Estimates of power plant NOx emissions and lifetimes from OMI NO2 satellite retrievals

摘要: Isolated power plants with well characterized emissions serve as an ideal test case of methods to estimate using satellite data. In this study we evaluate the Exponentially-Modified Gaussian (EMG) method and box model based on mass balance for estimating known NOx from retrievals made by Ozone Monitoring Instrument (OMI). We consider 29 in USA which have large plumes that do not overlap other sources data Continuous Emission System (CEMS). This enables us identify constraints required methods, such wind use how calculate background values. found lifetimes estimated are too short be representative chemical lifetime. Instead, introduce a separate lifetime parameter account discrepancy between estimates real those theory would predict. terms emissions, EMG averages multiple years give accurate results, whereas gave results individual ozone seasons.