Global gridded NOx emissions using TROPOMI observations

This dataset provides top-down global gridded emissions of NOx for the year 2022. It is constructed from retrievals of tropospheric vertical column densities of NO2 by the TROPOMI spaceborne instrument associated with winds and atmospheric composition data from ECMWF reanalyses, using an improved version of the flux-divergence method. The emissions are provided with a spatial resolution of 0.0625°×0.0625° and deliver a detailed overview of the distribution of emissions. This dataset also provides two lists of point and diffuse sources, defined as clusters of at least 3 contiguous pixels above the value of 2 Pmolecules/cm²/h for annual averaged NOx emissions, calculated with the given monthly gridded maps. Point sources are defined as clusters comprising 3 to 9 pixels while diffuse sources are clusters with more than 10 pixels. Corrections have been applied from the previous version of the dataset; changes are generally minor, except for emissions at very high latitudes.