Articles | Volume 21, issue 19
https://doi.org/10.5194/acp-21-14983-2021
© Author(s) 2021. 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-21-14983-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
ACP Letters
| Highlight paper
| 
15 Oct 2021
ACP Letters | Highlight paper |
| 15 Oct 2021
| 15 Oct 2021
How alkaline compounds control atmospheric aerosol particle acidity
Vlassis A. Karydis
CORRESPONDING AUTHOR
Atmospheric Chemistry Dept., Max Planck Institute for Chemistry,
Mainz 55128, Germany
Inst. for Energy and Climate Research, IEK-8, Forschungszentrum Jülich, Jülich 52425, Germany
Alexandra P. Tsimpidi
Atmospheric Chemistry Dept., Max Planck Institute for Chemistry,
Mainz 55128, Germany
Inst. for Energy and Climate Research, IEK-8, Forschungszentrum Jülich, Jülich 52425, Germany
Inst. for Environmental Research and Sustainable Development, National Observatory of Athens, Athens, 15236, Greece
Andrea Pozzer
Atmospheric Chemistry Dept., Max Planck Institute for Chemistry,
Mainz 55128, Germany
International Centre for Theoretical Physics, Trieste, 34151, Italy
Jos Lelieveld
Atmospheric Chemistry Dept., Max Planck Institute for Chemistry,
Mainz 55128, Germany
The Cyprus Institute, Climate and Atmosphere Research Center,
Nicosia, 1645, Cyprus
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Latest update: 08 Jul 2025
Short summary
Aerosol particle pH is well-buffered by alkaline compounds, notably NH3 and crustal elements. NH3 is found to supply remarkable buffering capacity on a global scale, from the polluted continents to the remote oceans. Potential future changes in agricultural NH3 must be accompanied by strong reductions of SO2 and NOx to avoid particles becoming highly acidic, with implications for human health (aerosol toxicity), ecosystems (acid deposition), clouds, and climate (aerosol hygroscopicity).
Aerosol particle pH is well-buffered by alkaline compounds, notably NH3 and crustal elements....
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