COSMO-2: Very High-Resolution Model for the Alpine Region

The very high-resolution numerical weather prediction model COSMO-2 provides, with a grid spacing of 2.2 km, detailed and accurate forecasts for the entire Alpine region out to 24 hours in advance. This new model became operational on 27 February 2008.

An important part of the continuing development is the improvement and optimization of the data assimilation system at the kilometer scale. Apart from ingesting new types of data, the appropriate assimilation of high-resolution (spatial and temporal) data in complex topography is a challenge and needs careful attention.

The developments related to COSMO-2 are tightly linked to the project CN-MET, which aims at providing an integrated observing and forecasting system for monitoring and emergency planning in the vicinity of the Swiss nuclear power stations. In addition to dedicated and optimized observation platforms, this system comprises the very high-resolution COSMO-2 as both diagnostic and prognostic tool, and makes sure that observations and model are used in an optimal way for the best possible description of the atmospheric transport.