Regional Climate Modeling with COSMO-CLM: Performance Assessment and Climate Projections

Dear Colleagues,

The COSMO-CLM is a non-hydrostatic regional community climate model based on the COSMO model, which was originally developed by the Deutscher Wetterdienst (DWD). The climate limited-area mode of the COSMO model was developed and is maintained by the Climate Limited-area Modelling Community (CLM-Community). The model has been used for simulations on time scales up to centuries and spatial resolutions between 1 and 50 km. In the last ten years, it was used for downscaling for many regions of the world and for many of the global climate simulations available, in particular in the frame of the CORDEX and CORDEX CORE initiatives, in order to provide a core set of comprehensive and homogeneous projections across almost all CORDEX domains.

The main aim of this Special Issue is to summarize the recent progress achieved with COSMO-CLM. It represents an important dynamical downscaling tool for providing the information needed for assessing climate change impacts, and a powerful model for improving our understanding of regional climate processes. The following four important segments should be at least included:

• Investigation of the capabilities of COSMO-CLM at very high resolution (convection resolving) to describe the mesoscale features of climate in a recent-past period for selected areas;
• Assessment of the effects of increasing resolution on the quality of results; such an analysis could be useful to stimulate in the future the scientific community to consider that, at least in some areas, high-resolution simulations could provide good earnings;
• Climate projections over targeted regions by employing the IPCC RCP scenarios, widening the range of projections already available in the literature but with higher resolution;
• Assessment of the model’s ability to (realistically) represent the extreme weather events in the present climate as a preliminary and fundamental step to assess changes regarding extreme weather events expected under anthropogenic climate change.

Dr. Edoardo Bucchignani
Dr. Christian Steger 
Guest Editors

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