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Article Dans Une Revue Communications Earth & Environment Année : 2023

Joint optimization of land carbon uptake and albedo can help achieve moderate instantaneous and long-term cooling effects

Alexander Graf
Georg Wohlfahrt
Sergio Aranda-Barranco
Nicola Arriga
Christian Brümmer
Ankur R Desai
Sara Di Lonardo
Mana Gharun
Thomas Grünwald
Lukas Hörtnagl
Kuno Kasak
Anne Klosterhalfen
Alexander Knohl
Natalia Kowalska
Michael Leuchner
Anders Lindroth
Matthias Mauder
  • Fonction : Auteur
Mirco Migliavacca
Alexandra C Morel
  • Fonction : Auteur
Andreas Pfennig
Hendrik Poorter
  • Fonction : Auteur
Christian Poppe Terán
Oliver Reitz
  • Fonction : Auteur
Corinna Rebmann
Arturo Sanchez-Azofeifa
  • Fonction : Auteur
Marius Schmidt
Ladislav Šigut
Enrico Tomelleri
Ke Yu
Andrej Varlagin
  • Fonction : Auteur
Harry Vereecken

Résumé

Both carbon dioxide uptake and albedo of the land surface affect global climate. However, climate change mitigation by increasing carbon uptake can cause a warming trade-off by decreasing albedo, with most research focusing on afforestation and its interaction with snow. Here, we present carbon uptake and albedo observations from 176 globally distributed flux stations. We demonstrate a gradual decline in maximum achievable annual albedo as carbon uptake increases, even within subgroups of non-forest and snow-free ecosystems. Based on a paired-site permutation approach, we quantify the likely impact of land use on carbon uptake and albedo. Shifting to the maximum attainable carbon uptake at each site would likely cause moderate net global warming for the first approximately 20 years, followed by a strong cooling effect. A balanced policy co-optimizing carbon uptake and albedo is possible that avoids warming on any timescale, but results in a weaker long-term cooling effect.
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Dates et versions

hal-04196764 , version 1 (05-09-2023)

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Alexander Graf, Georg Wohlfahrt, Sergio Aranda-Barranco, Nicola Arriga, Christian Brümmer, et al.. Joint optimization of land carbon uptake and albedo can help achieve moderate instantaneous and long-term cooling effects. Communications Earth & Environment, 2023, 4 (1), pp.298. ⟨10.1038/s43247-023-00958-4⟩. ⟨hal-04196764⟩
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