期刊
SENSORS
卷 18, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/s18092893
关键词
tropospheric NO2 column; surface NOX emissions; OMI data; LOTOS-EUROS CTM
资金
- Netherlands Organization for Scientific Research, NWO Vidi grant [864.09.001]
- EU FP7 Project Quality Assurance for Essential Climate Variables (QA4ECV) [607405]
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 (R-2 = 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 (R-2 = 0.79). The uncertainty on the derived NO2 lifetimes and NOX emissions are on average similar to 55% for OMI and similar to 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.
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