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© PD Dr. Ulrich Löhnert

Löhnert, Ulrich

PD Dr., Department of Geosciences, Institute of Geophysics and Meteorology, University of Cologne


University of Cologne
Institute of Geophysics and Meteorology
50923 Köln


Fon: +49 221 470 1779

Research topics

  • Life cycle of clouds: When, where, why and how do clouds form, evolve and dissipate?
  • Atmospheric thermodynamics in the cloudy boundary layer: Do atmospheric models capture the relation between cloud properties, thermodynamics and turbulence?
  • Networks of ground-based remote sensors: Can ground-based remote sensors be used to improve numerical weather prediction models?

Resources and technologies

  • Ground-based remote sensing: What synergy of different sensors achieves the best infromation content for atmospheric profiling?
  • Retrieval methodologies: What are the most suited physical/mathematical methods for converting measurements of radiation to atmospheric parameters?
  • JOYCE - Jülich Observatory for Cloud Evolution


  • Caumont, O., Cimini, D., Löhnert, U., Alados-Arboledas, L., Bleisch, R., Buffa, F., Ferrario, M. E., Haefele, A., Huet, T., Madonna, F. and Pace, G. (2016): Assimilation of humidity and temperature observations retrieved from ground-based microwave radiometers into a convective-scale NWP model. Q.J.R. Meteorol. Soc., 142: 2692–2704. doi:10.1002/qj.2860
  • Maahn, M. and U. Löhnert (2016): Potential of higher-order moments and slopes of the radar Doppler spectrum for retrieving microphysical and kinematic properties of Arctic ice clouds. J. Appl. Meteor. Climatol., doi: 10.1175/JAMC-D-16-0020.1.
  • Löhnert, U., J. H. Schween, C. Acquistapace, K. Ebell, M. Maahn, M. Barrera-Verdejo, A. Hirsikko, B. Bohn, A. Knaps, E. O'Connor, C. Simmer, A. Wahner, S. Crewell (2015): JOYCE: Jülich Observatory for Cloud Evolution Bulletin of the American Meteorological Society, 96, 1157-1174, doi:10.1175/BAMS-D-14-00105.1.
  • Illingworth, A., D. Cimini, C. Gaffard, M. Haeffelin, V. Lehmann, U. Löhnert, E. O'Connor, and D. Ruffieux (2015): Exploiting existing ground-based remote sensing networks to improve high resolution weather forecasts, Bull. Amer. Meteor. Soc. DOI:
  • Löhnert, U. and Maier, O. (2012): Operational profiling of temperature using ground-based microwave radiometry at Payerne: prospects and challenges, Atmos. Meas. Tech., 5, 1121-1134, doi:10.5194/amt-5-1121-2012.
  • full publication list: