On the effect of a foehn on cold fronts in the vicinity of the Alps

Abstract

The present note discusses physical mechanisms which may contribute to cold air channelling close to the Alps. This involves the modification of the prefrontal air by the warm foehn air and of the postfrontal air by blocking effects resulting in an increase in precipitation. Additionally the influence of a sloping surface in the vicinity of the orography is considered. The problems are discussed in term of a north-south-oriented cold front behaving as an atmospheric gravity current propagating along the east-west oriented Alps.

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Hoinka, K.P. On the effect of a foehn on cold fronts in the vicinity of the Alps. Boundary-Layer Meteorol 40, 199–203 (1987). https://doi.org/10.1007/BF00140076

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Keywords

  • Precipitation
  • Physical Mechanism
  • Slope Surface
  • Cold Front
  • Present Note