We present two case studies of long-range transport of stratospheric ozone in the troposphere and of tropospheric ozone photochemically produced by forest fires in Germany, Canada and USA, over the Aerological station of MeteoSuisse, at Payerne, Switzerland, during Spring 2023. The ozone measurements were supported by collocated water vapor Raman lidar measurements and ozone radiosoundings.
Kralli et al. (Thu,) studied this question.