DOI: 10.1029/2018JA025242
Scopus记录号: 2-s2.0-85052387059
论文题名: Ionospheric Tidal Waves Observed From Global Ionosphere Maps: Analysis of Total Electron Content
作者: Jhuang H.K. ; Tsai T.C. ; Lee L.C. ; Ho Y.Y.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 8 起始页码: 6776
结束页码: 6797
语种: 英语
英文关键词: global ionospheric maps
; hyperbolic secant squared fitting
; ionospheric tidal waves
英文摘要: The monthly, seasonal, yearly, and latitudinal variations of ionosphere tidal waves are studied based on the total electron content (TEC) data from global ionosphere maps. We use two-dimensional (longitudinal, −180°E to 180°E; and time, 10 days) Fourier transform of TEC variations along different latitude to obtain all wave modes for the period from 18 November 2002 to 15 October 2014. The wave modes can be classified as westward propagating (eastward propagating and standing) waves with 85.8–97.3% (2.3–10.0% and 0.4–4.2%) of total power. The wave modes are found to consist of migrating waves with power 75–94% and nonmigrating waves with 5.8–25%. The migrating waves are dominated by diurnal migrating tide (DW1, 69.9–89.4%), semidiurnal migrating tide (SW2, 0.5–4.3%), and terdiurnal migrating tide (TW3, 0.2–1.9%). Also, the total wave power and powers of DW1 and SW2 peak along magnetic latitude 10°N and decrease with increasing magnetic latitude. The power of TW3 peaks along the magnetic equator and decreases with increasing magnetic latitude. We also found that the wave powers of DW1 and SW2 obtained from TEC data are very similar to the wave powers obtained from the ionospheric density with a profile of sech2 solitary wave. The observed migrating amplitudes are stronger in equinoxes and weaker in solstices. For the nonmigrating tides, we simultaneously identify the wave modes and wave powers, which contribute to wave-1, wave-2, wave-3, wave-4, and wave-5 peak structures in the local time frame. The total wave power associated with TEC variations increases with solar activity (sun spot number). ©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/113381
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Institute of Earth Science, Academia Sinica, Taipei, Taiwan; National Center for High-Performance Computing, National Applied Research Laboratories, Hsinchu, Taiwan; Institute of Space Science, National Central University, Jhongli, Taiwan
Recommended Citation:
Jhuang H.K.,Tsai T.C.,Lee L.C.,et al. Ionospheric Tidal Waves Observed From Global Ionosphere Maps: Analysis of Total Electron Content[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(8)