Figure 3From: The trend of natural illuminance levels in 14 Chinese cities in the past 50 yearsMann-Kendall mutation test of annual total illuminance in typical Chinese light-climate regions. (a) Beijing and Erenhot, (b) Changchun and Guangzhou, (c) Urumchi and Heihe, (d) Xi'an and Xining, (e) Kunming and Changsha, (f) Shanghai and Chongqing, and (g) Fuzhou and Yushu.Back to article page