1 1 2 3 4 Reassessment and update of long-term trends in downward surface 5 shortwave radiation over Europe (1939-2012) 6 7 A. Sanchez-Lorenzo 1,2 , M. Wild 3 , M. Brunetti 4 , J.A. Guijarro 5 , M. Hakuba 3 , J. Calbó 2 , 8 S. Mystakidis 3 , B. Bartok 3,6 9 (1) Instituto Pirenaico de Ecología, Consejo Superior de Investigaciones Científicas (IPE–CSIC), 10 Zaragoza, Spain 11 (2) Department of Physics, University of Girona, Girona, Spain 12 (3) ETH Zurich, Institute for Atmospheric and Climate Science, Zürich, Switzerland 13 (4) Institute of Atmospheric Sciences and Climate, Italian National Research Council, Italy 14 (5) State Meteorological Agency (AEMET), Palma de Mallorca, Spain 15 (6) University of Babes-Bolyai, Department of Geography, Cluj-Napoca, Romania 16 17 18 19 Corresponding author: 20 Arturo Sanchez-Lorenzo 21 Pyrenean Institute of Ecology (IPE) 22 Spanish National Research Council (CSIC) 23 Av. Montañana 1005 24 50059 Zaragoza (Spain) 25 Email: arturo.sanchez@ipe.csic 26