Research Groups



IMK-AAF Research Groups


Head: Dr. Ottmar Möhler


This group investigates aerosol-cloud-processes, in particular primary ice formation in atmospheric clouds using the AIDA facility, and develops parameterisations of these processes for use in atmospheric cloud, weather and climate models. We also develop new methods and instruments to measure and characterise ice nucleating particles both in laboratory and field projects.

Aerosol Chemistry and Air Quality

Head: Dr. Harald Saathoff


We characterise complex aerosol systems like secondary organic aerosol (SOA) or combustion emissions regarding their chemical and physical properties relevant for climate, weather and air quality. Simulation chamber process studies on aerosol formation and aging over a wide range of atmospheric conditions are complemented by field studies focussing on special weather situations like heatwaves at dedicated locations ranging from remote mountain sites to polluted urban areas.


Airborne Cloud Observations

Head: Dr. Emma Järvinen


The group investigates the interaction of ultraviolet and visible light with atmospheric aerosol and cloud particles in order to (i) measure their shortwave spectral optical properties, (ii) deduce the bioaerosol content, and (iii) study the structural details of ice particles. We develop optical instrumentation that is deployed in aircraft missions, mountain top studies, and cloud chamber experiments.

Cloud Microphysics

Head: Dr. Alexei Kiselev


The group investigates microphysical cloud processes like the nucleation of liquid water and ice, droplet collisions and fragmentation and secondary ice processes in laboratory experiments. The main tools are single droplet electrodynamic balances, cold stages, particle traps, mass spectrometry, nonlinear optics and environmental scanning electron microscopy.