Scientific – technical questions

The following specific questions are addressed to determine the influence of convective transport, removal and the photochemical effects of non‐methane volatile organic compounds (NMVOC), oxidized volatile organic compounds (OVOC) and nitrogen oxides (NOx) on radical formation and loss processes:

Can we constrain the radical chemistry in air masses influenced by:

a. convective tracer transport (e.g., high NMVOC, NOx)? 
b. large‐scale tracer transport (e.g., moderate NMVOC, NOx)? 
c. lightning (e.g., low NMVOC, high NOx)? 
d. and in the middle troposphere (e.g., low NMVOC, NOx)?

What are the controlling OH and HO₂ radical sources/sinks?
Can we quantitatively understand the observed NO/NO₂, NOx/HNO₃ and OH/HO₂ ratios?
What are the main factors controlling HCHO/CH₃CHO, other OVOC and H₂O₂?
Can we quantify cloud "processing“, photochemical “ageing” of trace species and O₃ formation during transport in the atmosphere?
What fraction of air pollution in the upper troposphere could be transported into the stratosphere?