Heat and Drought Events Alter Biogenic Capacity to Balance CO2 Budget in South-Western Europe
Segura Barrero, Ricard (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Lauvaux, T. (University of Reims Champagne Ardenne)
Lian, Jinghui (Centre National de la Recherche Scientifique. Université Paris-Saclay)
Ciais, Philippe (Centre National de la Recherche Scientifique. Université Paris-Saclay)
Badia, Alba (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Ventura, Sergi (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Bazzi, H. (Université Paris-Saclay. AgroParisTech)
Abbessi, Ezzeddine (Centre National de la Recherche Scientifique. Université Paris-Saclay)
Fu, Zheng (Centre National de la Recherche Scientifique. Université Paris-Saclay)
Xiao, J. (University of New Hampshire. Institute for the Study of Earth, Oceans and Space)
Li, Xiaoyue (Sun Yat-sen University)
Villalba, Gara (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)

Date:	2025
Abstract:	Heat and drought events are increasing in frequency and intensity, posing significant risks to natural and agricultural ecosystems with uncertain effects on the net ecosystem CO2 exchange (NEE). The current Vegetation Photosynthesis and Respiration Model (VPRM) was adjusted to include soil moisture impacts on the gross ecosystem exchange (GEE) and respiration (RECO) fluxes to assess the temporal variability of NEE over south-western Europe for 2001-2022. Warming temperatures lengthen growing seasons, causing an increase in GEE, which is mostly compensated by a similar increment in RECO. As a result, there is a modest increase in the net carbon sink of 0. 69 gC m- 2 yr- 1 but with high spatial and annual variability. The heatwave of 2022 reduced net carbon uptake by 91. 7 TgC, a 26. 4% decrease from the mean. The interannual variability of NEE is more influenced by drought in temperate humid regions than in Mediterranean semi-arid regions. These results emphasize the vulnerability of the net carbon sink as drying trends could revert the NEE trends, as it is happening for croplands in the French Central Massif.
Grants:	European Commission 818002 Ministerio de Ciencia e Innovación CEX2019-000940-M Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00734
Note:	Altres ajuts: acords transformatius de la UAB
Note:	Unidad de excelencia María de Maeztu CEX2019-000940-M
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Published in:	Global biogeochemical cycles, Vol. 39, Issue 1 (January 2025) , art. e2024GB008163, ISSN 1944-9224

DOI: 10.1029/2024GB008163
PMID: 39759392

19 p, 4.9 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Institut de Ciència i Tecnologia Ambientals (ICTA) > Sustainability and Environmental Protection (Sostenipra)
Articles > Research articles
Articles > Published articles