Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
The tropopause region in a changing atmosphere (TPChange) (ACP/AMT/GMD/WCD inter-journal SI)(ACP/AMT/GMD/WCD inter-journal SI)
Special issues
Special issues
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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29 Aug 2025
Vertical distribution of halogenated trace gases in the summer Arctic stratosphere based on two independent air sampling methods
Johannes C. Laube, Tanja J. Schuck, Sophie Baartman, Huilin Chen, Markus Geldenhuys, Steven van Heuven, Timo Keber, Maria Elena Popa, Elinor Tuffnell, Florian Voet, Bärbel Vogel, Thomas Wagenhäuser, Alessandro Zanchetta, and Andreas Engel
Atmos. Meas. Tech., 18, 4087–4102, https://doi.org/10.5194/amt-18-4087-2025,https://doi.org/10.5194/amt-18-4087-2025, 2025
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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: final response, 2 comments)
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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: final response, 2 comments)
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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: final response, 3 comments)
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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
Revised manuscript accepted for ACP (discussion: final response, 8 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
Preprint 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
Revised manuscript accepted 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: final response, 2 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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02 Jun 2025
Adiabatic versus diabatic transport contributions to the ozone budget in the northern hemispheric upper troposphere and lower stratosphere
Frederik Harzer, Hella Garny, Felix Ploeger, J. Moritz Menken, and Thomas Birner
EGUsphere, https://doi.org/10.5194/egusphere-2025-2195,https://doi.org/10.5194/egusphere-2025-2195, 2025
Revised manuscript under review for ACP (discussion: final response, 3 comments)
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29 Apr 2025
Transport of Biomass Burning Aerosol into the Extratropical Tropopause Region over Europe via Warm Conveyor Belt Uplift
Philipp Joppe, Johannes Schneider, Jonas Wilsch, Heiko Bozem, Anna Breuninger, Joachim Curtius, Martin Ebert, Nicolas Emig, Peter Hoor, Sadath Ismayil, Konrad Kandler, Daniel Kunkel, Isabel Kurth, Hans-Christoph Lachnitt, Yun Li, Annette Miltenberger, Sarah Richter, Christian Rolf, Lisa Schneider, Cornelis Schwenk, Nicole Spelten, Alexander L. Vogel, Yafang Cheng, and Stephan Borrmann
EGUsphere, https://doi.org/10.5194/egusphere-2025-1346,https://doi.org/10.5194/egusphere-2025-1346, 2025
Preprint under review for ACP (discussion: final response, 4 comments)
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12 Mar 2025
Improving the accuracy in particle concentration measurements of a balloon-borne optical particle counter UCASS
Sina Jost, Ralf Weigel, Konrad Kandler, Luis Valero, Jessica Girdwood, Chris Stopford, Warren Stanley, Luca Katharina Eichhorn, Christian von Glahn, and Holger Tost
EGUsphere, https://doi.org/10.5194/egusphere-2025-451,https://doi.org/10.5194/egusphere-2025-451, 2025
Revised manuscript accepted for AMT (discussion: final response, 4 comments)
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19 Dec 2024
Retention During Freezing of Raindrops, Part I: Investigation of Single and Binary Mixtures
Martanda Gautam, Alexander Theis, Jackson Seymore, Moritz Hey, Stephan Borrmann, Karoline Diehl, Subir K. Mitra, and Miklós Szakáll
EGUsphere, https://doi.org/10.5194/egusphere-2024-3917,https://doi.org/10.5194/egusphere-2024-3917, 2024
Revised manuscript accepted for ACP (discussion: final response, 3 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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03 Jul 2024
The influence of extratropical cross-tropopause mixing on the correlation between ozone and sulfate aerosol in the lowermost stratosphere
Philipp Joppe, Johannes Schneider, Katharina Kaiser, Horst Fischer, Peter Hoor, Daniel Kunkel, Hans-Christoph Lachnitt, Andreas Marsing, Lenard Röder, Hans Schlager, Laura Tomsche, Christiane Voigt, Andreas Zahn, and Stephan Borrmann
