Climatology of Transient Luminous Events and Lightning Observed Above Europe and the Mediterranean Sea - Enrico Arnone; József Bór; Olivier Chanrion; Veronika Barta; Stefano Dietrich; Carl-Fredrik Enell; Thomas Farges; Martin Füllekrug; Antti Kero; Roberto Labanti; Antti Mäkelä; Keren Mezuman; et al. (Surveys in Geophysics, 2020)