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Earth, Planets and Space

, Volume 57, Issue 5, pp 393–398 | Cite as

The terdiurnal tide in the mesosphere and lower thermosphere over Wuhan (30°N, 114°E)

  • Guangxin ZhaoEmail author
  • Libo Liu
  • Baiqi Ning
  • Weixing Wan
  • Jiangang Xiong
Open Access
Research News

Abstract

Winds measured by an all-sky meteor radar have been used to investigate the terdiurnal tide in the mesosphere and lower thermosphere (MLT) region overWuhan (30.6°N, 114.4°E). We present a climatology of the terdiurnal tide at low-mid latitude site during the period of April 2002 to December 2004. The terdiurnal peak is distinct in the long-term power spectrum of the wind. The monthly and seasonal mean maximum amplitudes have values of 7 m/s and 5 m/s, respectively. The short-term amplitudes can occasionally reach up to 30 m/s, and at times the terdiurnal tide is as large as the diurnal and semidiurnal ones. It seems that the meridional component is more regular than the zonal one. An obvious annual variation is observed in the meridional phases with a phase leading in winter than that in summer. The annual variation for the terdiurnal tidal amplitude is not obvious, and is variable from year to year in our observations. This seasonal trend is slightly different from earlier studies at other locations.

Key words

Meteor radar terdiurnal tide mesospheric dynamics nonlinear interaction 

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Copyright information

© The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences. 2005

Authors and Affiliations

  • Guangxin Zhao
    • 1
    • 2
    • 3
    Email author
  • Libo Liu
    • 1
  • Baiqi Ning
    • 1
  • Weixing Wan
    • 1
  • Jiangang Xiong
    • 1
  1. 1.Institute of Geology and GeophysicsChinese Academy of SciencesBeijingChina
  2. 2.Wuhan Institute of Physics and MathematicsChinese Academy of SciencesWuhanChina
  3. 3.Graduate School of the Chinese Academy of SciencesChina

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