Antonello Provenzale, Consiglio Nazionale delle Ricerche, Institute of Geosciences and Earth Resources (IGG), Pisa, Italy, Lyuba Novi, CNR Institute of Geosciences and Earth Resources, PISA, Italy, Jost von Hardenberg, CNR Institute of Atmospheric Sciences and Climate, Bologna, Italy, David W Hughes, University of Leeds, Leeds, United Kingdom and Edward Spiegel, Retired, New York City, NY, United States