Observational evidence of ionospheric migrating tide modification during the 2009 stratospheric sudden warming

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題名:	Observational evidence of ionospheric migrating tide modification during the 2009 stratospheric sudden warming
作者:	劉正彥;Lin, J. T.;Lin, C. H.;Chang, L. C.;Huang, H. H.;Liu, J. Y.;Chen, A. B.;Chen, C. H.;Liu, C. H.
貢獻者:	地球科學學院太空科學與工程學系
關鍵詞:	Accounting;Atmospheric sciences;Diurnal variations;Drivers;Earth sciences;Earth, ocean, space;Exact sciences and technology;Geophysics;Ionospheric electron density;ionospheric migrating tides;Ionospherics;Latitude;Signatures;stratospheric sudden warning;Tidal analysis;Tides
日期:	2012-01-01
上傳時間:	2026-04-23 11:05:22 (UTC+8)
出版者:	Wiley-Blackwell;Washington, DC: Blackwell Publishing Ltd
摘要:	摘要： In this paper, modifications of the ionospheric tidal signatures during the 2009 stratospheric sudden warming (SSW) event are studied by applying atmospheric tidal analysis to ionospheric electron densities observed using radio occultation soundings of FORMOSAT‐3/COSMIC. The tidal analysis indicates that the zonal mean and major migrating tidal components (DW1, SW2 and TW3) decrease around the time of the SSW, with 1.5–4 hour time shifts in the daily time of maximum around EIA and middle latitudes. The typical ionospheric SSW signature: a semi‐diurnal variation of the ionospheric electron density, featuring an earlier commencement and subsidence of EIA, can be reproduced by differencing the migrating tides before and during the SSW period. Our results also indicate that the migrating tides represent ∼80% of the ionospheric tidal components at specific longitudes, suggesting that modifications of the migrating tides may be the major driver for producing ionospheric changes observed during SSW events, accounting for greater variability than the nonmigrating tides that have been the focus of previous studies. 其他題名： Geophys. Res. Lett 出版者： Washington, DC: Blackwell Publishing Ltd 出版日期： 2012-01 出處： Geophysical Research Letters, 2012-01, Vol.39 (2), p.n/a 資源來源： Wiley Online Journals ** 版權： Copyright 2012 by the American Geophysical Union 版權： 2015 INIST-CNRS 版權： Copyright 2012 by American Geophysical Union 識別號： ISSN: 0094-8276 識別號： ISSN: 1944-8007 識別號： EISSN: 1944-8007 識別號： DOI: 10.1029/2011GL050248 識別號： CODEN: GPRLAJ
顯示於類別:	[太空科學與工程學系] 期刊論文

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