External #particle mixing influences #hygroscopicity in a sub-urban area – video abstract of https://doi.org/10.5194/acp-25-741-2025 in ACP @EuroGeosciences -> https://www.youtube.com/watch?v=gcLv2u1khLc&t=2s / #ACROSS 2022 campaign at #LSCE-#SIRTA #Paris #clouds #CCN @dfg_public @agencerecherche #ACTRIS @hh24.bsky.social @leibnizwgl