Icon consists of several models - a general circulation model of the atmosphere with physics in different flavors (LEM = large eddy model, NWP = numerical weather prediction physics, ECHAM = modified ECHAM physics for climate simulations), an ocean model, and a land model. The subject of this lecture is ICON with ECHAM physics.

All these models use a common infrastructure.

The simulation of the general circulation of the atmosphere is based on an icosahedral grid and is calculated using a set of non-hydrostatic equations.

My lecture on ICON explains how to compile and run the model in the case of ECHAM physics. In a second part, the overall model structure and how you can add new processes to the ECHAM physics is explained.

Here, you can download my lecture.

ECHAM6 is a hydrostatic general circulation model of the atmosphere using an expansion in spherical harmonics of temperature, surface pressure, divergence, and vorticity in the solution of the basic equations. However, the parameterized physics and the transport of water vapour, hydrometeors, and trace gas species are performed in "grid point space".

This lecture helps you to get started with ECHAM6 (compiling, running simple experiments), explains the overall program structure, and how to introduce new physics processes in form of "sub-models".

Here, you can download my lecture.

Atmospheric chemistry together with atmosphere dynamics explain the composition of the atmosphere. The ozone layer protects us from harmful UV-radiation, it is responsible for chemical heating in the stratosphere such that temperature increases with altitude within the stratosphere. The SO₂-oxidation creates sulfuric acid droplets reflecting solar radiation back into space and cooling the surface of the earth, e.g. after volcanic eruptions. Furthermore, health issues may be the consequence of "summer smog", i.e. high ozone values near the ground due to the reaction of certain trace gases under the influence of UV radiation.

My lecture is an elementary introduction to atmospheric chemistry in German. It starts with basic chemistry and develops various aspects of atmospheric chemistry like the ozone layer, the ozone hole, "summer smog", formation of sulfuric acid in the atmosphere, and very basic aspects of measurements of trace species. I always tried to make the reader understand the basics and did not attempt to present complete reaction pathways. The lecture is meant for about 24 hours of teaching.

Here, you can download my lecture.