Ozone in the troposphere is controlled by stratospheric-tropospheric exchange (STE) and in-situ production which depends on the concentration of precursors such as the nitrogen oxides NOX. Due to the short tropospheric lifetime of NOX, its global distribution strongly corresponds to the distribution of emissions. We want to quantify the relative contributions and the geographic distributions of individual NOX emission sources using a variety of satellite data. Nitrogen dioxide NO2 measured by the GOME satellite has been compared to night-time light emissions observed from space. These light emissions can serve as a proxy for emissions of NOX from fossil fuel combustion. It turns out that the light density at the earth’s surface shows a better correlation with tropospheric NO2 measured by GOME than the estimated anthropogenic emissions in the EDGAR database which are widely used in global chemistry models. Recently satellite datasets of global lightning flash frequencies (LIS/OTD) and fire counts (ATSR) became available. With the satellite datasets of light density, lightning intensity, fire counts, and NO2 column density we hope to improve the current knowledge of nitrogen oxide emissions.
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- Use of GOME Measurements for the Examination of the Nitrogen Oxide Budget in the Troposphere
- Springer Berlin Heidelberg