WETRAX - WEather Patterns, Cyclone TRAcks and related precipitation EXtremes

WEather Patterns, Cyclone TRAcks and related precipitation EXtremes

Start date: 01.06.2012
End date: 31.05.2015
Funded by: Bayerisches Landesamt für Umwelt
Local project leader: Prof. Dr. J. Jacobeit Dr. A. Philipp Dr. C. Beck Dipl. Geogr. M. Homann
External scientists / cooperations: ZAMG - Zentralanstalt für Meteorologie und Klimatologie (Mag. M. Hofstätter)
Bayerisches Landesamt für Umwelt


Excessive large-scale precipitation events are linked with a high occurrence probability of extreme flooding events and can be related to certain atmospheric circulation patterns.

WETRAX investigates circulation patterns that are - in a statistically significant way - connected to extreme precipitation events in the area of Austria and southern Germany. Concerning relationships between large-scale circulation types and regional impacts, a catalog with excessive precipitation events, according to different weather types and storm tracks of cyclones is designed for the 1951-2010 period. Furthermore two different generations of global climate models are evaluated with respect to their ability to reproduce these atmospheric characteristics over the central European region. On the basis of respective climate scenarios estimates of future heavy precipitation events under enhanced greenhouse warming conditions are derived.

The superordinate objective of WETRAX is the circulation based determination of the changed likelihood of excessive large-scale precipitation events in the region of Austria und southern Germany under future climate change conditions. This results in a potential change of flood risks within the watersheds of the investigation area. The derived results will provide an important basis for the planning of national water management strategies.