Introduction to ICON

ICON contains a general circulation model of the atmosphere and is based on a grid that is derived from the icosahedron. The triangles of the icosahedron are further devided into smaller triangles, the edges of which are projected onto the surface of the sphere containing the icosahedron. This grid is an alternative to the well known longitude-latitude grids. The interesting aspect is that the new grid does not contain "singular points" as the poles and that the grid points have similar distances of each other everywhere on the globe.

This all-day course lasts for one week (Monday to Saturday) and offers an introduction to the use of the ICON model in its atmosphere variant using the echam physics that was developed at MPI-Hamburg. We will not discuss the underlying physics but we will emphasize the technical aspects, how simulations can be performed with this model and how the code can be modified according to individual needs. The most important data structures inside the model will be discussed and the implementation of a submodel will be demonstrated with the example of an age-of-air model. The following topics will be discussed in some detail:


-Simple simulation of the general circulation of the atmosphere (boundary conditions, initial conditions, parameters, namelist variables, scripts) -first evaluations of the results and assessment of the quality of the simulation -general overview of program structure -general overview of important data structures inside the code -implementation of additional submodels, modification of the existing code.

The course consists of lectures (20 hours) and practical exercises on the computer (18 hours). It is meant for persons who would like to work with ICON in their master thesis (in exceptional cases also bachelor thesis), thesis, or in research, and who would like to gain some inside into the technical aspects of the code.

The course will be held in English.