Research Projects

The ETL ground-based ozone lidar was deployed in August 1995 near one of the major ozone transport corridors from the Los Angles Air Basin to the Mojave Desert. A newly developed two-dimensional scanning system was added to the modified and ruggedized lidar system. The scanning system provides the capability of showing horizontal inhomogeneity. Scanning data also serve as strong internal check of the lidar system itself, and that is a great advantage. The afternoon data on most days show a layer of higher ozone concentrations in the lower boundary layer, and another layer aloft. The two layers merge in mid afternoon but separate again later. Advection ozone fluxes are calculated using lidar profiles and wind profiler data. The results show more ozone is transported aloft, although higher ozone concentrations may exist in the lower altitude.