The tropopause region in a changing atmosphere (TPChange) (ACP/AMT/GMD/WCD inter-journal SI)(ACP/AMT/GMD/WCD inter-journal SI)
The tropopause region in a changing atmosphere (TPChange) (ACP/AMT/GMD/WCD inter-journal SI)(ACP/AMT/GMD/WCD inter-journal SI)
Editor(s): ACP editors | Coordinators: Peter Haynes (University of Cambridge, United Kingdom) and Simone Tilmes (NSF National Center for Atmospheric Research, United States) | Co-organizers: Peter Hoor (Johannes Gutenberg University Mainz, Germany) and Aurélien Podglajen (Laboratoire de Météorologie Dynamique, France) Special issue jointly organized between Atmospheric Chemistry and Physics, Atmospheric Measurement Techniques, Geoscientific Model Development, and Weather and Climate Dynamics

This special issue includes the publications which are published under the remit of the collaborative research centre The tropopause region in a changing atmosphere (TPChange) that started in 2021. The consortium under the umbrella of this project constitutes experts from gas-phase and aerosol chemistry relevant to the transport and composition of the tropopause region. It covers new measurements and developments as well as process-oriented and global modelling of processes that concern this climate-relevant region. The purpose of TPChange is to develop deeper understanding of the role of tropopause processes (often sub-grid to global modelling) in the light of climate change.

Review process: This inter-journal special issue co-lists papers of different journals. Thereby, each paper was submitted to 1 particular journal and underwent the regular interactive peer-review process of that journal. Depending on the journal, the peer review was handled by regular members of the editorial board and/or by guest editors designated by the journal’s chief/executive editors.

