Research Interests:

⦁ Transport and mixing processes in the upper troposphere/lower stratosphere (UTLS)
⦁ Composition and trends in the UTLS
⦁ Airborne observations using spectroscopic methods

The UTLS (upper troposphere/ lower stratosphere) region constitutes the interface of the turbulent and well mixed troposphere and the more stable stratified stratosphere. It is thus affected by frequent and eventually small scale dynamical, chemical and microphysical processes at the tropopause as well as the stratospheric circulation (Brewer-Dobson circulation). Its composition reflects these different processes and and time scales of transport. Importantly the composition feeds back on the thermodynamical structure introducing complex coupling effects on all scales. In combination these lead to large uncertainties when estimating future climate and surface temperatures, since their effects and interaction are partly unknown or quantified.

Airborne tracer measurements allow to identify transport pathways and source regions. They also allow to quantify air mass budgets for the UTLS or to deduce time scales for transport.

Scientific Activities & Service to the Community

⦁ Member of the scientific steering board of the research aircraft HALO
⦁ Spokesman of the DFG collaborative research center TR-301 “The tropopause region in a changing atmosphere”
⦁ Co-lead of the APARC activity OCTAV-UTLS (observation of composition and trends and variability in the UTLS
⦁ Mission Co-coordinator of the German HALO aircraft missions: WISE (2017), SouthTRAC (2019), PHILEAS (2023)
2010
Professor for Experimental Meteorology, Johannes Gutenberg-University, Mainz
2009 – 2010Project scientist, DFG-INSU/CNRS project POMODORO, Institute for Atmospheric Physics, Johannes Gutenberg-University, Mainz
2004 – 2009Project scientist, EU project “QUANTIFY”, the Max Planck Institute for Chemistry, Mainz
2003 – 2004Otto-Hahn research grant of the Max Planck-society, “Eidgenössisch Technische Hochschule” (ETH), Zürich
2000 – 2003PostDoc, BMBF project SPURT (AFO-2000), Max Planck Institute for Chemistry, Mainz
2000Otto-Hahn medal of the Max Planck-Society
2000PhD, Airborne trace gas measurements in the tropopause region, Max Planck Institute for Chemistry & Johannes Gutenberg-University, Mainz
1997Diploma, Physics, Johannes Gutenberg-University, Mainz
2025 Grant for Collaborative Research Center “The Tropopause in a Changing Atmosphere” (Second phase)
2024 Misson PI of the TPChange mission TPEx (“Tropopause composition and mixing experiment”)
2024 Organizer of the international conference “TP-Challenges”, Mainz, Germany
2023 Mission PI and Grant for HALO mission PHILEAS (“Probing High Latitude Export from the Asian Summer Monsoon”)
Since 2021 Spokesman of the collaborative research center (DFG-Sonderforschungsbereich) TR-301 „Die Tropopausenregion in einer Atmosphäre im Wandel“ („The Tropopause Region in a Changing Atmosphere“): TPChange
2021 Grant for Collaborative Research Center “The Tropopause in a Changing Atmosphere” (First phase)
2019 Mission PI and Grant for HALO mission SouthTRAC (“Southern Hemisphere Transport, Chemistry and Dynamics”)
2018 Organizer of the international conference “The UTLS: Current status and emerging challenges”, Mainz, Germany
2017 Mission PI and Grant for HALO mission WISE (“Wave driven Isentropic Exchange”)

