Biogeosciences
Biogeosciences
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Articles | Volume 23, issue 1
Articles | Volume 23, issue 1
https://doi.org/10.5194/bg-23-155-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-155-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 1
Research article
 | 
08 Jan 2026
Research article |  | 08 Jan 2026

Subsoils, but not toeslopes, store millennia-old PyC in a gently sloping catchment under temperate climate after centuries of cultivation

Johanne Lebrun Thauront, Philippa Ascough, Sebastian Doetterl, Negar Haghipour, Pierre Barré, Christian Walter, and Samuel Abiven

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Short summary
Fire-derived carbon is a form of organic carbon that has a long persistence in soils. However, its persistence at the landscape scale may be underestimated due to lateral and vertical redistribution. We measured fire-derived carbon in soils of a hilly agricultural watershed to identify the result of transport processes on the centennial time-scale. We show that the subsoil stores a large amount of fire-derived carbon and that erosion can redistribute it to localized accumulation zones.
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