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Les Sols pour la Sécurité Alimentaire et le Climat

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« The global potential for increased storage of carbon on land » – 2022 – Walker & al

Wayne S. Walker, Seth R. Gorelik, Susan C. Cook-Patton, and Bronson W. Griscom in PNAS – May 31, 2022

Despite increased interest in land-based carbon storage as a climate solution, there are physical limits on how much additional carbon can be incorporated into terrestrial ecosystems. To effectively determine where and how to act, jurisdictions need robust data illustrating the magnitude and distribution of opportunities to increase carbon storage, as well as information on the actions available to achieve that storage. Here, we provide globally consistent maps for directing additional carbon storage under current and future climate, as well as a framework for determining how that storage could be gained through restoration, improved management, or maintenance of woody biomass and soil organic matter. Our estimates provide an upper bound on how improved land stewardship can mitigate the climate crisis.