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Climate-driven thresholds in reactive mineral retention of soil carbon at the global scale

Author

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  • Marc G. Kramer

    (Washington State University)

  • Oliver A. Chadwick

    (University of California)

Abstract

Soil organic matter can release carbon dioxide to the atmosphere as the climate warms. Organic matter sorbed to reactive (iron- and aluminium-bearing) soil minerals is an important mechanism for long-term carbon storage. However, the global distribution of mineral-stored carbon across climate zones and consequently its overall contribution to the global soil carbon pool is poorly known. We measured carbon held by reactive minerals across a broad range of climates. Carbon retained by reactive minerals was found to contribute between 3 and 72% of organic carbon found in mineral soil, depending on mean annual precipitation and potential evapotranspiration. Globally, we estimate ~600 Gt of soil carbon is retained by reactive minerals, with most occurring in wet forested biomes. For many biomes, the fraction of organic carbon retained by reactive minerals is responsive to slight shifts in effective moisture, suggesting high sensitivity to future changes in climate.

Suggested Citation

  • Marc G. Kramer & Oliver A. Chadwick, 2018. "Climate-driven thresholds in reactive mineral retention of soil carbon at the global scale," Nature Climate Change, Nature, vol. 8(12), pages 1104-1108, December.
    • Handle: RePEc:nat:natcli:v:8:y:2018:i:12:d:10.1038_s41558-018-0341-4
    DOI: 10.1038/s41558-018-0341-4
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    Cited by:

    1. Joan P. Casas-Ruiz & Pascal Bodmer & Kelly Ann Bona & David Butman & Mathilde Couturier & Erik J. S. Emilson & Kerri Finlay & Hélène Genet & Daniel Hayes & Jan Karlsson & David Paré & Changhui Peng & , 2023. "Integrating terrestrial and aquatic ecosystems to constrain estimates of land-atmosphere carbon exchange," Nature Communications, Nature, vol. 14(1), pages 1-17, December.
    2. Katerina Georgiou & Robert B. Jackson & Olga Vindušková & Rose Z. Abramoff & Anders Ahlström & Wenting Feng & Jennifer W. Harden & Adam F. A. Pellegrini & H. Wayne Polley & Jennifer L. Soong & William, 2022. "Global stocks and capacity of mineral-associated soil organic carbon," Nature Communications, Nature, vol. 13(1), pages 1-12, December.
    3. Zhang, Zhenyu & Li, Xiaoyu & Liu, Lijuan & Wang, Yugang & Li, Yan, 2020. "Influence of mulched drip irrigation on landscape scale evapotranspiration from farmland in an arid area," Agricultural Water Management, Elsevier, vol. 230(C).
    4. Iain P. Hartley & Tim C. Hill & Sarah E. Chadburn & Gustaf Hugelius, 2021. "Temperature effects on carbon storage are controlled by soil stabilisation capacities," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
    5. Yunpeng Zhao & Chengzhu Liu & Xingqi Li & Lixiao Ma & Guoqing Zhai & Xiaojuan Feng, 2023. "Sphagnum increases soil’s sequestration capacity of mineral-associated organic carbon via activating metal oxides," Nature Communications, Nature, vol. 14(1), pages 1-11, December.

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