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10 Jul 2025
Organic aerosols mixing across the tropopause and its implication for anthropogenic pollution of the UTLS
Anna Breuninger, Philipp Joppe, Jonas Wilsch, Cornelis Schwenk, Heiko Bozem, Nicolas Emig, Laurin Merkel, Rainer Rossberg, Timo Keber, Arthur Kutschka, Philipp Waleska, Stefan Hofmann, Sarah Richter, Florian Ungeheuer, Konstantin Dörholt, Thorsten Hoffmann, Annette Miltenberger, Johannes Schneider, Peter Hoor, and Alexander L. Vogel
EGUsphere, https://doi.org/10.5194/egusphere-2025-3129,https://doi.org/10.5194/egusphere-2025-3129, 2025
Preprint under review for ACP (discussion: open, 1 comment)
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08 Jul 2025
The TropoPause Composition TOwed Sensor Shuttle (TPC-TOSS): A new airborne dual platform approach for atmospheric composition measurements at the tropopause
Heiko Bozem, Philipp Joppe, Yun Li, Nicolas Emig, Armin Afchine, Anna Breuninger, Joachim Curtius, Stefan Hofmann, Sadath Ismayil, Konrad Kandler, Daniel Kunkel, Arthur Kutschka, Hans-Christoph Lachnitt, Andreas Petzold, Sarah Richter, Timo Röschenthaler, Christian Rolf, Lisa Schneider, Johannes Schneider, Alexander Vogel, and Peter Hoor
EGUsphere, https://doi.org/10.5194/egusphere-2025-3175,https://doi.org/10.5194/egusphere-2025-3175, 2025
Preprint under review for AMT (discussion: open, 1 comment)
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26 Jun 2025
Stratospheric Hydration and Ice Microphysics of a Convective Overshoot Observed during the TPEx Campaign over Sweden
Patrick Konjari, Christian Rolf, Martina Krämer, Armin Afchine, Nicole Spelten, Irene Bartolome Garcia, Annette Miltenberger, Nicolar Emig, Philipp Joppe, Johannes Schneider, Yun Li, Andreas Petzold, Heiko Bozem, and Peter Hoor
EGUsphere, https://doi.org/10.5194/egusphere-2025-2847,https://doi.org/10.5194/egusphere-2025-2847, 2025
Preprint under review for ACP (discussion: open, 1 comment)
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10 Jun 2025
The Frosty Frontier: Redefining the Tropopause as a transport barrier using the Relative Humidity over Ice
Philipp Reutter and Peter Spichtinger
EGUsphere, https://doi.org/10.5194/egusphere-2025-2474,https://doi.org/10.5194/egusphere-2025-2474, 2025
Preprint under review for ACP (discussion: final response, 2 comments)
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06 Jun 2025
Microphysical Parameter Choices Modulate Ice Content and Relative Humidity in the Outflow of a Warm Conveyor Belt
Cornelis Schwenk, Annette Miltenberger, and Annika Oertel
EGUsphere, https://doi.org/10.5194/egusphere-2025-1816,https://doi.org/10.5194/egusphere-2025-1816, 2025
Preprint under review for ACP (discussion: final response, 4 comments)
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24 Apr 2025
The extratropical tropopause – Trace gas perspective on tropopause definition choice
Sophie Bauchinger, Andreas Engel, Markus Jesswein, Timo Keber, Harald Bönisch, Florian Obersteiner, Andreas Zahn, Nicolas Emig, Peter Hoor, Hans-Christoph Lachnitt, Franziska Weyland, Linda Ort, and Tanja J. Schuck
EGUsphere, https://doi.org/10.5194/egusphere-2025-1589,https://doi.org/10.5194/egusphere-2025-1589, 2025
Revised manuscript under review for ACP (discussion: final response, 4 comments)
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28 Feb 2025
Contribution of gravity waves to shear in the extratropical lowermost stratosphere: insights from idealized baroclinic life cycle experiments
Madhuri Umbarkar and Daniel Kunkel
EGUsphere, https://doi.org/10.5194/egusphere-2025-351,https://doi.org/10.5194/egusphere-2025-351, 2025
Revised manuscript accepted for ACP (discussion: final response, 4 comments)
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28 Jan 2025
Impact of cirrus on extratropical tropopause structure
Nicolas Emig, Annette K. Miltenberger, Peter M. Hoor, and Andreas Petzold
EGUsphere, https://doi.org/10.5194/egusphere-2024-3919,https://doi.org/10.5194/egusphere-2024-3919, 2025
Revised manuscript accepted for ACP (discussion: final response, 5 comments)
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20 Jan 2025
Development and use of a lightweight sampling system for height-selective drone-based measurements of organic aerosol particles
Christine Borchers, Lasse Moormann, Bastien Geil, Niklas Karbach, and Thorsten Hoffmann
EGUsphere, https://doi.org/10.5194/egusphere-2024-4015,https://doi.org/10.5194/egusphere-2024-4015, 2025
Preprint under review for AMT (discussion: final response, 6 comments)
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20 Dec 2024
Retention During Freezing of Raindrops, Part II: Investigation of Ambient Organics from Beijing Urban Aerosol Samples
Jackson Seymore, Martanda Gautam, Miklós Szakáll, Alexander Theis, Thorsten Hoffmann, Jialiang Ma, Lingli Zhou, and Alexander Vogel
EGUsphere, https://doi.org/10.5194/egusphere-2024-3940,https://doi.org/10.5194/egusphere-2024-3940, 2024
Revised manuscript accepted for ACP (discussion: final response, 4 comments)
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19 Sep 2024
Analyzing the chemical composition, morphology and size of ice-nucleating particles by coupling a scanning electron microscope to an offline diffusion chamber
Lisa Schneider, Jann Schrod, Daniel Weber, Heinz Bingemer, Konrad Kandler, Joachim Curtius, and Martin Ebert
EGUsphere, https://doi.org/10.5194/egusphere-2024-2797,https://doi.org/10.5194/egusphere-2024-2797, 2024
Revised manuscript accepted for AMT (discussion: final response, 6 comments)
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01 Jul 2025
CO2 variability and seasonal cycle in the UTLS: Insights from EMAC model and AirCore observational data
Johannes Degen, Bianca C. Baier, Patrick Jöckel, J. Moritz Menken, Tanja J. Schuck, Colm Sweeney, and Andreas Engel
EGUsphere, https://doi.org/10.5194/egusphere-2025-2648,https://doi.org/10.5194/egusphere-2025-2648, 2025
Preprint under review for ACP (discussion: open, 0 comments)
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28 Jan 2025
Ice formation processes key in determining WCB outflow cirrus properties
Tim Lüttmer, Annette Miltenberger, and Peter Spichtinger
EGUsphere, https://doi.org/10.5194/egusphere-2025-185,https://doi.org/10.5194/egusphere-2025-185, 2025
Revised manuscript accepted for ACP (discussion: final response, 4 comments)
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03 Dec 2024
A new parameterisation for homogeneous ice nucleation driven by highly variable dynamical forcings
Alena Kosareva, Stamen Dolaptchiev, Peter Spichtinger, and Ulrich Achatz
Geosci. Model Dev. Discuss., https://doi.org/10.5194/gmd-2024-193,https://doi.org/10.5194/gmd-2024-193, 2024
Revised manuscript accepted for GMD (discussion: closed, 3 comments)
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