Lidar Observations of Birch and Spruce Pollen in FinlandS. Bohlmann, X. Shang, E. Giannakaki, M. Filioglou, A. Saarto and M. KomppulaEPJ Web Conf., 237 (2020) 02021DOI: https://doi.org/10.1051/epjconf/202023702021