Spring 2020. Streets were clear due to the COVID-19 shelter-in-place orders. The skies were clear too…or were they?  This unprecedented shift in human activity gave scientists a chance to test hypotheses about air quality in urban settings and ask questions about the contribution of various sources to pollutants, such as ozone and particulate matter, in the past, present, and future.

In her Explorer Series lecture, Dr. Kelley Barsanti will discuss her work in the Los Angeles Basin during and after the COVID-19 pandemic, as well as decadal trends in urban air quality based on long-term and historic measurements.