Articles | Volume 26, issue 10
https://doi.org/10.5194/acp-26-6825-2026
© Author(s) 2026. 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-26-6825-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
20 May 2026
Research article |
| 20 May 2026
| 20 May 2026
Airborne remote sensing of nitrous acid in the troposphere: potential sources of excess HONO
Benjamin Weyland
CORRESPONDING AUTHOR
Institute of Environmental Physics, Heidelberg University, Heidelberg, Germany
Simon Rosanka
Institute of Climate and Energy Systems – Troposphere (ICE-3), Forschungszentrum Jülich, Jülich, Germany.
Domenico Taraborrelli
Institute of Climate and Energy Systems – Troposphere (ICE-3), Forschungszentrum Jülich, Jülich, Germany.
Birger Bohn
Institute of Climate and Energy Systems – Troposphere (ICE-3), Forschungszentrum Jülich, Jülich, Germany.
Andreas Zahn
Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research, Karlsruhe, Germany
Florian Obersteiner
Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research, Karlsruhe, Germany
Eric Förster
Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research, Karlsruhe, Germany
now at: DLR, Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany
Mariano Mertens
Deutsches Zentrum für Luft- und Raumfahrt, Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany
Faculty of Aerospace Engineering, Section Operations and Environment, Delft University of Technology, Delft, the Netherlands
Patrick Jöckel
Deutsches Zentrum für Luft- und Raumfahrt, Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany
Helmut Ziereis
Deutsches Zentrum für Luft- und Raumfahrt, Institut für Physik der Atmosphäre, Oberpfaffenhofen, Germany
Katharina Kaiser
Institute for Physics of the Atmosphere, Johannes Gutenberg University, Mainz, Germany
Max Planck Institute for Chemistry, Department of Aerosol Chemistry, Mainz, Germany
Horst Fischer
Max Planck Institute for Chemistry, Department of Atmospheric Chemistry, Mainz, Germany
John N. Crowley
Max Planck Institute for Chemistry, Department of Atmospheric Chemistry, Mainz, Germany
Nijing Wang
Max Planck Institute for Chemistry, Department of Atmospheric Chemistry, Mainz, Germany
Achim Edtbauer
Max Planck Institute for Chemistry, Department of Atmospheric Chemistry, Mainz, Germany
Jonathan Williams
Max Planck Institute for Chemistry, Department of Atmospheric Chemistry, Mainz, Germany
Maria Dolores Andrés Hernández
Institute of Environmental Physics, University of Bremen, Bremen, Germany
John P. Burrows
Institute of Environmental Physics, University of Bremen, Bremen, Germany
Flora Kluge
Institute of Environmental Physics, Heidelberg University, Heidelberg, Germany
now at: ECMWF, Bonn, Germany
Meike K. Rotermund
Institute of Environmental Physics, Heidelberg University, Heidelberg, Germany
now at: Department of Physics, University of Toronto, Toronto, Canada
Andre Butz
Institute of Environmental Physics, Heidelberg University, Heidelberg, Germany
Heidelberg Center for the Environment, Heidelberg University, Heidelberg, Germany
Interdisciplinary Center for Scientific Computing, Heidelberg University, Heidelberg, Germany
Klaus Pfeilsticker
Institute of Environmental Physics, Heidelberg University, Heidelberg, Germany
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Total article views: 5,659 (including HTML, PDF, and XML)
Cumulative views and downloads
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Short summary
The destruction by sunlight of nitrous acid (HONO) produces the so-called detergent of the atmosphere. HONO has been measured in concentrations which exceed predictions based on known chemistry for decades. Several reactions have been proposed which may explain this excess HONO. This study reports on airborne measurements of HONO; the observations exceed predictions and form a C-shaped profile in the troposphere. Together with a host of other measurements, various reactions are investigated.
The destruction by sunlight of nitrous acid (HONO) produces the so-called detergent of the...
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