Photochemistry on the bottom side of the mesospheric Na layer

Yuan, Tao; Feng, Wuhu; Plane, John M. C.; Marsh, Daniel R.

doi:https://doi.org/10.5194/acp-19-3769-2019

Articles | Volume 19, issue 6

https://doi.org/10.5194/acp-19-3769-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Layered phenomena in the mesopause region (ACP/AMT inter-journal...

https://doi.org/10.5194/acp-19-3769-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 6

Research article

|

25 Mar 2019

Research article |

| 25 Mar 2019

Photochemistry on the bottom side of the mesospheric Na layer

Tao Yuan, Wuhu Feng, John M. C. Plane, and Daniel R. Marsh

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Final revised paper (published on 25 Mar 2019)
Preprint (discussion started on 27 Nov 2018)

Interactive discussion

Status: closed

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

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- Supplement

RC1: 'reviewer comments', Anonymous Referee #1, 14 Dec 2018
RC2: 'Review of the manuscript', Anonymous Referee #2, 19 Dec 2018
- AC2: 'reply to review', Tao Yuan, 21 Jan 2019
AC1: 'reply to review', Tao Yuan, 21 Jan 2019

Peer-review completion

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

AR by Tao Yuan on behalf of the Authors (06 Feb 2019) Author's response Manuscript

ED: Publish subject to minor revisions (review by editor) (11 Mar 2019) by William Ward

AR by Tao Yuan on behalf of the Authors (12 Mar 2019) Author's response Manuscript

ED: Publish as is (15 Mar 2019) by William Ward

AR by Tao Yuan on behalf of the Authors (16 Mar 2019) Manuscript

Short summary

The Na layer in the upper atmosphere is very sensitive to solar radiation and varies considerably during sunrise and sunset. In this paper, we use the lidar observations and an advanced model to investigate this process. We found that the variation is mostly due to the changes in several photochemical reactions involving Na compounds, especially NaHCO₃. We also reveal that the Fe layer in the same region changes more quickly than the Na layer due to a faster reaction rate of FeOH to sunlight.