Articles | Volume 26, issue 14
https://doi.org/10.5194/acp-26-10399-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/acp-26-10399-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
24 Jul 2026
Research article |
| 24 Jul 2026
| 24 Jul 2026
Enhancement of ammonium nitrate aerosol in the Northern Hemisphere lower stratosphere linked to Asian summer monsoon outflow
Fatih Ekinci
Institute for Atmospheric Physics, University of Mainz, Mainz, Germany
Particle Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
Institute for Applied Geosciences (Environmental Mineralogy), Technical University of Darmstadt, Darmstadt, Germany
now at: Aerosol Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
Oliver Eppers
Particle Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
now at: Aerosol Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
Oliver Appel
Institute for Atmospheric Physics, University of Mainz, Mainz, Germany
Particle Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
now at: Aerosol Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
Felix Ploeger
Institute of Climate and Energy Systems (ICE-4), Forschungszentrum Jülich, Jülich, Germany
Institute for Atmospheric and Environmental Research, University of Wuppertal, Wuppertal, Germany
Antonis Dragoneas
Climate Geochemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
Sergej Molleker
Instrument Development Group, Max Planck Institute for Chemistry, Mainz, Germany
Philipp Brauner
Particle Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
now at: Aerosol Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
Hans-Christoph Lachnitt
Institute for Atmospheric Physics, University of Mainz, Mainz, Germany
Franziska Weyland
Institute for Atmospheric Physics, University of Mainz, Mainz, Germany
Linda Ort
Atmospheric Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
Nicolas Emig
Institute for Atmospheric Physics, University of Mainz, Mainz, Germany
Hans-Christian Clemen
Particle Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
now at: Aerosol Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
Laura Tomsche
Institute for Atmospheric Physics, University of Mainz, Mainz, Germany
Institut für Physik der Atmosphäre, Deutsches Zentrum für Luft- und Raumfahrt (DLR), Oberpfaffenhofen, Germany
Martin Ebert
Institute for Applied Geosciences (Environmental Mineralogy), Technical University of Darmstadt, Darmstadt, Germany
Peter Hoor
Institute for Atmospheric Physics, University of Mainz, Mainz, Germany
Bärbel Vogel
Institute of Climate and Energy Systems (ICE-4), Forschungszentrum Jülich, Jülich, Germany
Yafang Cheng
Aerosol Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
Johannes Schneider
Particle Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
now at: Aerosol Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
Stephan Borrmann
Institute for Atmospheric Physics, University of Mainz, Mainz, Germany
Particle Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
Institute for Atmospheric Physics, University of Mainz, Mainz, Germany
Particle Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
now at: Aerosol Chemistry Department, Max Planck Institute for Chemistry, Mainz, Germany
Data sets
Consistent meteorological (ERA5) and chemi- cal (CLaMS) information across airborne measurements over the globe between 1997 and 2023 H.-C. Lachnitt https://doi.org/10.5281/zenodo.15076520
Short summary
This study shows that aerosol transported from the Asian summer monsoon region can substantially alter the background composition of the extratropical lower stratosphere. Aircraft-based measurements and model simulations reveal a strong increase of ammonium nitrate aerosol from summer to autumn 2023 caused by transport of young air masses from South and East Asia. These particles can persist for months and undergo chemical aging.
This study shows that aerosol transported from the Asian summer monsoon region can substantially...
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