A nonlinear simulation of the thermal diurnal tide

Deng Hua Wu, S. Miyahara, Yasunobu Miyoshi

研究成果: Contribution to journalArticle査読

21 被引用数 (Scopus)

抄録

A simplified middle atmosphere general circulation model is used to investigate the nonlinear behavior of the thermal diurnal tidal waves. In the model, only a westward moving diurnal tide generated by heating with zonal wavenumber 1 is considered. The tidal wave propagation is simulated by a full nonlinear calculation with a convective adjustment scheme and a Richardson number dependent vertical eddy diffusion. The numerical results show that the growth of the diurnal tide due to the density stratification is effectively suppressed and a relatively constant amplitude distribution with height is realized by the convective adjustment in the lower thermosphere. It is also shown that mean zonal winds and mean meridional circulations are induced by the diurnal tidal waves in the region where the tidal waves are breaking by convective instability, in accordance with the wave-mean flow interaction theorem.

本文言語英語
ページ(範囲)1017-1030
ページ数14
ジャーナルJournal of Atmospheric and Terrestrial Physics
51
11-12
DOI
出版ステータス出版済み - 1 1 1989

All Science Journal Classification (ASJC) codes

  • 環境科学(全般)
  • 地球物理学
  • 工学(全般)
  • 大気科学
  • 地球惑星科学(全般)

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