Investigating the Transport of Stratospheric Ozone into the Troposphere During the Severe Weather Outbreak of 15-20 April 2011

Tropopause folding is a vital mechanism influencing the stratosphere-troposphere exchange (STE) of air masses, significantly impacting atmospheric composition and dynamics on synoptic scales. This process facilitates the transport of ozone-rich, dry stratospheric air into the troposphere, thereby contributing to the tropospheric ozone budget. Pan et al. (2014) detail an anvil wrapping model associated with mesoscale convective systems, which operate on a smaller scale and also play a significant role in modulating the tropospheric ozone budget. Building on previous studies, our research integrates components of both the tropopause folding and anvil wrapping mechanisms, using observational in situ data from ozonesondes deployed near synoptic and mesoscale convective events. Our study investigates the intrusion of stratospheric air above Idabel, Oklahoma, from April 15th to April 20th, 2011, to determine the diverse mechanisms responsible for ozone transport. During this period, an enhanced upper-level jet streak and a negatively tilted trough contributed to a severe weather outbreak in the southeastern United States. To comprehensively capture the evolution and impacts of this event, we utilize high-resolution meteorological data, ozonesonde measurements, and the HYSPLIT trajectory model. This study serves as an excellent in situ dataset that aligns with the Pan et al. model, offering insights into both tropopause folding and anvil wrapping, and their effects on tropospheric ozone levels.