3-D model simulation of orographic clouds and snowfall over Funka Bay. Pt. 1: formation of clouds street by topography and air mass transformation. - Eine Simulation von orographisch-induzierten Wolken und Schneefall ueber der Funka Bay mit Hilfe eines 3-D-Atmosphaeren-Modells. T. 1: Entwicklung von Wolkenstrassen durch orographischen Einfluss und Luftmassenaenderung

The development of mixed layers and the formation of cloud street over Funka Bay during cold air outbreaks were simulated by using the three dimensional non-hydrostatic model GESIMA (Geesthacht Simulation Model of the Atmosphere). The model successfully produced the cloud street over Funka Bay with properties similar to that of the cloud streets observed by satellite. The predominant northwesterly winds were changed complexly over Funka Bay because of the various orography around the bay. A remarkable convergence line was developed after three hours of simulation which was consistent with wind fields observations existing over Funka Bay. The model also simulated the development of a mixed layer over the bay through the heat and moist fluxes from the relatively warm sea. It is indicated that the orography and air mass transformation are the main factors for the cloud formation. (orig.)SIGLEAvailable from TIB Hannover: RA 3251(99/E/13) / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekDEGerman