Biogeosciences
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Articles | Volume 23, issue 9
Articles | Volume 23, issue 9
https://doi.org/10.5194/bg-23-3225-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-3225-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 9
Research article
 | 
11 May 2026
Research article |  | 11 May 2026

Relative uptake of carbonyl sulphide to carbon dioxide: insights from a coupled boundary layer – canopy inverse modelling framework

Peter J. M. Bosman, Maarten C. Krol, Laurens N. Ganzeveld, Felix M. Spielmann, and Georg Wohlfahrt

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Short summary
Carbonyl sulphide (COS) is a trace gas that can be used to estimate plant CO2 uptake. For this, the ratio of deposition velocities of COS and CO2 (leaf relative uptake - LRU) is relevant. We use a soil – canopy – atmospheric mixed layer model to simulate COS and CO2 plant uptake in needleleaf ecosystems, and derive LRU. We find significant in-canopy variability of LRU, and develop a regression model for canopy-scale LRU. The results can contribute to improving COS-based ecosystem plant CO2 uptake estimates in needleleaf forests.
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