International Collaboration in Chemistry: Development and application of a tuneable diode laser spectrometer for water isotope measurement and scientific studies during cloud simulation experiments in the AIDA chamber

• Applicants: Professor Dr. Volker Ebert; Dr. Ottmar Möhler
• Subject Area: Physical Chemistry of Molecules, Liquids and Interfaces, Biophysical Chemistry ; Atmospheric Science
• Term: from 2010 to 2016
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 181901664

We propose a series of experiments in a cloud simulation chamber to investigate the inhibition of ice growth in cold cirrus clouds using the isotopic fractionation of water molecules during ice condensation as a novel tracer of microphysical processes. The development of the water isotope spectrometer and its application to investigate the inhibition of ice growth in simulated cirrus clouds is designed as a collaborative project between three experienced partners: PCI (Expertise: Laser/Molecular spectroscopy + TDL Sensors), Univ. Chicago (Atmospheric science and isotope research using airborne sensors) and KIT (Cloud experiments using the AIDA simulation chamber).

• DFG Programme: Research Grants
• International Connection: USA
• Participating Persons: Professorin Dr. Elizabeth J. Moyer; Dr. Harald Saathoff