Bozem, H., Joppe, P., Li, Y., Emig, N., Afchine, A., Breuninger, A., Curtius, J., Hofmann, S., Ismayil, S., Kandler, K., Kunkel, D., Kutschka, A., Lachnitt, H.-C., Petzold, A., Richter, S., Röschenthaler, T., Rolf, C., Schneider, L., Schneider, J., Vogel, A., and Hoor, P.: The TropoPause Composition TOwed Sensor Shuttle (TPC-TOSS): a new airborne dual platform approach for atmospheric composition measurements at the tropopause, Atmos. Meas. Tech., 18, 6545–6568, https://doi.org/10.5194/amt-18-6545-2025, 2025.
Millán, L., Hoor, P., Hegglin, M. I., Manney, G. L., Jeffery, P. S., Weyland, F. M., et al.: Ozone trends in the upper troposphere-lower stratosphere using equivalent latitude-potential temperature coordinates. Geophysical Research Letters , 52, e2025GL118651. https://doi.org/10.1029/2025GL118651, 2025.
Dörnbrack, A., Lachnitt, H.-C., Hoor, P., Imazio, P.R.: Multiscale dynamical processes shaping a mixing line. Journal of Geophysical Research: Atmospheres , 130, e2025JD043527. https://doi.org/10.1029/2025JD043527, 2025.
Weyland, F., Hoor, P., Kunkel, D., Birner, T., Plöger, F., and Turhal, K.: Long-term changes in the thermodynamic structure of the lowermost stratosphere inferred from reanalysis data, Atmos. Chem. Phys., 25, 1227–1252, https://doi.org/10.5194/acp-25-1227-2025, 2025.
Lachnitt, H.-C., Hoor, P., Kunkel, D., Bramberger, M., Dörnbrack, A., Müller, S., Reutter, P., Giez, A., Kaluza, T., and Rapp, M.: Gravity-wave-induced cross-isentropic mixing: a DEEPWAVE case study, Atmos. Chem. Phys., 23, 355–373,https://doi.org/10.5194/acp-23-355-2023, 2023.
Kaluza, T., Kunkel, D., and Hoor, P.: On the occurrence of strong vertical wind shear in the tropopause region: a 10-year ERA5 northern hemispheric study, Weather Clim. Dynam., 2, 631–651, https://doi.org/10.5194/wcd-2-631-2021, 2021.
Bozem, H., Hoor, P., Kunkel, D., Köllner, F., Schneider, J., Herber, A., Schulz, H., Leaitch, W. R., Aliabadi, A. A., Willis, M. D., Burkart, J., & Abbatt, J. P. D.: Characterization of transport regimes and the polar dome during Arctic spring and summer using in situ aircraft measurements. Atmospheric Chemistry and Physics ,19 (23), 15049–15071, https://doi.org/10.5194/acp-19-15049-2019, 2019.
Kunkel, D., Hoor, P., Kaluza, T., Ungermann, J., Kluschat, B., Giez, A., Lachnitt, H. C., Kaufmann, M., & Riese, M.: Evidence of small-scale quasi-isentropic mixing in ridges of extratropical baroclinic waves. Atmospheric Chemistry and Physics , 19 (19), 12607–12630. https://doi.org/10.5194/acp-19-12607-2019, 2019.
Müller, S., Hoor, P., Bozem, H., Gute, E., Vogel, B., Zahn, A., et al.: Impact of the Asian monsoon on the extra-tropical lower stratosphere: trace gas observations during TACTS over Europe 2012, Atmos. Chem. Phys., 16(16), 10573–10589, https://doi.org/10.5194/acp-16-10573-2016, 2016
Gettelman, A., P. Hoor, L. Pan, W. Randel, M. Hegglin, and T. Birner , The Extra Tropical Upper Troposphere and Lower Stratosphere, Rev. Geophys.,49, RG3003, doi:10.1029/2011RG000355, 2011.
