Curriculum vitae

Positions

Education

  • 2021–2024M.Sc. Physics, Leipzig University, Leipzig
  • 10/2017–2021B.Sc. Physics, Leipzig University, Leipzig

Field campaigns

Thin clouds over sea ice, seen from Polar 5 during COMPEX

2026 COMPEX

Polar 5 · Svalbard: Ny-Ålesund, marginal ice zone

Flight planning, scientific instrument operation

Blog (Uni Köln)

The tethered balloon BELUGA at Ny-Ålesund during AIDA

2024 AIDA

Tethered balloon BELUGA · Ny-Ålesund, Svalbard

Weather forecasting, balloon handling, measurements

Publications (first author)

  1. Fig. 7

    Müller, J., Schäfer, M., Rosenburg, S., Ehrlich, A., Wendisch, M. (2025). High-resolution maps of Arctic surface skin temperature and type retrieved from airborne thermal infrared imagery collected during the HALO–(AC)³ campaign. Atmospheric Measurement Techniques, 18(18), 4695-4708. doi:10.5194/amt-18-4695-2025

    With the thermal camera VELOX on board HALO, we mapped the surface temperature and surface type of Arctic sea ice pixel by pixel; the temperatures agree with MODIS within 2 K.

    Fig. 7: Müller et al. (2025), CC BY 4.0

Publications (co-author)

  1. Fig. 2

    Risse, N., Mech, M., Prigent, C., Müller, J., Crewell, S. (2026). Cloud liquid water path detectability and retrieval accuracy from airborne passive microwave observations over Arctic sea ice. Atmospheric Measurement Techniques, 19(6), 2197-2223. doi:10.5194/amt-19-2197-2026

    How well do microwave radiometers see liquid water in clouds over sea ice? In the central Arctic from about 50 g per square metre; towards the ice edge the threshold rises to about 350.

    Fig. 2: Risse et al. (2026), CC BY 4.0

  2. Fig. 13

    Paulus, F., Müller, J., Kirbus, B., Sodemann, H., van Gelder, L., Walbröl, A., Wendisch, M., Neggers, R. (2026). Impacts of mesoscale atmospheric subsidence on cloud glaciation and decoupling in Arctic marine cold air outbreaks. Atmospheric Chemistry and Physics, 26(19), 13983-14014. doi:10.5194/acp-26-13983-2026

    A large-eddy simulation of a cold-air outbreak over the Fram Strait shows that weaker sinking motion lets the boundary layer grow deeper and the clouds turn to ice sooner.

    Fig. 13: Paulus et al. (2026), CC BY 4.0

  3. Fig. 3

    Dorff, H., Siebert, H., Navale, K., Ehrlich, A., Müller, J., Schäfer, M., Wu, F., Wendisch, M. (2026). Tethered balloon-borne measurements to characterise the evolution of the Arctic atmospheric boundary layer at the Villum Research Station. Earth System Science Data, 18(4), 2799-2817. doi:10.5194/essd-18-2799-2026

    Twenty-eight tethered-balloon flights with more than 300 profiles at Villum Research Station in Greenland track how the lowest few hundred metres of the atmosphere change as polar night turns into polar day.

    Fig. 3: Dorff et al. (2026), CC BY 4.0

  4. Fig. 1

    Schäfer, M., Wolf, K., Ehrlich, A., …, Müller, J., et al. (2022). VELOX – a new thermal infrared imager for airborne remote sensing of cloud and surface properties. Atmospheric Measurement Techniques, 15(5), 1491-1509. doi:10.5194/amt-15-1491-2022

    VELOX, a six-channel thermal infrared camera adapted for research aircraft, sees clouds and surfaces at about 10 m resolution from 10 km altitude, after careful calibration.

    Fig. 1: Schäfer et al. (2022), CC BY 4.0

Other

  • Funded by the Deutsche Forschungsgemeinschaft (DFG) within the Transregional Collaborative Research Centre TRR 172 (AC)³, project number 268020496.
  • Müller, J. J., Klingebiel, M., Jäkel, E., Mech, M., and Wendisch, M. (2026). COMPEX-EC: An Arctic airborne campaign for EarthCARE validation. Wissenschaftliche Mitteilungen aus dem Institut für Meteorologie der Universität Leipzig, 64, 19–25.
  • Schuchard, M., Bärfuss, K., Bretschneider, L., Conrath, T., Held, A., Käthner, R., Kellermann, M., Lampert, A., Mathes, T., Müller, J., Pilz, C., Schlerf, A., Siebert, H., Wehner, B., and Harm-Altstädter, B. (2026). Arctic aerosol and meteorological observations using airborne and ground-based systems in spring 2024. Earth System Science Data Discussions (in review), doi:10.5194/essd-2026-411.
  • Müller, J. J., et al. (in preparation). Evaluation of a kilometre-scale ICON simulation of the Arctic spring with satellite-derived sea-ice concentration.
  • Simon, D. J., Schaefer, J., Hartmann, J., Kirbus, B., Müller, J., Hartmann, M., Wetzel, B., Köhler, L., Jörss, A.-M., Weinhold, K., Herber, A., Jurányi, Z., Henning, S., Roberts, G. C., Wendisch, M., Pöhlker, M. L., and Stratmann, F. (2026). Frequent occurrence of newly formed aerosol particles over wide geographical areas in the Arctic free troposphere and atmospheric boundary layer. EGUsphere (preprint, in review), doi:10.5194/egusphere-2026-2215.