Articles | Volume 19, issue 6
Atmos. Chem. Phys., 19, 3769–3777, 2019

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

Atmos. Chem. Phys., 19, 3769–3777, 2019
Research article
25 Mar 2019
Research article | 25 Mar 2019

Photochemistry on the bottom side of the mesospheric Na layer

Tao Yuan et al.

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Cited articles

Brasseur, G. P. and Solomon, S.: Aeronomy of the Middle Atmosphere: Chemistry and Physics of the Stratosphere and Mesosphere, Springer, New York, 2005. 
Carrillo-Sánchez, J. D., Nesvorný, D., Pokorný, P., Janches, D., and Plane, J. M. C.: Sources of cosmic dust in the Earth's atmosphere, Geophys. Res. Lett., 43, 11979–11986,, 2016. 
Chen, H., White, M. A., Krueger, D. A., and She, C. Y.: Daytime mesopause temperature measurements using a sodium-vapor dispersive Faraday filter in lidar receiver, Opt. Lett., 21, 1003–1005, 1996. 
Clemesha, D. M., Batista, P. P., and Simonich, D. M.: Tide-induced oscillations in the atmospheric sodium layer, J. Atmos. Sol.-Terr. Phys., 64, 1321–1325, 2002. 
Cox, R. M., Self, D. E., and Plane, J. M. C.: A study of the reaction between NaHCO3 and H: apparent closure on the neutral chemistry of sodium in the upper mesosphere, J. Geophys. Res., 106, 1733–1739, 2001. 
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.
Final-revised paper