Fine scale composition gradients and mixing at the tropopause region (B01)

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

To study the effect of small scale mixing processes on the ExTL depth we will combine simultaneous fast (> 1Hz) airborne measurements of trace gases multicslae modelling using the MECO(n) system. This will partly be done by measuring species and aerosol properties redundantly on two different platforms also providing potential temperature on two levels, which will be used to analyse composition changes associated with potential temperature fluctuation to identify cross isentropic mixing. The observations will be accompanied by atmospheric chemistry modelling efforts from the km-scale to the region-al scale using the MECO(n) modelling system. This allows for a specific process analysis and the estimate of the impact and representation of individual processes (especially cirrus convection and CAT) to the UTLS gradients of humidity and ozone.

• DFG Programme: CRC/Transregios
• Subproject of: TRR 301: The tropopause region in a changing atmosphere
• Major Instrumentation: Quantum Cascade Laser
• Applicant Institution: Johannes Gutenberg-Universität Mainz
• Project Heads: Professor Dr. Peter Hoor; Professor Dr. Holger Tost