Validation of Horizontal RO3QET Lidar Measurements Using Various In-Situ Instrumentation

Abstract:

The TEMPO (Tropospheric Emissions Monitoring Pollution) UV-visible spectrometer will be launched as part of a global GEO constellation for air quality monitoring. The TOLNet (Tropospheric Ozone Lidar Network) scientist, will perform validation projects to assess the quality of the TEMPO instrument. Comparisons of the RO₃QET (Rocket City Ozone Quality Evaluation in the Troposphere) scanning lidar in conjunction with in-situ measurements not only quantifies the ozone spatially and temporally but validates the lidar range of measurements horizontally in the troposphere. This paper will present the validation of the RO₃QET horizontal ozone measurements from the 289-299 scanning lidar profiles using in-situ 2B 205 instruments, 2B POM (Personal Ozone Monitor), and in-line tethered balloon measurements. The accomplishment of this task included analyzing surface and horizontal lidar measurements made from approximately 2-20 meters above ground level (AGL) with a range between 0.7 and 8 km, depending on how the actual surface elevation changes. Observations in the Huntsville, AL metropolitan area, incorporated multiple land-use changes including, greenspace, residential, and a significantly traveled thoroughfare, on a one-kilometer 360-degree radial of the lidar. We demonstrate that measuring ozone in the horizontal plane is a new measurement technique that will provide the scientific community with important satellite validation of tropospheric variables.