Module B aims at detecting and classifying extreme weather events under past and future climate change. With statistical approaches, the modified  intensity and frequency for clearly defined spatio-temporal scales, which are derived together with module A or defined by the impact from module C, will be assessed. Furthermore, the attribution of man-made changes in the statistics of extreme events will be investigated. This includes various extreme indices, statistical significance of changes, influence of large-scale anomalies as well as advanced detection and attribution methods.