Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2406.05848 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866917877102149632 |
|---|---|
| author | He, Maosheng Forbes, Jeffrey M. Stober, Gunter Jacobi, Christoph Li, Guozhu Liu, Libo Xu, Jiyao |
| author_facet | He, Maosheng Forbes, Jeffrey M. Stober, Gunter Jacobi, Christoph Li, Guozhu Liu, Libo Xu, Jiyao |
| contents | Nine years of mesospheric wind data from two meteor radars at 52°N latitude were analyzed to investigate planetary waves (PWs) and tides by estimating their zonal wavenumber through longitudinal phase differences. Our results reveal that PW normal modes (NMs) primarily drive multi-day oscillations, showing seasonal variability and statistical associations with Sudden Stratospheric Warming (SSW) events. Specifically, a significant 6-day NM emerges in April, followed by predominant 4- and 2-day NMs until June, with peaks of 2-, 4-, and 6-day NMs spanning July to October. Furthermore, our study provides the first observational verification of frequency and zonal wavenumber of over ten secondary waves from nonlinear interactions among planetary-scale waves. One notable finding is the prevalence of non-migrating components in winter 24-hour and summer 8-hour tides, attributed to these nonlinear interactions. Our findings underscore the diverse nonlinear dynamics of planetary-scale waves, triggering a variety of periodic oscillations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2406_05848 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Nonlinear Interactions of Planetary-Scale Waves in Mesospheric Winds Observed at 52°N Latitude and Two Longitudes He, Maosheng Forbes, Jeffrey M. Stober, Gunter Jacobi, Christoph Li, Guozhu Liu, Libo Xu, Jiyao Space Physics Nine years of mesospheric wind data from two meteor radars at 52°N latitude were analyzed to investigate planetary waves (PWs) and tides by estimating their zonal wavenumber through longitudinal phase differences. Our results reveal that PW normal modes (NMs) primarily drive multi-day oscillations, showing seasonal variability and statistical associations with Sudden Stratospheric Warming (SSW) events. Specifically, a significant 6-day NM emerges in April, followed by predominant 4- and 2-day NMs until June, with peaks of 2-, 4-, and 6-day NMs spanning July to October. Furthermore, our study provides the first observational verification of frequency and zonal wavenumber of over ten secondary waves from nonlinear interactions among planetary-scale waves. One notable finding is the prevalence of non-migrating components in winter 24-hour and summer 8-hour tides, attributed to these nonlinear interactions. Our findings underscore the diverse nonlinear dynamics of planetary-scale waves, triggering a variety of periodic oscillations. |
| title | Nonlinear Interactions of Planetary-Scale Waves in Mesospheric Winds Observed at 52°N Latitude and Two Longitudes |
| topic | Space Physics |
| url | https://arxiv.org/abs/2406.05848 |