Articles | Volume 23, issue 19
https://doi.org/10.5194/bg-23-6803-2026
https://doi.org/10.5194/bg-23-6803-2026
Research article
 | 
02 Oct 2026
Research article |  | 02 Oct 2026

Quantifying aggregation bias in marsh carbon flux estimates caused by rhizosphere oxygen heterogeneity

Youssef Saadaoui, Christian Beer, Peter Mueller, Friederike Neiske, Joscha N. Becker, Annette Eschenbach, and Philipp Porada

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Cited articles

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Beer, C.: Simulation of heterotrophic respiration of incubated soil samples based on the Introductory Carbon Balance Model (ICBM), Version 1, Universität Hamburg [data set], https://doi.org/10.25592/uhhfdm.14367, 2024. 
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Short summary
In marsh soils, oxygen concentrations are high close to plant roots and decline to near zero within millimetres. Microorganisms do not decompose organic matter in proportion to oxygen. Many models nevertheless use a single average oxygen concentration. Using Elbe River soils, we compared this approach with a calculation over the full range. The single average overestimated carbon dioxide release by about 12 %. Marsh soils may therefore store more carbon than models predict.
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