Roberta Benincasa¹, Jeffrey Weiss², Danni Du³, Gregory S. Duane⁴ and Nadia Pinardi^1,5, (1)University of Bologna, Department of Physics and Astronomy, Bologna, Italy, (2)University of Colorado at Boulder, Department of Atmospheric and Oceanic Sciences, Boulder, United States, (3)Princeton University, Department of Atmospheric and Oceanic Sciences, Princeton, United States, (4)Univ of Colorado, Atmospheric and Oceanic Sciences, Boulder, United States, (5)Euro-Mediterranean Center on Climate Change, Bologna, Italy