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

Lu, Z.; Streets, D. G.; de Foy, B.; Lamsal, L. N.; Duncan, B. N.; Xing, J.

doi:https://doi.org/10.5194/acp-15-10367-2015

Articles | Volume 15, issue 18

https://doi.org/10.5194/acp-15-10367-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue:

Ten years of Ozone Monitoring Instrument (OMI) observations...

https://doi.org/10.5194/acp-15-10367-2015

© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 15, issue 18

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, D. G. Streets, B. de Foy, L. N. Lamsal, B. N. Duncan, and J. Xing

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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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RC C4104: 'Review of Lu et al. ACPD, 15, 14961-15003, 2015:', Anonymous Referee #1, 27 Jun 2015
RC C5126: 'Review', Anonymous Referee #2, 22 Jul 2015
AC C6486: 'Responses to Comments of Both Reviewers', Zifeng Lu, 02 Sep 2015

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AR: Author's response | RR: Referee report | ED: Editor decision

AR by Zifeng Lu on behalf of the Authors (02 Sep 2015) Author's response Manuscript

ED: Publish as is (03 Sep 2015) by Natalya Kramarova

AR by Zifeng Lu on behalf of the Authors (03 Sep 2015)

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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.