SOIL
SOIL
SOIL
Articles | Volume 12, issue 1
Articles | Volume 12, issue 1
https://doi.org/10.5194/soil-12-561-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/soil-12-561-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 12, issue 1
Original research article
 | 
04 May 2026
Original research article |  | 04 May 2026

Destabilization of buried carbon under changing moisture regimes

Teneille Nel, Manisha Dolui, Abbygail R. McMurtry, Stephanie Chacon, Joseph A. Mason, Laura M. Phillips, Erika Marin-Spiotta, Marie-Anne de Graaff, Asmeret A. Berhe, and Teamrat A. Ghezzehei

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Short summary
Buried ancient topsoils (Brady paleosol, Nebraska) sequester vast amounts of soil organic carbon (SOC). We found repeated drying/rewetting causes greater carbon (C) loss than continuous wetting, destabilizing the slow-cycling C pool, especially in shallower soils. Decomposition rates are higher in erosional settings. Burial depth and moisture regime are key to the long-term vulnerability of these ancient C stocks under climate change.
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