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RESEARCH
Staff
Overview
The Cloud group investigates the interactions between aerosol particles and clouds. In particular the formation and freezing of cloud droplets is examined. Furthermore, the interactions between in-cloud turbulence and its influences on cloud droplets is explored. The investigations are carried out in laboratory and field experiments accompanied by model simulations.
Laboratory experiments on aerosol-cloud interactions: At the "Leipzig Aerosol Cloud Interaction Simulator" (LACIS)
investigations concerning the hygroscopic growth, the activation and the
freezing of particles/cloud droplets are carried out under well-defined
laboratory conditions. The investigations will help to improve the
understanding and quantification of the interactions between aerosol
particles and clouds.
Field experiments on aerosol-cloud interactions: By means of the "Counterflow Virtual Impactor" technique, the sampling and
evaporation of drops and ice particles in tropospheric clouds are carried
out in order to determine the physico-chemical properties of cloud
condensation and ice nuclei. These measurements provide important
conclusions about the drop activation and heterogeneous ice nucleation
which leads to an improved description of the climate forcing and
precipitation capability of tropospheric clouds.
Turbulence in clouds: Observations with high spatial resolution are performed in the lower atmosphere with the helicopter-borne ACTOS. The measurements focuse on cloud turbulence and the effect of turbulence on cloud droplets.
Current topics
Projects
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