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WP2.3 Key Topics and Results

This research delves into the processes and dynamics of atmospheric blocking, examining seasonal and interannual climate variability using ERA15 and ERA40 climatology. Key findings highlight the relevance of diabatic processes in blocking phenomena, teleconnection patterns, and the interaction between tropical and extratropical systems. The study emphasizes the significance of cyclogenesis, extreme weather events, and their relation to synoptic patterns and orographic influences. Tools for climatological analysis and Lagrangian dynamics are discussed in the context of impacts on Europe amid climate change.

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WP2.3 Key Topics and Results

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  1. WP2.3 Key Topics and Results • Seasonal / interannual climate variability Processes and Dynamics of Atmospheric Blocking Dynamical view on blocking, index definition ERA15 climatology Relevance of diabatic processes ERA40 climatology of blocking Schwierz, Maspoli, Davies; GRL, 2004 Schwierz, Wernli, Davies, 2005 Teleconnection Patterns and Wave Propagation Rossby Wave guide, planetary wave propagation Tropical-Extratropical Interaction ERA40 climatologies of waves and streamers Schwierz, Dirren, Davies; JAS, 2003 Martius and Schwierz, 2005 Synoptic-scale interannual variability Interaction with orography ERA40 cyclone/anticyclone climatologies Schwierz and Davies; Tellus, 2003 Wernli and Schwierz, 2005, submitted to JAS Water Vapour variability, Ice core Interpretation Schwierz, Sodemann, Wernli, 2005 Sodemann et al., 2005, submitted to ACPD

  2. WP2.3 Key Topics and Results • Dynamics of extreme events Cyclogenesis and strong wind regions most damaging storms in ERA40 link to teleconnection patterns and synoptics Sänger, DA, 2003 Extreme Alpine Precipitation events link to streamers and waves link to teleconnection patterns Martius et al., 2005, submitted to Int.J.Clim. Zenklusen, DA, 2004 Tools and methods Climatological Event-based Data Analysis (ERA40) Idealised Modelling and Theory Lagrangian dynamics

  3. WP2.3 NCCR Collaborations Processes and Dynamics in a changing climate Global Climate Models WP1.1, WP2.1 Regional Climate Models WP2.2 Transport and water vapour WP1.3 Teleconnection Patterns and Extreme Events Impact on Europe (blockings) WP2.5 Changing Climate and Wind Damage WP2.2, SwissRe

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