The influence of ammonia emission inventories on size-resolved global atmospheric aerosol  composition and acidity

Wang, Xurong; Tsimpidi, Alexandra P.; Luo, Zhenqi; Steil, Benedikt; Pozzer, Andrea; Lelieveld, Jos; Karydis, Vlassis A.

doi:https://doi.org/10.5194/acp-25-10559-2025

Articles | Volume 25, issue 18

https://doi.org/10.5194/acp-25-10559-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

The Modular Earth Submodel System (MESSy) (ACP/GMD inter-journal...

https://doi.org/10.5194/acp-25-10559-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 25, issue 18

Research article

|

16 Sep 2025

Research article |

| 16 Sep 2025

The influence of ammonia emission inventories on size-resolved global atmospheric aerosol composition and acidity

Xurong Wang, Alexandra P. Tsimpidi, Zhenqi Luo, Benedikt Steil, Andrea Pozzer, Jos Lelieveld, and Vlassis A. Karydis

Supplement

https://doi.org/10.5194/acp-25-10559-2025-supplement

Model code and software

he Modular Earth Submodel System, Version~2.55.2\_842-isorropia-light The MESSy Consortium https://doi.org/10.5281/zenodo.8379120

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Short summary

Ammonia (NH₃) is an abundant alkaline gas and key precursor in particulate matter formation. While SO₂ and NO_x emissions have decreased, global NH₃ emissions are stable or rising. This study investigates NH₃ emission impacts on size-resolved aerosol composition and acidity using the EMAC (ECHAM5/MESSy Atmospheric Chemistry) model, analyzing three emission schemes. Sulfate–nitrate–ammonium aerosols in fine-mode sizes are most sensitive to NH₃ changes. Regional responses vary. NH₃ buffers aerosol acidity, mitigating pH shifts.