Stratospheric intrusion (SI) events are a topic of ongoing research. especially because of their ability to change the oxidation capacity of the troposphere and their contribution to tropospheric ozone levels. In this work. a novel tool called STEFLUX (Stratosphere-to-Troposphere Exchange Flux) is presented. https://www.roneverhart.com/HP-Pavilion-15-eg1053cl-15-6-FHD-Touch-Intel-Core-i5-1235U-3-30-GHz-Intel-Iris-Xe-Graphics-12-GB-DDR4-RAM-512-GB-SSD-/