Studies modelling climate change impacts on air quality find that the spatiotemporal patterns of concentration changes vary strongly at urban scales, and that often those patterns differ among the different years modelled due to internal variability  and different models used . Changes in PM2.5 due to climate change are less clear than for ozone and may be relatively smaller  as climate change can affect PM2.5 species differently . For Beijing, climate change is expected to cause a 50% increase in the frequency of meteorological conditions conducive to high PM2.5 concentrations . The impacts of future climate change on air quality and consequent risks on human health have been studied at urban  and national scales ; globally, these studies have found a likely net increased risk of climate change on air pollution-related health . They have focused mainly on the USA and Europe, with few studies elsewhere , although the relationship between climate and air quality in megacities is particularly complex . Silva et al.  found that global premature mortality attributable to climate change  from ozone and PM2.5 will increase by about 260,000 deaths per year in 2100 under RCP8.5, but substantial variance in results exists between individual models.
IPCC
Climate Change 2022: Impacts, Adaptation and Vulnerability
IPCC Report