Geostationary satellites, including the Geostationary Environment Monitoring
Spectrometer (GEMS) over Asia and the Tropospheric Emissions: Monitoring of Pollution
(TEMPO) over North America, are revolutionizing air quality monitoring with high-resolution,
continuous observations of atmospheric pollutants, enabling unprecedented insights into regional
and global air quality dynamics. These capabilities enable detailed studies of diurnal variations,
emission sources, and pollutant transport. This presentation discusses the integration of GEMS
and TEMPO data with airborne measurements from NASA’s STAQS (Synergistic TEMPO Air
Quality Science) and ASIA-AQ (Airborne and Satellite Investigation of Asian Air Quality) field
campaigns. These campaigns provide essential in-situ and remote-sensing data to validate
satellite retrievals, refine air quality models, and deepen understanding of chemical processes,
atmospheric dynamics, and emission sources. Short-term airborne measurements offer a unique,
multidimensional view of trace gases and aerosols, providing vertically resolved, chemically
comprehensive data on pollutant distribution. This is critical for linking satellite observations
with surface measurements and evaluating air quality models used to predict and diagnose poor
air quality conditions. Through these efforts, STAQS and ASIA-AQ enhance the characterization
of local emissions, aid in source identification, and improve understanding of secondary ozone
and fine particle formation. These contributions refine air quality models and improve the
interpretation of satellite and ground-based data