Matteo Cini, CNR Institute of Atmospheric Sciences and Climate, Bologna, Italy; University of Turin, Turin, Italy, Giuseppe Zappa, National Research Council of Italy, Institute of Atmospheric Sciences and Climate, Bologna, Italy, Susanna Corti, CNR, Institute of Atmospheric Sciences and Climate, Bologna, Italy, Francesco Ragone, University of Leicester, Leicester, United Kingdom, Valérian Jacques-Dumas, Institute for Marine and Atmospheric Research Utrecht, Utrecht, Netherlands and Henk Dijkstra, Utrecht University, Institute for Marine and Atmospheric research, Utrecht, Netherlands