Climate data shown in figure 2. The columns present 1) site name, 2) country (CH = Swizerland, IT = Italy), 3) site elevation, 3) site longitude, 4) site latitude, 5) mean July temperature, 6) standard deviation of July temperature, 7) annual precipitation, 8) standard deviation of annual precipitation. Temperature and precipitation for study sites in Switzerland was obtained from interpolated climate station data (1961-1990; Thornton et al. 1997; data source: Swiss Federal Institute for Forest, Snow, and Landscape Research WSL). For study sites in Italy, temperatures were obtained from the nearest weather station (1961-1990; Desiato et al. 2007; data source: SCIA System). Data for Monticchio were obtained from ENEA (Italian National Agency for New Technologies, Energy and Sustainable Development).