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Severe ozone in counties adjacent to the Great Lakes shorelines, particularly Lake Michigan, is a longstanding air quality challenge. The lake breeze is present during a majority of the days with high ozone, with steep ozone gradients along the lakeshore and concentration of pollutants in a shallow layer. Ground site assets are in place overlapping CUPiDS science flights to study complex interactions between lake boundary layers, lake breezes and urban emissions. These assets include Pandora and AERONET long term monitoring sites, and the ANL urban integrated field laboratory for Community Research on Climate and Urban Science (CROCUS).
