Ozonesonde Measurements from North Shore Long Island Region During Summer 2018-2019 LISTOS Field Campaign

The Long Island Sound Tropospheric Ozone Study (LISTOS) is a multi-organization collaborative study focusing on Long Island Sound and surrounding coastlines that continue to suffer from poor air quality exacerbated by land/water circulations. To investigate the evolving nature of ozone formation and transport in the NYC region and downwind Long Island Sound, electrochemical ozonesondes were launched from the Long Island locations of Flax Pond Marine Laboratory in Old Field (2018) and the DEC Regional Office in Stony Brook (2019) to measure vertical profiles of ozone. Using HYSPLIT back trajectories and Mesonet Doppler Lidars, land-water interactions such as sea breeze were studied for the production, distribution and transport of ozone in the NYC and Long Island Sound region. High ozone event days in 2018 and 2019 are presented as a case study. Comparison results from two summer seasons are also presented.