Characterization of an Aerosol Situation over Sofia, Bulgaria, Influenced by Wildfire Smoke from Canada Based on Lidar and Sun Photometer MeasurementsTsvetina Evgenieva, Ljuan Gurdev, Zahari Peshev, Liliya Vulkova, Eleonora Toncheva, Stefan Dosev, Lyubomir Popov, Orlin Vankov and Tanja DreischuhEPJ Web Conf., 362 (2026) 03003DOI: https://doi.org/10.1051/epjconf/202636203003