Stationary planetary wave and nonmigrating tidal signatures in ionospheric wave 3 and wave 4 variations in 2007-2011 FORMOSAT-3/COSMIC observations

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題名:	Stationary planetary wave and nonmigrating tidal signatures in ionospheric wave 3 and wave 4 variations in 2007-2011 FORMOSAT-3/COSMIC observations
作者:	張起維;Chang, Loren C.;Lin, Chien-Hung;Yue, Jia;Liu, Jann-Yenq;Lin, Jia-Ting
貢獻者:	地球科學學院太空科學與工程學系
關鍵詞:	Amplitudes;Astronomy;COSMIC;Earth, ocean, space;Exact sciences and technology;External geophysics;Interplanetary space;Ionization;Ionosphere;Ionospherics;Meteorology;Physics of the ionosphere;Physics of the magnetosphere;planetary wave;Planetary waves;Seasonal variations;Signatures;Solar activity;Solar system;Tides;wave-3;wave-4
日期:	2013-01-01
上傳時間:	2026-04-23 11:06:09 (UTC+8)
出版者:	Wiley-Blackwell;Hoboken, NJ: Blackwell Publishing Ltd
摘要:	摘要： The wave 3 and wave 4 modulations of the Equatorial Ionization Anomalies are a robust feature of the low‐latitude ionosphere, when viewed at constant local time. Although initially associated, respectively, with DE2 and DE3, nonmigrating diurnal tides in the mesosphere and lower thermosphere region, recent results have suggested that the wave 3 and wave 4 may also have significant contributions from other tidal and stationary planetary wave (SPW) signatures. We present observations of total electron content (TEC) variations associated with tidal and SPW signatures comprising the ionospheric wave 3 and wave 4 structures from FORMOSAT‐3/COSMIC from 2007 to 2011. We find that the wave 3 (wave 4) feature is comprised predominately by DE2 (DE3) and SPW3 (SPW4) signatures in TEC throughout all 5 years, with contributions from SE1 (SE2) being less significant. The wave 3 component also has recurring contributions from DW4 during December/January. The absolute amplitudes of all the aforementioned tidal and SPW signatures are directly related to the level of solar activity and the semiannual variation in zonal mean TEC. After normalizing by the zonal mean, the relative amplitudes of the wave 4 signatures are inversely related to solar activity through 2010, which is not seen with the wave 3‐related signatures. The seasonal variation and phases of the main constituents of wave 3 and wave 4 are consistent from year to year, as evidenced by the interannual recurrence in the peak and trough locations of wave 3 and wave 4. 其他題名： J. Geophys. Res. Space Physics 出版者： Hoboken, NJ: Blackwell Publishing Ltd 出版日期： 2013-10 出處： Journal of Geophysical Research: Space Physics, 2013-10, Vol.118 (10), p.6651-6665 資源來源： Wiley Online Library 版權： 2013. American Geophysical Union. All Rights Reserved. 版權： 2015 INIST-CNRS 識別號： ISSN: 2169-9380 識別號： ISSN: 2169-9402 識別號： EISSN: 2169-9402 識別號： DOI: 10.1002/jgra.50583
顯示於類別:	[太空科學與工程學系] 期刊論文

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