First Top-Down Diurnal Updates to NOx Emissions Inventory in Asia Informed by the Geostationary Environment Monitoring Spectrometer (GEMS) Tropospheric NO2 Columns
Jincheol Park,
Yunsoo Choi,
Jia Jung
et al.
Abstract:Pioneering the use of the Geostationary Environment Monitoring Spectrometer’s (GEMS) observation data in air quality modeling, we updated Asia’s NOx emissions inventory by leveraging its unprecedented sampling frequency. GEMS tropospheric NO2 columns served as top-down constraints, guiding our Bayesian inversion to hourly update NOx emissions in Asia during spring 2022. This effectively remedied the prior underrepresentation of daytime NOx emissions, significantly improving simulation accuracy. The GEMS-inform… Show more
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