Organic aerosols mixing across the tropopause and its implication for anthropogenic pollution of the UTLS. - Breuninger, Anna; Joppe, Philipp; Wilsch, Jonas; Schwenk, Cornelis; Bozem, Heiko; Emig, Nicolas; Merkel, Laurin; Rossberg, Rainer; Keber, Timo; Kutschka, Arthur; Waleska, Philipp; Hofmann, Stefan; et al. (Atmospheric Chemistry & Physics, 2025)