Weakening of global terrestrial carbon sequestration capacity under increasing intensity of warm extremes

Yuan, Xiuliang, Chen, Xi, Uchenna Ochege, Friday, Hamdi, Rafiq, Tabari, Hossein, Li, Baofu, He, Bin, Zhang, Chi, De Maeyer, Philippe and Luo, Geping, (2024). Weakening of global terrestrial carbon sequestration capacity under increasing intensity of warm extremes. Nature Ecology & Evolution, 11 n/a-n/a

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  • Sub-type Journal article
    Author Yuan, Xiuliang
    Chen, Xi
    Uchenna Ochege, Friday
    Hamdi, Rafiq
    Tabari, Hossein
    Li, Baofu
    He, Bin
    Zhang, Chi
    De Maeyer, Philippe
    Luo, Geping
    Title Weakening of global terrestrial carbon sequestration capacity under increasing intensity of warm extremes
    Appearing in Nature Ecology & Evolution
    Volume 11
    Publication Date 2024-11-08
    Place of Publication Berlin and Heidelberg
    Publisher Springer Nature
    Start page n/a
    End page n/a
    Language eng
    Abstract The net ecosystem exchange (NEE), determining terrestrial carbon sequestration capacity, is strongly controlled by climate change and has exhibited substantial year-to-year fluctuations. How the increased frequency and intensity of warm extremes affect NEE variations remains unclear. Here, we combined multiple NEE datasets from atmospheric CO2 inversions, Earth system models, eddy-covariance data-driven methods and climate datasets to show that the terrestrial carbon sequestration capacity is weakened during warm extreme occurrences over the past 40 years, primarily contributed by tropical regions (81% ± 48%). The underlying mechanism can be rooted in the overwhelmingly decreased trend of gross primary productivity compared with terrestrial ecosystem respiration. Additionally, the weakened terrestrial carbon sequestration capacity is mainly driven by the transition from temperature or soil moisture control to vapour pressure deficit control, which is associated with the increasing intensity of warm extremes. Our findings suggest that warm extremes threaten the global carbon sequestration function of terrestrial ecosystems. Therefore, more attention should be given to the evolution of the increasing intensity of warm extremes in future climate projections.
    Copyright Holder authors
    Copyright Year 2024
    Copyright type All rights reserved
    DOI https://doi.org/10.1038/s41559-024-02576-5
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    Created: Sat, 09 Nov 2024, 22:57:36 JST by Haideh Beigi on behalf of UNU INWEH