Atmospheric Multiphase Chemistry in Lab and Field Experiments and Modeling
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This lecture will first introduce into the topic and describe the atmospheric multiphase system. Then, a path which also corresponds to the development of the presenters work is being followed. First, there have been laboratory experiment on atmospheric aqueous phase chemistry which will be described with some select more recent results. Then, in the second part, our multiphase chemistry model CAPRAM with its development, current possibilities and applications is being described and discussed. Third, field measurements on how to investigate tropospheric multiphase chemistry with emphasis on coupled aerosol-cloud interaction experiments will be treated regarding their development. Then, the activities of the presenter, his group and collaborators in ground-based hill-capped cloud experiments will be outlined with their main results. Finally, the most recent developments, i.e. the construction of the permanent time-series aerosol-cloud observatory at the Schmücke mountain in Thuringia (SCO) will be described. Finally, an outlook on the field will be given.
Prof. Hartmut Herrmann is Head of the Atmospheric Chemistry Department (ACD) at the Leibniz Institute for Tropospheric Research (TROPOS) in Leipzig, Germany. His research focuses on multiphase atmospheric chemistry, with emphasis on gas-phase, aqueous-phase, and aerosol chemical processes and their interactions in the troposphere. He studied chemistry at the University of Göttingen and completed his PhD in 1990. Following academic positions in Hannover and Essen and a research stay at the California Institute of Technology (Caltech), he obtained the Venia Legendi in Physical Chemistry before joining TROPOS. Prof. Herrmann has authored more than 470 peer-reviewed journal articles and 22 book chapters. His work combines laboratory and field experiments with mechanism development and numerical multiphase modeling, including the development of the CAPRAM modeling system. He teaches atmospheric chemistry and related courses at Leipzig University and supervises bachelor’s, master’s, and doctoral research projects in the field of atmospheric chemistry. He is a member of the Leibniz-Society of Berlin and the Academia Europaea, and received the American Chemical Society’s Honor Award for Scientific Excellence in 2024.