Seminarium fizyki atmosfery

Measurements of cloud droplet size distributions and number concentrations at a mountaintop laboratory

mgr Moein Mohammadi

Instytut Geofizyki Wydział Fizyki Uniwersytet Warszawski


26 marca 2021 13:15, on-line via ZOOM

Microphysical properties of cloud droplets, such as droplet size distribution and droplet number concentration have been studied after performing a series of field experiments in summer 2019 at Umweltforschungsstation Schneefernerhaus (UFS), an environmental research station located just below the peak of Zugspitze in the German Alps. “VisiSize D30” manufactured by Oxford Laser Ltd. is a shadowgraph imaging instrument utilized for the first time to measure size and velocity of cloud droplets during this campaign after already passing the laboratory tests successfully. Furthermore, while turbulent orographic clouds passing our measurement site at UFS observatory, a Phase Doppler Interferometer (PDI) device, manufactured by Artium Tech. Inc., was also constantly measuring droplets passing through its probe volume. The results of analysing data collected by the two instruments are going to be presented during this seminar.