DOI: 10.1002/jgrd.50872
论文题名: Nonlinear coupling between quasi 2 day wave and tides based on meteor radar observations at Maui
作者: Huang K.M. ; Liu A.Z. ; Lu X. ; Li Z. ; Gan Q. ; Gong Y. ; Huang C.M. ; Yi F. ; Zhang S.D.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 19 起始页码: 10936
结束页码: 10943
语种: 英语
英文关键词: nonlinear coupling
; QTDW
; tides
Scopus关键词: Drops
; Radar measurement
; Background winds
; Bispectrum analysis
; Maximum amplitude
; Nonlinear coupling
; Nonlinear interactions
; Observational study
; QTDW
; Short-term variations
; Tides
; amplitude
; meteor
; nonlinearity
; radar imagery
; seasonal variation
; tidal modeling
; Hawaii [United States]
; Hawaiian Islands
; Maui
; United States
英文摘要: An observational study of nonlinear interaction between the quasi 2 day wave (QTDW) and the diurnal and semidiurnal tides from meteor radar measurements at Maui is reported. The diurnal and semidiurnal tides show a short-term variation with the QTDW activity. The variation of amplitude of the semidiurnal tide is opposite to that of the QTDW. The minimum amplitudes of the diurnal tide appear several days later than the maximum amplitudes of the QTDW, and the diurnal tide obviously strengthens when the QTDW drops to small amplitudes. The bispectrum analysis shows significant nonlinear interactions among the QDTW and the tidal components. The two quasi 16 h modes with periods of 16.2 h and 15.8 h generated in the interactions of the QTDW with the diurnal and semidiurnal tides can clearly be distinguished because of the slight deviation of the QTDW period from 48 h. The bicoherence spectrum demonstrates that the QTDW and the semidiurnal tide have quite strong levels of coherence, indicating that the nonlinear interaction is a mechanism responsible for the variability of the semidiurnal tide. Although there is also some interaction between the QTDW and the diurnal tide, their coherence level is low. When the QTDW drops to very weak amplitudes, the background wind decreases and reverses. During this time, the diurnal tide holds large amplitudes. These results support the notion that the variability of the diurnal tide is mainly attributable to the strong QTDW-induced changes in the background atmosphere, which was shown in the modeling study by Chang et al. (2011). Hence, both the nonlinear interaction and the background flow changes are responsible for the observed variation of the diurnal tide. Key Points Significant interactions among QDTW and tides occur simultaneously Interaction is responsible for variability of SDT due to large coupling degree Two mechanisms are responsible for observed variability of DT ©2013. American Geophysical Union. All Rights Reserved. 资助项目: 41074110
; 41174133
; 41221003
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63280
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: School of Electronic Information, Wuhan University, Wuhan, 430079, China; Department of Physical Science, Embry-Riddle Aeronautical University, Daytona Beach FL, United States; Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan, China; State Observatory for Atmospheric Remote Sensing, Wuhan, China
Recommended Citation:
Huang K.M.,Liu A.Z.,Lu X.,et al. Nonlinear coupling between quasi 2 day wave and tides based on meteor radar observations at Maui[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(19)