Impact of the interaction between the quasi-2 day wave and tides on the ionosphere and thermosphere

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Title:	Impact of the interaction between the quasi-2 day wave and tides on the ionosphere and thermosphere
Authors:	張起維;Yue, Jia;Wang, Wenbin;Ruan, Haibing;Chang, Loren C.;Lei, Jiuhou
Contributors:	地球科學學院太空科學與工程學系
Keywords:	dynamo;ionosphere;quasi‐2 day wave;tides
Date:	2016-04-01
Issue Date:	2026-04-23 11:04:13 (UTC+8)
Publisher:	Wiley-Blackwell
Abstract:	摘要： The quasi‐2 day wave (QTDW) can effectively interact with atmospheric tides in the mesosphere and lower thermosphere. We study the effect of this QTDW‐tidal interaction on the ionosphere and thermosphere using the thermosphere‐ionosphere‐mesosphere electrodynamics general circulation model. This interaction reduces the amplitude of the migrating diurnal tide in the lower thermosphere by ~10 m/s in neutral winds and also generates sum and difference secondary waves in the lower thermosphere and E region ionosphere. As a result of the changed migrating diurnal tide and sum/difference secondary wave, vertical ion drift varies with local time at different longitudes by ~5 m/s. In addition, the changed migrating diurnal tide also modulates the thermospheric composition (O/N2). During a QTDW event, the ionosphere F2 region peak electron density (NmF2) is reduced due to the mixing effect of the QTDW dissipation; NmF2 also shows changes in local time variation due to the QTDW‐tidal interaction. The sum and difference secondary waves can cause additional oscillations in vertical ion drift and ionospheric electron densities. The QTDW‐tidal interaction is another mechanism by which the QTDW impacts the ionosphere and thermosphere, along with other mechanisms: QTDW modulation of the E region wind dynamo with a period of quasi‐2 days and QTDW dissipation induced mixing in the thermosphere. Key Points The QTDW can effectively interact with atmospheric tides in the mesosphere and lower thermosphere The changed tides induce variations in vertical ion drift and electron density Sum and difference secondary waves cause oscillations in the ionosphere 出版日期： 2016-04 出處： Journal of geophysical research : Space physics (2013 - Present), 2016-04, Vol.121 (4), p.3555-3563 資源來源： Wiley Online Library All Journals 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: 10.1002/2016JA022444
Appears in Collections:	[DEPARTMENT OF SPACE SCIENCE AND ENGINEERING] journal & Dissertation

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