Aerosol nucleation in the upper troposphere (A03)

• Subject Area: Atmospheric Science
• Term: since 2021
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 428312742

The project will investigate new particle formation processes in the extratropical UTLS region. We intend to measure the key precursor gases of aerosol nucleation and initial particle growth by flying a new CI-APiTOF mass spectrometer onboard HALO. The measurements will be conducted as part of the HALO mission CONTANGO-FIRE which will take place in central Argentina in January/February 2028 as a central part of the 2nd phase of TP-Change. The involvement of precursors such as isoprene organonitrates, sulfuric acid, and ammonia at the molecular scale. The measurements are complemented by model simulations to investigate the vertical transport mechanisms, turbulent mixing processes, chemical reactions in the gas and aqueous phase, as well as aerosol chemical and microphysical processing.

• DFG Programme: CRC/Transregios
• Subproject of: TRR 301: The tropopause region in a changing atmosphere
• Applicant Institution: Johannes Gutenberg-Universität Mainz
• Project Heads: Professor Dr. Joachim Curtius; Professor Dr. Holger Tost