Fig. 3
From: Declining urban density attenuates rising population exposure to surface heat extremes
The relationship between the contribution from intra-city population distribution to extreme surface heat exposure, \(\Delta (SUHI_{P} - SUHI_{A} )\), and the changes in urban population density (\(\Delta \rho_{N}\)). Bubble colors from light to dark red represent the population densities (\(\rho_{N}\)), and bubble sizes represent city sizes (N) in 2020. The blue line is the linear regression of all cities using the least-square method. Blue diamonds and error bars show the binned averages and standard deviations of \(\Delta (SUHI_{P} - SUHI_{A} )\), where the number of bins is 30. Four black text boxes show the total numbers of cities (#cities) and their combined population (POP) within each quadrant.
