Volker Matthias is Head of Department Chemistry Transport Modeling at Helmholtz-Zentrum Geesthacht Center for Materials and Coastal Research. His research focus is on emissions, transport and transformation of pollutants in the atmosphere and the application of complex three-dimensional models to get a comprehensive picture of the state of the atmosphere and its constituents. Currently his main interests are the effect of ship emissions on air pollution and nitrogen deposition in Europe. He participated in several national and European projects and is author of more than 80 scientific papers and contributions to books. He teaches topics related to atmospheric chemistry at the University of Hamburg and Leuphana University Lüneburg.