Hoor, P., Borken-Kleefeld, J., Caro, D., Dessens, O., Endresen, O., Gauss, M., Grewe, V., Hauglustaine, D., Isaksen, I. S. A., Jöckel, P., Lelieveld, J., Meijer, E., Olivie, D., Prather, M., Schnadt Poberaj, C., Staehelin, J., Tang, Q., van Aardenne, J., van Velthoven, P., Sausen, R., The impact of traffic emissions on atmospheric ozone and OH: results from QUANTIFY, Atmos. Chem. Phys., 9, 3113-3136, 2009.
  • Dr. Heiko Bozem, Research associate
  • Dr. Daniel Kunkel, Research associate
  • Dr. Vera Bense, Coordination TPChange
  • Dr. Linda Smoydzin-Tost, Research associate
  • Aurelia Müller, Coordination TPChange
  • Dr. Hans-Christoph Lachnitt, Research associate
  • Dr. Amelie Mayer, Research associate
  • Franziska Weyland, PhD student
  • Nico Emig, PhD student
  • Linda Ort, PhD student (associated)
  • Simona Ripperger-Lukošiūnaitė , PhD student (associated)
  • Madhuri Umbarkar, PhD student
  • Simeon Kraus, PhD student
  • Jonas Blumenroth, Student associate
  • Isabel Kurth, Student associate
  • Alexander Stern, Student associate
  • Franziska Weiss, Student associate
  • Antonia van Ophysen, Student associate
  • Dr. Hans-Christoph Lachnitt (2022)
  • Dr. Thorsten Kaluza (2021)
  • Dr. Franziska Köllner (2020)
  • Dr. Stefan Müller (2015)
  • Dr. Christiane Hofmann (2014)
  • Dr. Florian Berkes (2014)
  • Jahanzaib Riaz (MSc, 2023)
  • Philipp Joppe (MSc, 2021)
  • Nicolas Emig (MSc, 2021)
  • Amelie Mayer (MSc, 2018)
  • Robert Gutmann (MSc, 2017)
  • Hans-Christoph Lachnitt (Diplom, 2016)
  • Björn Kluschat (Diplom, 2016)
  • Matthias Wandel (Diplom, 2015)
  • Jens Krause (Diplom, 2015)
  • Magdalena Bertelmann (Diplom, 2013)
  • Franziska Köllner (Diplom, 2013)
  • Janina Wendling (Diplom, 2012)
  • Sebastian Schlögl (Diplom, 2012)
  • Isabel Kurth (BSc, 2025, co-advised)
  • Jonas Blumenroth (BSc, 2025)
  • Gina Schulz (BSc, 2023)
  • Lisa-Katharina Herdt (BSc, 2023)
  • Lena Metzner (BSc, 2022)
  • Maximilian Büttner (BSc, 2020)
  • Franziska Weyland (BSc, 2020)
  • Philipp Joppe (BSc, 2019)
  • Vanessa Propach (BSc, 2017)
  • Robert Gutmann (BSc, 2015)
  • Philipp Franzen (BSc, 2013)
  • Britta Möllinger (BSc, 2012)
  1. Berufsfelderfahrung
    Instructor: Univ.-Prof. Dr. Peter Hoor
  2. Berufspraktikum
    Instructor: Univ.-Prof. Dr. Peter Hoor
  3. Einführung in die Meteorologie
    Instructor: Univ.-Prof. Dr. Peter Hoor; Dr. Daniel Kunkel
  4. Einführung in die Meteorologie (Zukunftszertifikat)
    Instructor: Univ.-Prof. Dr. Peter Hoor; Dr. Daniel Kunkel
  5. Methodenkenntnis
    Instructor: Dr. Heiko Bozem; Univ.-Prof. Dr. Peter Hoor; Dr. Daniel Kunkel; Dr. Franziska Köllner; Jun.-Prof. Dr. Annette Miltenberger; Dr. Philipp Reutter; Dr. Michael Riemer; Dr. Miklos Szakall; Univ.-Prof. Dr. Holger Tost; Prof. Dr. Thomas Wagner; Dr. Ralf Weigel; Univ.-Prof. Dr. Volkmar Wirth
  6. Projekt Umweltwissenschaften
    Instructor: Dr. Heiko Bozem; Univ.-Prof. Dr. Peter Hoor; Dr. Daniel Kunkel; Dr. Franziska Köllner; Jun.-Prof. Dr. Annette Miltenberger; Dr. Philipp Reutter; Dr. Michael Riemer; Univ.-Prof. Dr. Peter Spichtinger; Dr. Miklos Szakall; Univ.-Prof. Dr. Holger Tost; Dr. Ralf Weigel; Univ.-Prof. Dr. Volkmar Wirth
  7. Stratosphäre: Zusammensetzung und Transport
    Instructor: Univ.-Prof. Dr. Peter Hoor

SoSe 2026