Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 25, issue 23
Articles | Volume 25, issue 23
https://doi.org/10.5194/acp-25-17553-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-17553-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 25, issue 23
Research article
 | 
04 Dec 2025
Research article |  | 04 Dec 2025

Evaluation of and updates to the oxidized reactive nitrogen gaseous dry-deposition parameterization from the GEOS-Chem model, including a pathway for ground surface NO2 hydrolysis

Brian L. Boys, Randall V. Martin, and Trevor C. VandenBoer

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Short summary
A widely used dry-deposition parameterization for NO2 has been updated to include a well-known heterogeneous hydrolysis reaction on deposition surfaces. This update addresses a large low bias of -80 % in simulated NO2 nocturnal deposition velocities evaluated against long-term eddy covariance flux observations over Harvard Forest. We highlight the importance of canopy surface area effects as well as soil NO emissions in formulating and evaluating NO2 dry-deposition parameterizations.
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