Evaluating TEMPO NO2 over the New York City Metropolitan Area during CUPiDS

The Tropospheric Emissions: Monitoring of Pollution (TEMPO) satellite was launched in April 2023 by NASA and has been measuring tropospheric trace gases with hourly time resolution over North America since August 2023. The geostationary orbit of TEMPO poses advantages and also some new challenges to satellite validation efforts (e.g., due to changes in geometry, stratospheric correction, and the spatial scales of sampling) that remain understudied. Overlapping with TEMPO’s early measurement phase, the University of Colorado Airborne Multi-Axis Differential Optical Absorption Spectroscopy (CU AMAX-DOAS) instrument was deployed to probe tropospheric NO2 and other trace gas columns during research flights over New York City, NY conducted as part of the Coastal Urban Plume Dynamics Study (CUPiDS) from July 15 to August 15, 2023. CU AMAX-DOAS is co-deployed with a NOAA Doppler lidar, two 4-channel radiometers (surface albedo), and in situ measurements onboard the NOAA Twin Otter aircraft, with the objectives to better understand emissions and meteorology as drivers for air quality in coastal Metropolitan areas. This presentation focuses on the inter-comparison of tropospheric NO2 trace gas columns from TEMPO and AMAX-DOAS remote sensing measurements.