Case Study
CCN Research - GCVI
aerosol-cloud interactions and contrasting clean marine air masses

Dr. Radovan Krejci in the Department of Applied Environmental Science (ITM) of Stockholm University deployed Brechtel Model 1205 Ground-CVI from during the Cloud and Aerosol Experiment Åre (CEASAR) from July to October 2014. This was the first field deployment of the GCVI. The measurements were made at 1200 MSL on top of Mt. Åreskutan, within the famous Swedish ski resort Åre. The project is focused on aerosol-cloud interactions and contrasting clean marine air masses with air influenced by terrestrial boreal forest biogenic emissions and anthropogenically influenced European air masses. Special attention is being paid in the data analysis to partitioning of absorbing aerosol between interstitial aerosol and cloud droplets as well as aerosol removal processes. The project is a collaboration between ITM, the Finnish Meteorological Institute and the Paul Scherrer Institute. During the experiment several hundred hours of aerosol and cloud microphysical data have been collected, including key properties of the dried cloud residual CCN from the GCVI.

Ground-based Counterflow Virtual Impactor Inlet System (GCVI)