DOI: 10.1002/2018JD028400
Scopus记录号: 2-s2.0-85045954783
论文题名: Relations Between Semidiurnal Tidal Variants Through Diagnosing the Zonal Wavenumber Using a Phase Differencing Technique Based on Two Ground-Based Detectors
作者: He M. ; Chau J.L. ; Stober G. ; Li G. ; Ning B. ; Hoffmann P.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 8 起始页码: 4015
结束页码: 4026
语种: 英语
英文关键词: lunar semidiurnal tide (M2)
; nonlinear interaction
; phase differencing technique
; semidiurnal westward propagating modes with zonal wavenumbers 1 and 3 (SW1 and SW3)
; solar semidiurnal tide (S2)
; sudden stratospheric warming (SSW)
Scopus关键词: detection method
; periodicity
; phase transition
; planetary wave
; radar
; semidiurnal tide
; stratosphere
; upper atmosphere
; wave propagation
; zonal wind
; China
; Germany
英文摘要: The winter upper atmosphere is associated with semidiurnal tidal variants, referring collectively to enhancements of near-12 h periodicities, including the lunar tide-like (M2) periodicity, solar semidiurnal (S2) spectral sidebands, and the quasi-semidiurnal westward propagating modes with zonal wavenumbers m = 1 and 3 (qSW1 and qSW3). Here we formulate a multipoint technique and implement the technique for a configuration of two midlatitude meteor radars, from Germany and China, to investigate the tidal variants. Statistical results illustrate that the 12 h periodicity is dominated consistently by the expected migrating mode (m = 2) between 2012 and 2016, consistent with the tidal climatology and in turn validating the technique. Our case study of 2013 sudden stratospheric warming reveals that the 11.6 h periodicity is characterized by m = 3, whereas the 12.4 h periodicity is dominated by m = 2 mode with a maximum amplitude 7.5 m/s and also comprises an additional mode m = 1 with a maximum amplitude 3.3 m/s. These observational evidences demonstrate, explicitly and for the first time, that (1) two independently reported categories of the variants, namely, the sidebands and the qSW1/qSW3 enhancements, are two different perspectives of identical phenomena, namely, the secondary waves of nonlinear interactions between SW2 and planetary waves, and (2) while M2 and the qSW1-associated secondary wave are entangled in the 12.4 h periodicity, M2 is superior to the sideband. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114068
Appears in Collections: 气候减缓与适应
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作者单位: Leibniz Institute of Atmospheric Physics at the Rostock University, Kühlungsborn, Germany; Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
He M.,Chau J.L.,Stober G.,et al. Relations Between Semidiurnal Tidal Variants Through Diagnosing the Zonal Wavenumber Using a Phase Differencing Technique Based on Two Ground-Based Detectors[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(8)