Sodium lidar observed quasi-two-day wave in sodium density and temperature

Tao Li; Chiao-Yao She

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Sodium lidar observed quasi-two-day wave in sodium density and temperature

Tao Li 1 * #,Chiao-Yao She 2

1.Department of Geophysics and Planetary Science, University of Science and Technology of China, Hefei, Anhui, 230026

2.Department of Physics, Colorado State University, Fort Collins, Colorado, 80523

*Correspondence author

#Submitted by

Subject:

Funding: National Natural Science Foundation of China grants （No.NO. 40974084, NO. 41074108）, National Science Foundation grant （No.NO. ATM-0545221）

Opened online:28 December 2012

Accepted by: none

Citation: Tao Li,Chiao-Yao She.Sodium lidar observed quasi-two-day wave in sodium density and temperature[OL]. [28 December 2012] http://en.paper.edu.cn/en_releasepaper/content/4501560

Three 80-90 hour sodium lidar campaigns during the month of August in three consecutive years, 2002, 2003, and 2004 were analyzed to investigate the correlations of the response of sodium density to quasi-two day (QTD) wave with temperature perturbations. We found that the QTD wave amplitudes of sodium density and temperature are correlated remarkably well in most of altitudes from 80-100km. However, the sodium density QTD wave perturbation is in phase with temperature QTD wave perturbation below the height of mean sodium density peak, and out of phase above. The maximum wave amplitudes of sodium density and temperature are correlated very well with the peaks of the vertical gradient of mean sodium density mixing ratio. These observations may suggest, for the first time, that the response of sodium density to tides and QTD wave perturbation is likely not just dominated by dynamic effects of vertical advection.

Keywords:Mesosphere; Na density; temperature; Quasi-Two-Day wave

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