Mesospheric Q2DW interactions with four migrating tides at 53<sup>◦</sup>N latitude: zonal wavenumber identification through dual‐station approaches

doi:10.1029/2020GL092237

Mesospheric winds from two longitudinal sectors at 53^◦N latitude are combined to investigate quasi‐two‐days waves (Q2DWs) and their nonlinear interactions with tides. In a summer 2019 case study, we diagnose the zonal wavenumber m of spectral peaks at expected frequencies through two dual‐station approaches, a phase differencing technique (PDT) on individual spectral peaks and a least‐squares procedure on family‐batched peaks. Consistent results from the approaches verify the occurrences of Rossby‐gravity modes (m=3 and 4 at periods T=2.1d and 1.7d), and their secondary waves (SWs) generated from interactions with diurnal, semi‐diurnal, ter‐diurnal and quatra‐diurnal migrating tides. We further extend the PDT to 2012–2019, illustrating that Q2DWs exhibit significant interannual variability. Composite analysis reveals seasonal and altitude variations of the Rossby‐gravity modes and their SWs. The Rossby‐gravity modes maximize in local summer, whereas their 16hr and 9.6hr SWs appear more in winter.

DOI	10.1029/2020GL092237
	Mesospheric Q2DW interactions with four migrating tides at 53^◦N latitude: zonal wavenumber identification through dual‐station approaches
	Maosheng He; Jeffrey M. Forbes; Guozhu Li; Christoph Jacobi; Peter Hoffmann
	2021-02-24
发表期刊	Geophysical Research Letters
出版年	2021
英文摘要	Mesospheric winds from two longitudinal sectors at 53^◦N latitude are combined to investigate quasi‐two‐days waves (Q2DWs) and their nonlinear interactions with tides. In a summer 2019 case study, we diagnose the zonal wavenumber m of spectral peaks at expected frequencies through two dual‐station approaches, a phase differencing technique (PDT) on individual spectral peaks and a least‐squares procedure on family‐batched peaks. Consistent results from the approaches verify the occurrences of Rossby‐gravity modes (m=3 and 4 at periods T=2.1d and 1.7d), and their secondary waves (SWs) generated from interactions with diurnal, semi‐diurnal, ter‐diurnal and quatra‐diurnal migrating tides. We further extend the PDT to 2012–2019, illustrating that Q2DWs exhibit significant interannual variability. Composite analysis reveals seasonal and altitude variations of the Rossby‐gravity modes and their SWs. The Rossby‐gravity modes maximize in local summer, whereas their 16hr and 9.6hr SWs appear more in winter.
领域	气候变化
URL	查看原文
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/315835
专题	气候变化
推荐引用方式 GB/T 7714	Maosheng He,Jeffrey M. Forbes,Guozhu Li,等. Mesospheric Q2DW interactions with four migrating tides at 53^◦N latitude: zonal wavenumber identification through dual‐station approaches[J]. Geophysical Research Letters,2021.
APA	Maosheng He,Jeffrey M. Forbes,Guozhu Li,Christoph Jacobi,&Peter Hoffmann.(2021).Mesospheric Q2DW interactions with four migrating tides at 53^◦N latitude: zonal wavenumber identification through dual‐station approaches.Geophysical Research Letters.
MLA	Maosheng He,et al."Mesospheric Q2DW interactions with four migrating tides at 53^◦N latitude: zonal wavenumber identification through dual‐station approaches".Geophysical Research Letters (2021).

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