Nina Dresing¹, Frederic Effenberger², Raul Gomez-Herrero³, Bernd Heber¹, Andreas Klassen¹, Alexander Kollhoff⁴, Ian G Richardson⁵ and Solveig Theesen¹, (1)University of Kiel, Kiel, Germany, (2)Bay Area Environmental Research Institute, Moffett Field, United States, (3)University of Alcala, Alcala de Henares, Spain, (4)IEAP, University of Kiel, Kiel, Germany, (5)NASA Goddard Space Flight Center, Greenbelt, MD, United States