Christoph Brühl, (Partner of P2, P3 and P4), Dr.,is a senior scientist in the atmospheric chemistry department led by Prof. JosLelieveld at the Max-Planck-Institute for Chemistry. His main focus is now a version of the CCM EMAC with aerosol. He was involved in a lot of national and international projects, for example the EU integrated project SCOUT−O3 (CCMVal) and the validation of HALOE satellite data in the HALOE-Team at NASA Langley, Hampton, VA, USA.