2018/2019 LISTOS
The Long Island Sound Tropospheric Ozone Study (LISTOS) is a multi-agency collaborative study focusing on Long Island Sound and the surrounding coastlines that continue to suffer from poor air quality exacerbated by land/water circulations. The primary measurement operations are planned between June-September 2018/2019 and include, but not limited to, in situ and remotely sensing instrumentation integrated aboard three aircrafts, a network of ground sites, mobile vehicle and boat measurements.
Highlighted Results: Several papers were published related to the 2018/2019 LISTOS study, highlighting (1) the extreme spatial heterogeneity of O3 in Long Island (Zhang et al., 2020, JGRA); (2) the heatwave and marine breeze related enhanced aerosol event (Zhang et al., 2021, EP); and (3) the response of SOA to emission controls comparing the 2018 LISTOS results to the previsous ones.
Zhang et al., Mobile laboratory measurements of high surface ozone levels and spatial heterogeneity during LISTOS 2018: Evidence for sea‐breeze influence. Journal of Geophysical Research: Atmospheres, 2020. https://doi.org/10.1029/2019JD031961
Extremely high ozone with dramatic spatial heterogeneity was observed over the south side of Long Island. This high level of heterogeneity in surface ozone, and more importantly in total oxidants was unexpected during the LISTOS study, and it would have gone unnoticed if not for the mobile laboratory deployment and measurements. This prompted the set-up of a new special air quality monitoring site in Heckscher State Park on the south shore of Long Island
Zhang, et al., Long Island enhanced aerosol event during 2018 LISTOS: Association with heatwave and marine influences. Environmental Pollution, 2021. https://doi.org/10.1016/j.envpol.2020.116299
Aerosol mass growth was observed and explained during a Long Island summer heatwave.
Less-oxidized oxygenated organic aerosol was formed from anthropogenic sources.
Aged marine influenced aerosol transported inland was internally mixed.
35% of sulfate during selected periods resulted from methanesulfonic acid (MSA).
Zhang et al., The response of summertime organic aerosol composition to emission controls in the northeastern United States. Journal of Geophysical Research: Atmospheres, 2022. https://doi.org/10.1029/2022JD037056
Local formed secondary organic aerosols (SOA) nighttime extremes reflect the reduction of anthropogenic volatile organic compounds.
These fresh SOA extremes occurred most often under high relative humidity during nighttime.
A flat multiyear trend is observed for the regional-aged SOA.
The regional aged SOA is becoming increasingly decoupled from highly oxidized particle sulfate.
