Fig. 9

Temperature box plots for canopy (green) and ground (red-brown) for January, 2017. Thermal scans are for solar noon restricted to the symmetrical − 40° to 40° view azimuth range. The boxplot markers denote the 2nd, 25th, 50th, 75th and 98th percentiles. The − 32.5° elevation scan angle was used. Clearness index values for each day are in the grey text (values between 0 and 1), calculated as the ratio of shortwave radiation observed to a theoretical clear sky flux. Low clearness index values denote cloudy days