Modification of fronts by the Alps: Simulations and numerical experimentation |
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Authors: | Dr. A. Tafferner Dr. J. Egger |
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Affiliation: | (1) Present address: Meteorologisches Institut, Universität München, Theresienstraße 37, D-W-8000 München 2, Germany |
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Abstract: | Summary An isentropic limited area model is used to simulate and investigate the frontal passages of 3 May and 8 October 1987. It is demonstrated that a southward outbreak of air with high potential vorticity on 3 May 1987 affected the propagation of the front to the north of the Alps and the related formation of an orographic jet. Moreover, the outbreak plays a crucial role in the genesis of a lee cyclone. On the other hand, no such outbreak occurred on 8 October 1987 and it is shown that the propagation of the front near the ground was hardly affected by the flow at upper levels.With 10 Figures |
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