Atmos. Chem. Phys., 24, 7499–7522, https://doi.org/10.5194/acp-24-7499-2024,https://doi.org/10.5194/acp-24-7499-2024, 2024
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18 Jul 2025
Fractal Characteristics of Ice-Supersaturated Regions in the Tropopause Region of the northern midlatitudes
Helena Zoe Schuh, Philipp Reutter, Stefan Niebler, and Peter Spichtinger
EGUsphere, https://doi.org/10.5194/egusphere-2025-2498,https://doi.org/10.5194/egusphere-2025-2498, 2025
Preprint under review for ACP (discussion: final response, 2 comments)
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03 Apr 2025
Gas-Ice Partitioning Coefficients of Carbonyls during Diffusional Ice Crystal Growth
Jackson Seymore, Miklós Szakáll, Alexander Theis, Subir K. Mitra, Christine Borchers, and Thorsten Hoffmann
EGUsphere, https://doi.org/10.5194/egusphere-2025-1425,https://doi.org/10.5194/egusphere-2025-1425, 2025
Revised manuscript under review for ACP (discussion: final response, 4 comments)
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21 Jan 2025
A dynamical separation of deep and shallow branches in the stratospheric circulation
Rasul Baikhadzhaev, Felix Ploeger, Peter Preusse, Manfred Ern, and Thomas Birner
EGUsphere, https://doi.org/10.5194/egusphere-2024-4088,https://doi.org/10.5194/egusphere-2024-4088, 2025
Revised manuscript accepted for ACP (discussion: final response, 7 comments)
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17 Mar 2025
Isentropic Mixing vs. Convection in CLaMS-3.0/MESSy: Evaluation Using Satellite Climatologies and In Situ Carbon Monoxide Observations
Paul Konopka, Felix Ploeger, Francesco D'Amato, Teresa Campos, Marc von Hobe, Shawn B. Honomichl, Peter Hoor, Laura L. Pan, Michelle L. Santee, Silvia Viciani, Kaley A. Walker, and Michaela I. Hegglin
EGUsphere, https://doi.org/10.5194/egusphere-2025-1155,https://doi.org/10.5194/egusphere-2025-1155, 2025
Preprint under review for ACP (discussion: final response, 2 comments)
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29 Jan 2025
Transport into the polar stratosphere from the Asian monsoon region
Xiaolu Yan, Paul Konopka, Felix Ploeger, and Aurélien Podglajen
Atmos. Chem. Phys., 25, 1289–1305, https://doi.org/10.5194/acp-25-1289-2025,https://doi.org/10.5194/acp-25-1289-2025, 2025
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29 Jan 2025
Long-term changes in the thermodynamic structure of the lowermost stratosphere inferred from reanalysis data
Franziska Weyland, Peter Hoor, Daniel Kunkel, Thomas Birner, Felix Plöger, and Katharina Turhal
Atmos. Chem. Phys., 25, 1227–1252, https://doi.org/10.5194/acp-25-1227-2025,https://doi.org/10.5194/acp-25-1227-2025, 2025
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18 Dec 2024
The role of ascent timescales for warm conveyor belt (WCB) moisture transport into the upper troposphere and lower stratosphere (UTLS)
Cornelis Schwenk and Annette Miltenberger
Atmos. Chem. Phys., 24, 14073–14099, https://doi.org/10.5194/acp-24-14073-2024,https://doi.org/10.5194/acp-24-14073-2024, 2024
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08 Jan 2025
Influence of land cover change on atmospheric organic gases, aerosols, and radiative effects
Ryan Vella, Matthew Forrest, Andrea Pozzer, Alexandra P. Tsimpidi, Thomas Hickler, Jos Lelieveld, and Holger Tost
Atmos. Chem. Phys., 25, 243–262, https://doi.org/10.5194/acp-25-243-2025,https://doi.org/10.5194/acp-25-243-2025, 2025
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02 Jul 2025
New submodel for emissions from Explosive Volcanic ERuptions (EVER v1.1) within the Modular Earth Submodel System (MESSy, version 2.55.1)
Matthias Kohl, Christoph Brühl, Jennifer Schallock, Holger Tost, Patrick Jöckel, Adrian Jost, Steffen Beirle, Michael Höpfner, and Andrea Pozzer
Geosci. Model Dev., 18, 3985–4007, https://doi.org/10.5194/gmd-18-3985-2025,https://doi.org/10.5194/gmd-18-3985-2025, 2025
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17 Jan 2024
The interhemispheric gradient of SF6 in the upper troposphere
Tanja J. Schuck, Johannes Degen, Eric Hintsa, Peter Hoor, Markus Jesswein, Timo Keber, Daniel Kunkel, Fred Moore, Florian Obersteiner, Matt Rigby, Thomas Wagenhäuser, Luke M. Western, Andreas Zahn, and Andreas Engel
Atmos. Chem. Phys., 24, 689–705, https://doi.org/10.5194/acp-24-689-2024,https://doi.org/10.5194/acp-24-689-2024, 2024
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17 Apr 2025
Measurement report: Greenhouse gas profiles and age of air from the 2021 HEMERA-TWIN balloon launch
Tanja J. Schuck, Johannes Degen, Timo Keber, Katharina Meixner, Thomas Wagenhäuser, Mélanie Ghysels, Georges Durry, Nadir Amarouche, Alessandro Zanchetta, Steven van Heuven, Huilin Chen, Johannes C. Laube, Sophie L. Baartman, Carina van der Veen, Maria Elena Popa, and Andreas Engel
Atmos. Chem. Phys., 25, 4333–4348, https://doi.org/10.5194/acp-25-4333-2025,https://doi.org/10.5194/acp-25-4333-2025, 2025
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16 Oct 2023
| ACP Letters
| Highlight paper
The dehydration carousel of stratospheric water vapor in the Asian summer monsoon anticyclone
Paul Konopka, Christian Rolf, Marc von Hobe, Sergey M. Khaykin, Benjamin Clouser, Elisabeth Moyer, Fabrizio Ravegnani, Francesco D'Amato, Silvia Viciani, Nicole Spelten, Armin Afchine, Martina Krämer, Fred Stroh, and Felix Ploeger
Atmos. Chem. Phys., 23, 12935–12947, https://doi.org/10.5194/acp-23-12935-2023,https://doi.org/10.5194/acp-23-12935-2023, 2023
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26 Sep 2023
On the pattern of interannual polar vortex–ozone co-variability during northern hemispheric winter
Frederik Harzer, Hella Garny, Felix Ploeger, Harald Bönisch, Peter Hoor, and Thomas Birner
Atmos. Chem. Phys., 23, 10661–10675, https://doi.org/10.5194/acp-23-10661-2023,https://doi.org/10.5194/acp-23-10661-2023, 2023
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16 Feb 2024
| ACP Letters
| Highlight paper
Moist bias in the Pacific upper troposphere and lower stratosphere (UTLS) in climate models affects regional circulation patterns
Felix Ploeger, Thomas Birner, Edward Charlesworth, Paul Konopka, and Rolf Müller
Atmos. Chem. Phys., 24, 2033–2043, https://doi.org/10.5194/acp-24-2033-2024,https://doi.org/10.5194/acp-24-2033-2024, 2024
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29 Jul 2025
Tracing elevated abundance of CH2Cl2 in the subarctic upper troposphere to the Asian Summer Monsoon
Markus Jesswein, Valentin Lauther, Nicolas Emig, Peter Hoor, Timo Keber, Hans-Christoph Lachnitt, Linda Ort, Tanja Schuck, Johannes Strobel, Ronja Van Luijt, C. Michael Volk, Franziska Weyland, and Andreas Engel
Atmos. Chem. Phys., 25, 8107–8126, https://doi.org/10.5194/acp-25-8107-2025,https://doi.org/10.5194/acp-25-8107-2025, 2025
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25 Mar 2025
The Flying Laboratory FLab: development and application of a UAS to measure aerosol particles and trace gases in the lower troposphere
Lasse Moormann, Thomas Böttger, Philipp Schuhmann, Luis Valero, Friederike Fachinger, and Frank Drewnick
Atmos. Meas. Tech., 18, 1441–1459, https://doi.org/10.5194/amt-18-1441-2025,https://doi.org/10.5194/amt-18-1441-2025, 2025
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11 Dec 2024
Variability and trends in the potential vorticity (PV)-gradient dynamical tropopause
Katharina Turhal, Felix Plöger, Jan Clemens, Thomas Birner, Franziska Weyland, Paul Konopka, and Peter Hoor
Atmos. Chem. Phys., 24, 13653–13679, https://doi.org/10.5194/acp-24-13653-2024,https://doi.org/10.5194/acp-24-13653-2024, 2024
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18 Jun 2025
A view on recent ice-nucleating particle intercomparison studies: why the uncertainty of the activation temperature matters
Jann Schrod and Heinz G. Bingemer
Atmos. Meas. Tech., 18, 2591–2605, https://doi.org/10.5194/amt-18-2591-2025,https://doi.org/10.5194/amt-18-2591-2025, 2025
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05 Sep 2024
How well can brightness temperature differences of spaceborne imagers help to detect cloud phase? A sensitivity analysis regarding cloud phase and related cloud properties
Johanna Mayer, Bernhard Mayer, Luca Bugliaro, Ralf Meerkötter, and Christiane Voigt
Atmos. Meas. Tech., 17, 5161–5185, https://doi.org/10.5194/amt-17-5161-2024,https://doi.org/10.5194/amt-17-5161-2024, 2024
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08 Jul 2024
Bayesian cloud-top phase determination for Meteosat Second Generation
Johanna Mayer, Luca Bugliaro, Bernhard Mayer, Dennis Piontek, and Christiane Voigt
Atmos. Meas. Tech., 17, 4015–4039, https://doi.org/10.5194/amt-17-4015-2024,https://doi.org/10.5194/amt-17-4015-2024, 2024
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