Articles | Volume 15, issue 18
Atmos. Chem. Phys., 15, 10367–10383, 2015
https://doi.org/10.5194/acp-15-10367-2015

Special issue: Ten years of Ozone Monitoring Instrument (OMI) observations...

Atmos. Chem. Phys., 15, 10367–10383, 2015
https://doi.org/10.5194/acp-15-10367-2015

Research article 21 Sep 2015

Research article | 21 Sep 2015

Emissions of nitrogen oxides from US urban areas: estimation from Ozone Monitoring Instrument retrievals for 2005–2014

Z. Lu et al.

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Short summary
Using an exponentially modified Gaussian method and taking into account the effect of wind on NO2 distributions, we estimate 3-year moving-average emissions of summertime NOx from 35 US urban areas directly from NO2 retrievals of the OMI during 2005−2014. Total OMI-derived NOx emissions over US urban areas decreased by 49%, consistent with reductions of 43, 49, and 44% in the bottom-up NOx emissions, the weak-wind OMI NO2 burdens, and the averaged NO2 concentrations, respectively.
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