential drivers: CO2, climatic variables and land-use change. We found that an increased CO2 was consistently associated with an increased NEP (1995-2014). Conversely, increased temperatures were negatively associated with NEP. Using the two atmospheric inversions and TRENDY, the estimated global sensitivities for CO₂ were 6. 0 ± 0. 1, 8. 1 ± 0. 3 and 3. 1 ± 0. 1 PgC per 100 ppm (~1 °C increase), and −0. 5 ± 0. 2, −0. 9 ± 0. 4 and −1. 1 ± 0. 1 PgC °C⁻¹ for temperature. These results indicate a positive CO₂ effect on terrestrial C sinks that is constrained by climate warming.
Grants:	European Commission 610028 Ministerio de Economía y Competitividad CGL2016-79835-P Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1005
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Published in:	Nature climate change, Vol. 9 (Jan. 2019) , p. 73-79, ISSN 1758-6798

DOI: 10.1038/s41558-018-0367-7

Postprint. Article 26 p, 1.4 MB

Postprint. Material suplementari 25 p, 1.0 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals) > Imbalance-P
Articles > Research articles
Articles > Published articles