Fig. 1
From: Declining urban density attenuates rising population exposure to surface heat extremes
Trend in yearly warm season surface urban heat island (SUHI) maximum from 2003 to 2020. (a) the aggregate time series of average surface heat extremes (\(SUHI_{A}\), blue) and the population exposure them (weighted by population, \(SUHI_{P}\), red) in 1,000 global cities. The global values of \(SUHI_{A}\) and \(SUHI_{P}\) are aggregated as the weighted means of all cities, where the weights are their population sizes. (b) The distribution of population growth across cities with different trends of population-weighted surface urban heat island (\(\Delta SUHI_{P}\)), in different regions. In East Asia & Pacific, South Asia, and Sub-Saharan Africa, the population has grown more in cities with positive trends; while in the rest of the world, population growth was evenly distributed among cities with both positive and negative trends. (c) The map of \(\Delta SUHI_{P}\) in global cities.
