This project is funded by the German Research Foundation (DFG) and the Swiss National Science Foundation (SNSF).

Main goals of the project are

• analysis of the physical and chemical properties of aerosol particles that initialize the ice particle formation in mixed-phase clouds
  
• characterization of the microphysical and light scattering properties of the formed ice particles

These goals are adressed by using a new Ice Selective Inlet (ISI) for the extraction of ice particles from natural mixed-phase clouds during several month in the cold season at the High Altitude Research Station Jungfraujoch (3568 m a.s.l). The ISI will be developed by the Paul Scherrer Institute in Switzerland (details of this project part can be found here).

IMK-AAF will characterize the ice particle fraction and its angular light scattering properties by deploying the in situ single cloud particle probes SID-3 and PHIPS in mixed-phase clouds that are in frequent contact with the Jungfraujoch station during the winter season. IMK-AAF will also integrate the novel Particle Phase Discriminator (PPD2) into the ISI inlet in order to perform a detailed analysis of the microphysical properties of the ice particles like habit and surface roughness properties.