Articles | Volume 25, issue 13
https://doi.org/10.5194/acp-25-7369-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-7369-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
14 Jul 2025
Research article |
| 14 Jul 2025
| 14 Jul 2025
Soil deposition of atmospheric hydrogen constrained using planetary-scale observations
Alexander K. Tardito Chaudhri
CORRESPONDING AUTHOR
School of GeoSciences, The University of Edinburgh, King's Buildings, Alexander Crum Brown Rd, Edinburgh, EH9 3FF, UK
David S. Stevenson
School of GeoSciences, The University of Edinburgh, King's Buildings, Alexander Crum Brown Rd, Edinburgh, EH9 3FF, UK
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Yao Ge, Massimo Vieno, David S. Stevenson, Peter Wind, and Mathew R. Heal
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This study reports the first evaluation of the global EMEP MSC-W ACTM driven by WRF meteorology, with a focus on surface concentrations and wet deposition of reactive N and S species. The model–measurement comparison is conducted both spatially and temporally, covering 10 monitoring networks worldwide. The statistics from the comprehensive evaluations presented in this study support the application of this model framework for global analysis of the budgets and fluxes of reactive N and SIA.
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Short summary
There remains a large uncertainty in the global warming potential of atmospheric hydrogen due to poor constraints on its soil deposition and, therefore, its lifetime. A new analysis of the latitudinal variation in the observed seasonality of hydrogen is used to constrain its surface fluxes. This is complemented with a simple latitude–height model where surface fluxes are adjusted from a prototype deposition scheme.
There remains a large uncertainty in the global warming potential of atmospheric hydrogen due to...
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