Reply to Kern, C. The Difficulty of Measuring the Absorption of Scattered Sunlight by H2O and CO2 in Volcanic Plumes: A Comment on Pering, et al. "A Novel and Inexpensive Method for Measuring Volcanic Plume Water Fluxes at High Temporal Resolution", Remote Sens. 2017, 9, 146

Tom D. Pering 1,* ID , Andrew J. S. McGonigle 1,2,3 ID , Giancarlo Tamburello 4, Alessandro Aiuppa 2,5, Marcello Bitetto 4, Cosimo Rubino 4 and Thomas C. Wilkes 1 ID 1 Department of Geography, University of Sheffield, Winter Street, Sheffield S10 2TN, UK; [email protected] (A.J.S.M.); [email protected] (T.C.W.) 2 Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Palermo, via Ugo La Malfa 153, 90146 Palermo, Italy; [email protected] 3 School of Geosciences, The University of Sydney, Camperdown NSW 2006, Australia 4 Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna, via Donato Creti, 12, 40100 Bologna, Italy; [email protected] (G.T.); [email protected] (M.B.); [email protected] (C.R.) 5 DiSTeM, Università di Palermo, via Archirafi, 22, 90123 Palermo, Italy * Correspondence: [email protected]; Tel.: +44-114-222-7961