Impact of 1.5 K global warming on urban air pollution and heat island with outlook on human health effects

Projected regional climate change modifies the circulation and the radiation effects, which influence urban air pollution (UAP) and urban heat island (UHI) properties. Besides the primary effects of climate change on these urban stressors, the human health effects are also reviewed. The change is derived from the average 4.5 W m(-2) radiation increment version of the Representative Concentration Pathways (RCP4.5) scenario for 2046-2065, which was characterized by 1.4 K global warming and maps for temperature, precipitation, air pressure and cloudiness changes maps. Regions with more anticyclonic and cloudless weather and increased temperature would definitely suffer from stronger UAP and UHI even if 1.5 K becomes the peak warming. Since, the other regional changes are fairly linear in function of the global warming (except precipitation), the smaller the warming, the more tolerable the targeted urban climate stresses are.