Articles | Volume 12, issue 1
https://doi.org/10.5194/esurf-12-271-2024
https://doi.org/10.5194/esurf-12-271-2024
Research article
 | 
31 Jan 2024
Research article |  | 31 Jan 2024

Probing the exchange of CO2 and O2 in the shallow critical zone during weathering of marl and black shale

Tobias Roylands, Robert G. Hilton, Erin L. McClymont, Mark H. Garnett, Guillaume Soulet, Sébastien Klotz, Mathis Degler, Felipe Napoleoni, and Caroline Le Bouteiller

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Short summary
Chemical weathering of sedimentary rocks can release carbon dioxide and consume oxygen. We present a new field-based method to measure the exchange of these gases in real time, which allows us to directly compare the amount of reactants and products. By studying two sites with different rock types, we show that the chemical composition is an important factor in driving the weathering reactions. Locally, the carbon dioxide release changes alongside temperature and precipitation.