Numerical simulation of the 6 day wave effects on the ionosphere: Dynamo modulation

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题名:	Numerical simulation of the 6 day wave effects on the ionosphere: Dynamo modulation
作者:	張起維;Gan, Quan;Wang, Wenbing;Yue, Jia;Liu, Hanli;Chang, Loren C.;Zhang, Shaodong;Burns, Alan;Du, Jian
贡献者:	地球科學學院太空科學與工程學系
关键词:	5 day wave;6.5 day wave;6 day wave;coupling;dynamo;ionosphere
日期:	2016-10-01
上传时间:	2026-04-23 11:05:15 (UTC+8)
出版者:	Wiley-Blackwell;American Geophysical Union (AGU)
摘要:	摘要： AbstractThe Thermosphere‐Ionosphere‐Mesosphere Electrodynamics General Circulation Model (TIME‐GCM) is used to theoretically study the 6 day wave effects on the ionosphere. By introducing a 6 day perturbation with zonal wave number 1 at the model lower boundary, the TIME‐GCM reasonably reproduces the 6 day wave in temperature and horizontal winds in the mesosphere and lower thermosphere region during the vernal equinox. The E region wind dynamo exhibits a prominent 6 day oscillation that is directly modulated by the 6 day wave. Meanwhile, significant local time variability (diurnal and semidiurnal) is also seen in wind dynamo as a result of altered tides due to the nonlinear interaction between the 6 day wave and migrating tides. More importantly, the perturbations in the E region neutral winds (both the 6 day oscillation and tidal‐induced short‐term variability) modulate the polarization electric fields, thus leading to the perturbations in vertical ion drifts and ionospheric F2 region peak electron density (NmF2). Our modeling work shows that the 6 day wave couples with the ionosphere via both the direct neutral wind modulation and the interaction with atmospheric tides. 出版者： American Geophysical Union (AGU) 出版日期： 2016-10 出處： Journal of Geophysical Research: Space Physics, 2016-10, Vol.121 (10), p.10,103-10,116 資源來源： Wiley Online Library All Journals (Post Cancellation Access) 版權： 2016. American Geophysical Union. All Rights Reserved. 識別號： ISSN: 2169-9380 識別號： ISSN: 2169-9402 識別號： EISSN: 2169-9402 識別號： DOI: 10.1002/2016ja022907
显示于类别:	[太空科學與工程學系] 期刊論文

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