Top-down NOx emissions of european cities based on the downwind plume of modelled and space-borne tropospheric NO2 columns

Willem W. Verstraeten*, Klaas Folkert Boersma, John Douros, Jason E. Williams, Henk Eskes, Fei Liu, Steffen Beirle, Andy Delcloo

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

9 Citations (Scopus)

Abstract

Top-down estimates of surface NOX emissions were derived for 23 European cities based on the downwind plume decay of tropospheric nitrogen dioxide (NO2) columns from the LOTOS-EUROS (Long Term Ozone Simulation-European Ozone Simulation) chemistry transport model (CTM) and from Ozone Monitoring Instrument (OMI) satellite retrievals, averaged for the summertime period (April–September) during 2013. Here we show that the top-down NOX emissions derived from LOTOS-EUROS for European urban areas agree well with the bottom-up NOX emissions from the MACC-III inventory data (R2 = 0.88) driving the CTM demonstrating the potential of this method. OMI top-down NOX emissions over the 23 European cities are generally lower compared with the MACC-III emissions and their correlation is slightly lower (R2 = 0.79). The uncertainty on the derived NO2 lifetimes and NOX emissions are on average ~55% for OMI and ~63% for LOTOS-EUROS data. The downwind NO2 plume method applied on both LOTOS-EUROS and OMI tropospheric NO2 columns allows to estimate NOX emissions from urban areas, demonstrating that this is a useful method for real-time updates of urban NOX emissions with reasonable accuracy.

Original languageEnglish
Article number2893
JournalSensors (Switzerland)
Volume18
Issue number9
DOIs
Publication statusPublished - 31 Aug 2018

Keywords

  • LOTOS-EUROS CTM
  • OMI data
  • Surface NO emissions
  • Tropospheric NO column

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