Fig. 1: Surface warming trends at the urban core across the world.
From: Surface warming in global cities is substantially more rapid than in rural background areas

Map of daytime trend (a), map of nighttime trend (c), and global mean trend in daytime (b), and nighttime surface UHI intensity (d). The two boxed regions in a, c are enlarged as e, f for daytime and g, h for nighttime. Note that the error bars represent 10%~90% percentiles.