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Entraining structures in laboratory analog of clouds: temperature inversion and overshooting updrafts

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We simulate mixing at the top of a cloud in a laboratory chamber and observe entraining structures by means of Particle Image Velocimetry (PIV) technique. Two different cases corresponding to different atmospheric situations: an overshooting cumulus cloud penetrating through a temperature inversion (layer of high static stability) and a weak convective updraft in a stratocumulus diverging below a temperature inversion, are studied. We show that entraining eddies in these cases are characterized by the opposite circulations.

Author(s):

Anna Górska    
University of Warsaw, faculty of Physics, Institute of Geophysics
Poland

Szymon Malinowski    
University of Warsaw, Faculty of Physics, Institute of Geophysics
Poland

Slawomir Błoński    
Institute of Fundamental Technological Research, Polish Academy of Sciences
Poland

Tomasz Kowalewski    
Institute of Fundamental Technological Research, Polish Academy of Sciences
Poland

Piotr Korczyk    
Institute of Fundamental Technological Research, Polish Academy of Sciences
Poland

Wojciech Kumala    
University of Warsaw, faculty of Physics, Institute of Geophysics
Poland