Observations of thermosphere and ionosphere changes due to the dissipative 6.5-day wave in the lower thermosphere

NCUIR > College of Earth Sciences > DEPARTMENT OF SPACE SCIENCE AND ENGINEERING > journal & Dissertation > Item 987654321/102276

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/102276

Title:	Observations of thermosphere and ionosphere changes due to the dissipative 6.5-day wave in the lower thermosphere
Authors:	張起維;Gan, Q.;Yue, J.;Chang, L. C.;Wang, W. B.;Zhang, S. D.;Du, J.
Contributors:	地球科學學院太空科學與工程學系
Keywords:	Anomalies;Atmosphere;Case studies;Datasets;Equinoxes;General circulation models;Global navigation satellite system;Hemispheres;Ionosphere;Ionospheric electron content;Ionospheric electron density;Lower thermosphere;Meridional flow;Mesosphere;Momentum;Navigation;Navigation satellites;Navigation systems;Navigational satellites;Nitrogen;Planetary waves;Satellites;Satellites (Spacecraft);Seasonal variations;Thermosphere;Thermospheric composition;Total Electron Content;Wave propagation;Wind data;Zonal winds
Date:	2015-07-24
Issue Date:	2026-04-23 11:05:27 (UTC+8)
Publisher:	European Geosciences Union;Katlenburg-Lindau: Copernicus GmbH
Abstract:	摘要： Abstract. In the current work, temperature and wind data from the Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) satellite during the years 2002–2007 were used to describe the seasonal variations of the westward propagating 6.5-day planetary wave in the mesosphere and lower thermosphere (MLT). Thermospheric composition data from the TIMED satellite and ionospheric total electron content (TEC) from the International Global Navigation Satellite System (GNSS) Service were then employed to carry out two case studies on the effect of this dissipating wave on the thermosphere/ionosphere. In both cases, there were westward anomalies of ~ 30–40 m s−1 in zonal wind in the MLT region that were caused by momentum deposition of the 6.5-day wave, which had peak activity during equinoxes. The westward zonal wind anomalies led to extra poleward meridional flows in both hemispheres. Meanwhile, there were evident overall reductions of thermospheric column density O / N2 ratio and ionospheric TEC with magnitudes of up to 16–24 % during these two strong 6.5-day wave events. Based on the temporal correlation between O / N2 and TEC reductions, as well as the extra poleward meridional circulations associated with the 6.5-day waves, we conclude that the dissipative 6.5-day wave in the lower thermosphere can cause changes in the thermosphere/ionosphere via the mixing effect, similar to the quasi-two-day wave (QTDW) as predicted by Yue and Wang (2014). 出版者： Katlenburg-Lindau: Copernicus GmbH 出版日期： 2015-07-24 出處： Annales Geophysicae, 2015-07, Vol.33 (7), p.913-922 資源來源： Agricultural & Environmental Science Collection 版權： COPYRIGHT 2015 Copernicus GmbH 版權： 2015. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. 識別號： ISSN: 1432-0576 識別號： ISSN: 0992-7689 識別號： EISSN: 1432-0576 識別號： DOI: 10.5194/angeo-33-913-2015
Appears in Collections:	[DEPARTMENT OF SPACE SCIENCE AND ENGINEERING] journal & Dissertation

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	27	View/Open

社群 sharing

Loading...