Unstationary aspects of föhn in a large valley

Autor(en)

Reinhold Steinacker

Abstrakt

After an outline of the scientific questions within FORM (Foehn study in the Rhine valley during MAP) some results are being discussed, which allow a deeper insight into the unstationary behavior of foehn in a complex Alpine valley. Due to an extremely dense and sophisticated instrumentation of in situ and remote sensing platforms the themodynamic and dynamic structure could be nicely investigated. It was clearly seen that the static stability within valleys may be quite complex, leading often to a three rather than two layer configuration. Simulations with different very high resolution models allow to derive the critical factors which determine the usefulness of the model with respect to local foehn prediction. Of special importance is the correct treatment of the shallow cold air pool. Considering the scientific results so far obtained of the different types of foehn events during MAP-SOP (MAP Special Observing Period, 7 September - 15 November 1999) the FORM initiative can be seen as a very successful part of MAP.

Organisation(en)

Institut für Meteorologie und Geophysik

Journal

Hrvatski meteoroloski casopis = Croatian meteorological journal

Seiten

72-76

Anzahl der Seiten

5

ISSN

1330-0083

Publikationsdatum

2005

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/72d06fa0-e694-475b-80ce-ee373a269b48