An Overview of the Fires, Asian, and Stratospheric Transport-Las Vegas Ozone Study (FAST-LVOS)

The Fires, Asian, and Stratospheric Transport-Las Vegas Ozone Study (FAST-LVOS) was conducted in Southern Nevada and California over a 6-week period from May 17 to June 30, 2017. The primary goal of the study was to assess the impact of transport from outside sources including wildfires, Asian pollution, and stratospheric intrusions, on surface O₃ in Clark County, NV during late spring and early summer. The study combined ground-based lidar, aircraft, ozonesonde, and in situ measurements, and was funded by the Clark County (NV) Department of Air Quality with additional support from NOAA and the NASA-sponsored Tropospheric Ozone Lidar Network (TOLNet). The 45-day field campaign produced more than 500 hours of O₃ and aerosol backscatter lidar profiles and continuous Doppler lidar measurements of mixed layer heights and vertical velocities at the North Las Vegas Airport (NLVA), with nearly continuous in situ sampling of O₃, CO, CO₂, CH₄, N₂O, NO, NO₂, and NOy at the summit of Angel Peak in the nearby Spring Mountains. These measurements were augmented by ozonesonde launches on 12 days, and by aircraft profiles of O₃, NO₂, CH₄, and CO₂ above southern Nevada and California on 16 days. In this talk, I will describe the FAST-LVOS campaign and present a summary of the measurements and preliminary findings.