Comparing OMI-based and EPA AQS in situ NO2 trends: towards understanding surface NOx emission changes

Zhang, Ruixiong; Wang, Yuhang; Smeltzer, Charles; Qu, Hang; Koshak, William; Boersma, K. Folkert

doi:https://doi.org/10.5194/amt-11-3955-2018

Articles | Volume 11, issue 7

https://doi.org/10.5194/amt-11-3955-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/amt-11-3955-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 11, issue 7

Research article

|

06 Jul 2018

Research article |

| 06 Jul 2018

Comparing OMI-based and EPA AQS in situ NO₂ trends: towards understanding surface NO_x emission changes

Ruixiong Zhang, Yuhang Wang, Charles Smeltzer, Hang Qu, William Koshak, and K. Folkert Boersma

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Final revised paper (published on 06 Jul 2018)
Supplement to the final revised paper
Preprint (discussion started on 25 Jan 2018)
Supplement to the preprint

Interactive discussion

Status: closed

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

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- Supplement

SC1: 'Some ideas to improve paper...', Michael Barkley, 02 Feb 2018
- AC1: 'Response to Dr. Barkley', Ruixiong Zhang, 06 Mar 2018
RC1: 'Review of “Reconciling the differences between OMI-based and EPA AQS in situ NO2 trends” by Zhang et al.', Anonymous Referee #1, 24 Mar 2018
- AC2: 'Response to Referee #1', Ruixiong Zhang, 26 Apr 2018
RC2: 'Review of amt-2017-410', Anonymous Referee #2, 31 Mar 2018
- AC3: 'Response to Referee #2', Ruixiong Zhang, 26 Apr 2018

Peer-review completion

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

AR by Ruixiong Zhang on behalf of the Authors (26 Apr 2018) Author's response Manuscript

ED: Referee Nomination & Report Request started (26 Apr 2018) by Andreas Richter

RR by Anonymous Referee #1 (11 May 2018)

RR by Anonymous Referee #2 (26 May 2018)

ED: Reconsider after major revisions (28 May 2018) by Andreas Richter

AR by Ruixiong Zhang on behalf of the Authors (22 Jun 2018) Author's response Manuscript

ED: Publish subject to technical corrections (26 Jun 2018) by Andreas Richter

AR by Ruixiong Zhang on behalf of the Authors (27 Jun 2018) Manuscript

Short summary

This study focuses on how to improve OMI NO₂ retrievals for trend analysis. We retrieve OMI tropospheric NO₂ vertical column densities (VCDs) and obtain the NO₂ seasonal trends over the United States, which are compared with coincident in situ surface NO₂ measurements from the Air Quality System network. We find that three procedures are essential in comparing both datasets, including the ocean trend removal, the albedo update, and the lightning filter.