Articles | Volume 18, issue 16
Atmos. Chem. Phys., 18, 11683–11695, 2018
https://doi.org/10.5194/acp-18-11683-2018

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

Atmos. Chem. Phys., 18, 11683–11695, 2018
https://doi.org/10.5194/acp-18-11683-2018

Research article 17 Aug 2018

Research article | 17 Aug 2018

Climatology of mesopause region nocturnal temperature, zonal wind and sodium density observed by sodium lidar over Hefei, China (32° N, 117° E)

Tao Li et al.

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Latest update: 16 Oct 2021
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Short summary
A total of 154 nights of observations by the USTC Na temperature and wind lidar (32° N, 117° E) suggest significant seasonal variability in the mesopause. Chemistry plays an important role in Na atom formation. More than half of the observed gravity wave (GW) momentum flux (MF), whose divergence determines the GW forcing, is induced by short-period (10 min–2 h) waves. The anticorrelation between MF and zonal wind (U) suggests strong filtering of short-period GWs by semiannual oscillation U.
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