Origin of oxidized mercury in the summertime free troposphere over the southeastern US

Shah, V.; Jaeglé, L.; Gratz, L. E.; Ambrose, J. L.; Jaffe, D. A.; Selin, N. E.; Song, S.; Campos, T. L.; Flocke, F. M.; Reeves, M.; Stechman, D.; Stell, M.; Festa, J.; Stutz, J.; Weinheimer, A. J.; Knapp, D. J.; Montzka, D. D.; Tyndall, G. S.; Apel, E. C.; Hornbrook, R. S.; Hills, A. J.; Riemer, D. D.; Blake, N. J.; Cantrell, C. A.; Mauldin III, R. L.

doi:https://doi.org/10.5194/acp-16-1511-2016

Articles | Volume 16, issue 3

https://doi.org/10.5194/acp-16-1511-2016

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

https://doi.org/10.5194/acp-16-1511-2016

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

Articles | Volume 16, issue 3

Research article

|

10 Feb 2016

Research article |

| 10 Feb 2016

Origin of oxidized mercury in the summertime free troposphere over the southeastern US

V. Shah, L. Jaeglé, L. E. Gratz, J. L. Ambrose, D. A. Jaffe, N. E. Selin, S. Song, T. L. Campos, F. M. Flocke, M. Reeves, D. Stechman, M. Stell, J. Festa, J. Stutz, A. J. Weinheimer, D. J. Knapp, D. D. Montzka, G. S. Tyndall, E. C. Apel, R. S. Hornbrook, A. J. Hills, D. D. Riemer, N. J. Blake, C. A. Cantrell, and R. L. Mauldin III

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Final revised paper (published on 10 Feb 2016)
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Preprint (discussion started on 05 Oct 2015)
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Interactive discussion

Status: closed

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

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RC C8679: 'Referee comment', Anonymous Referee #1, 29 Oct 2015
- AC C11399: 'Response to referee comments', Viral Shah, 12 Jan 2016
RC C10392: 'Referee Comment', Anonymous Referee #2, 14 Dec 2015

Peer-review completion

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

AR by Viral Shah on behalf of the Authors (12 Jan 2016) Author's response Manuscript

ED: Publish as is (15 Jan 2016) by Ashu Dastoor

AR by Viral Shah on behalf of the Authors (18 Jan 2016)

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Short summary

We present airborne observations of mercury over the southeastern USA during summer. Higher concentrations of oxidized mercury were observed in clean, dry air masses descending in the subtropical anti-cyclones. We used an atmospheric model to simulate the chemistry and transport of mercury. We found reasonable agreement with the observations when the modeled oxidation of elemental mercury was increased, suggesting fast cycling between elemental and oxidized mercury.