Interannual variability of ammonia concentrations over the United States:
sources and implications

Schiferl, Luke D.; Heald, Colette L.; Van Damme, Martin; Clarisse, Lieven; Clerbaux, Cathy; Coheur, Pierre-François; Nowak, John B.; Neuman, J. Andrew; Herndon, Scott C.; Roscioli, Joseph R.; Eilerman, Scott J.

doi:https://doi.org/10.5194/acp-16-12305-2016

Articles | Volume 16, issue 18

https://doi.org/10.5194/acp-16-12305-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/acp-16-12305-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 16, issue 18

Research article

|

29 Sep 2016

Research article |

| 29 Sep 2016

Interannual variability of ammonia concentrations over the United States: sources and implications

Luke D. Schiferl, Colette L. Heald, Martin Van Damme, Lieven Clarisse, Cathy Clerbaux, Pierre-François Coheur, John B. Nowak, J. Andrew Neuman, Scott C. Herndon, Joseph R. Roscioli, and Scott J. Eilerman

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Final revised paper (published on 29 Sep 2016)
Supplement to the final revised paper
Preprint (discussion started on 18 Apr 2016)

Interactive discussion

Status: closed

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

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- Supplement

RC1: 'Simulating ammonia concentrations and assessing their variability', Anonymous Referee #1, 28 Jun 2016
- AC1: 'Response to Referee 1', Luke Schiferl, 12 Sep 2016
RC2: 'Review of Interannual Variability of Ammonia Concentrations over the United States: Sources and Implications', Anonymous Referee #2, 18 Jul 2016
- AC2: 'Response to Referee 2', Luke Schiferl, 12 Sep 2016

Peer-review completion

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

AR by Luke Schiferl on behalf of the Authors (12 Sep 2016) Author's response Manuscript

ED: Publish as is (14 Sep 2016) by Robert Harley

AR by Luke Schiferl on behalf of the Authors (14 Sep 2016)

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Short summary

This study combines new observations and a simulation to assess the interannual variability of atmospheric ammonia concentrations over the United States. The model generally underrepresents the observed variability. Nearly two-thirds of the simulated variability is caused by meteorology, twice that caused by regulations on fossil fuel combustion emissions. Adding ammonia emissions variability does not substantially improve the simulation and has little impact on summer particle concentrations.