Urban Air Quality in a Changing Climate

Climate change influences wild-fire intensity and frequency, biogenic emissions, and large-scale meteorology (blocking, stagnation events). Each of these can contribute to poor urban air quality. Future urban (and downwind) air quality exceedances are more likely to be influenced by long-range transport of wild-fire smoke. Multi-scale coupled modeling frameworks, improved wild-fire emissions estimates, and chemical data assimilation will be needed to improve predictions of these coupled urban/wild-fire pollution events. This talk illustrates the complexity of predicting urban air quality in the presence if wild-fire emissions during a case study during July, 2023 using both high resolution regional air quality predictions and global chemical and aerosol data assimilation experiments.