Articles | Volume 16, issue 21
https://doi.org/10.5194/acp-16-13417-2016
https://doi.org/10.5194/acp-16-13417-2016
Research article
 | 
31 Oct 2016
Research article |  | 31 Oct 2016

Non-stomatal exchange in ammonia dry deposition models: comparison of two state-of-the-art approaches

Frederik Schrader, Christian Brümmer, Chris R. Flechard, Roy J. Wichink Kruit, Margreet C. van Zanten, Undine Zöll, Arjan Hensen, and Jan Willem Erisman

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Short summary
We found a systematic mismatch of modeled and measured NH3 fluxes using two state-of-the-art dry deposition models and data from five sites in Europe. Results of our analysis indicate a too large minimum non-stomatal resistance and too strong temperature response in the parameterization of a unidirectional surface–atmosphere exchange scheme, as well as room for improvement on the emission potential parameterization of a bidirectional model, both directly impacting predicted NH3 exchange fluxes.
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