Application of different weather pattern classifications to simulated future climate conditions for Central Europe
For the weather pattern classification we use the COST733 classification software (version 0.19-17). The 12 available classification methods (grouped into (i) optimization algorithms, (ii) leader algorithms, (iii) PCA based methods, and (iv) threshold based methods) are applied to the ERA40 daily mean sea level pressure database for 1961-1990 using 9, 18, and 27 weather pattern types. The resulting circulation pattern types from 1961-1990 classifications of the mean sea level pressure fields are applied to the classification of the 2071-2100 period for both A2 and B2 scenarios. Frequency distribution changes of circulation pattern types are analyzed in the selected domain by 2071-2100 period for both A2 and B2 scenarios relative to the 1961-1990 reference period. Furthermore, temperature anomaly and precipitation pattern changes are evaluated in the Carpathian basin (covering 45-49°N, 14-27°E) for each circulation pattern types using all the selected classification techniques.
Supplementary URL: http://www.cost733.org/