The coordination of the work packages in Module B aims for the strengthening of the links among the Module B partners and between Module B and the other modules. For that purpose annual Module B workshops will take place to exchange information about the status of the work packages. The coordinator will report on Module B topics and results at the other modules' workshops and observe their research progress that is relevant for Module B. The coordinator assesses the findings of the Module B work packages whether they are suitable for implementation in the MiKlip prediction system. This is also discussed with the MiKlip steering committee.
Another aim of B-Coordination is the improvement of the process understanding of extreme events. For this purpose the simulations performed with the MiKlip prediction system are analyzed for periods of extreme events such as heat waves. It should be clarified which large-scale atmospheric processes are necessary to enable such extreme events. Another focus is on investigating the predictability of these events. This includes the consideration of the influence of decadal variability, i.e. it is necessary to clarify whether processes of decadal variability also have an impact on extreme events and whether there is an accumulation of extreme events in particular decades.
For the analysis of processes that lead to extreme events, the focus was on the influence of the North Atlantic on Europe. In winter the North Atlantic Oscillation (NAO) is the main driver for European weather patterns. It has a stronger impact on minimum than on maximum temperature with the largest effect over Northern Europe. For precipitation strongest impact can be found over the Iberian Peninsula and Norway, whereas for snow fall and snow cover over Southern Scandinavia, the Baltic States and Northern Germany.
In addition, the impact of the Atlantic Multidecadal Variability (AMV) on Europe was analysed. Both maximum and minimum temperature show for summer and winter quite consistent patterns for the warm and the cold phase of the AMV. During AMV warm phases a cooling is found over Northern and a warming over Southern Europe. During AMV cold phases a warming is found over Eastern and a cooling over Western Europe. These patterns are more pronounced in winter.
Babian, S. | H.W. Rust, J. Grieger, K. Prömmel and U. Cubasch