Simulation of Particle Precipitation Effects on the Atmosphere with the MESSy Model System

Focusing on particle precipitation into the atmosphere we present whole-atmosphere model developments as well as scientific results using the Modular Earth Submodel System (MESSy). Parameterizations for Solar Proton Events as well as low-energy-electron precipitation are described and the implementation as MESSy submodels is outlined. Direct and indirect effects found in simulations using MESSy with the basemodel ECHAM5, a general circulation model, are discussed. As an additional development, the middle and upper atmosphere model CMAT2 was implemented as a MESSy basemodel and as a submodel for ECHAM5/MESSy to create a whole atmosphere model. This opens up new perspectives for particle precipitation modeling and some initial results are shown.