Articles | Volume 21, issue 5
Atmos. Chem. Phys., 21, 4007–4023, 2021
https://doi.org/10.5194/acp-21-4007-2021
Atmos. Chem. Phys., 21, 4007–4023, 2021
https://doi.org/10.5194/acp-21-4007-2021

Research article 17 Mar 2021

Research article | 17 Mar 2021

A comparison of long-term trends in observations and emission inventories of NOx

Elena Macdonald et al.

Data sets

Download of air quality data – E1a and E2a data European Environment Agency (EEA) https://discomap.eea.europa.eu/map/fme/AirQualityExport.htm

Gridded NOx data EMEP Centre on Emission Inventories and Projections https://www.ceip.at/the-emep-grid/gridded-emissions/nox

Model code and software

Code for A Comparison of Long-term Trends in Observations and Emission Inventories of NOx E. Macdonald https://doi.org/10.5281/zenodo.4604890

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Short summary
NO2 limit values are still regularly exceeded in many European cities despite decreasing emissions. Measurements of NOx concentrations from stations across Europe were systematically analysed to assess long-term changes observed in urban areas. We compared trends in concentration increments to trends in total and traffic emissions to find potential discrepancies. The results can help in evaluating inaccuracies in emission inventories and in improving spatial imbalances in data availability.
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