Figure 2.

Two groups of cities emerge based on the size distributions of heat islets at incremental thermal thresholds. Two representative cities for each group - Jakarta, Indonesia, and Lagos, Nigeria for dense cities, and Chicago, USA, and Guangzhou, China for sprawling cities - are shown. (a,b) Land Surface Temperature map (in °C), (c,d) Heat islets that emerge at the 90^th percentile thermal threshold, (e,f) Exceedance probability plots for heat islets at several thermal thresholds (50^th, …, 90^th). Note the leftward shift in size distribution as the thresholds increase, especially the exponential tempering evident in sprawling cities, (g,h) Largest islet size, and (i,j) sum of remaining islets (as a % of total city area), as a function of thermal threshold. The vertical dashed colored lines mark the temperatures corresponding to the percentiles used in (e,f).