Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018GL077510 |
Dependence of Lunar Tide of the Equatorial Electrojet on the Wintertime Polar Vortex, Solar Flux, and QBO | |
Siddiqui, T. A.1,2; Yamazaki, Y.2; Stolle, C.2,3; Luehr, H.2; Matzka, J.2; Maute, A.1; Pedatella, N.1 | |
2018-05-16 | |
发表期刊 | GEOPHYSICAL RESEARCH LETTERS |
ISSN | 0094-8276 |
EISSN | 1944-8007 |
出版年 | 2018 |
卷号 | 45期号:9页码:3801-3810 |
文章类型 | Article |
语种 | 英语 |
国家 | USA; Germany |
英文摘要 | The lower atmospheric forcing effects on the ionosphere are particularly evident during extreme meteorological events known as sudden stratospheric warmings (SSWs). During SSWs, the polar stratosphere and ionosphere, two distant atmospheric regions, are coupled through the SSW-induced modulation of atmospheric migrating and nonmigrating tides. The changes in the migrating semidiurnal solar and lunar tides are the major source of ionospheric variabilities during SSWs. In this study, we use 55 years of ground-magnetometer observations to investigate the composite characteristics of the lunar tide of the equatorial electrojet (EEJ) during SSWs. These long-term observations allow us to capture the EEJ lunar tidal response to the SSWs in a statistical sense. Further, we examine the influence of solar flux conditions and the phases of quasi-biennial oscillation (QBO) on the lunar tide and find that the QBO phases and solar flux conditions modulate the EEJ lunar tidal response during SSWs in a similar way as they modulate the wintertime Arctic polar vortex. This work provides first evidence of modulation of the EEJ lunar tide due to QBO. Plain Language Summary This study focuses on the vertical coupling between the polar stratosphere and equatorial ionosphere during sudden stratospheric warmings (SSWs). Extreme meteorological events such as SSWs induce variabilities in the ionosphere by modulating the atmospheric migrating and nonmigrating tides, and these variabilities can be comparable to a moderate geomagnetic storm. Observations and modeling studies have found that the changes in the migrating semidiurnal solar and lunar tides are a major source of ionospheric variabilities during SSWs. The equatorial electrojet (EEJ) is a narrow ribbon of current flowing over the dip equator in the ionosphere and is particularly sensitive to tidal changes. Long-term ground-magnetometer recordings have been used in this study to estimate the variations induced in EEJ during SSWs due to the lunar semidiurnal tide in a statistical sense. The wintertime Arctic polar vortex and the occurrence of SSWs are modulated by solar flux conditions and the phases of quasi-biennial oscillation. In this work, we find the first evidence of lunar tidal modulation of EEJ due to quasi-biennial oscillation during SSWs. Our findings will be useful in providing improved predictions of ionospheric variations due to SSWs. The aeronomy community will be the most impacted by this paper. |
英文关键词 | lunar tide equatorial electrojet vertical coupling SSW QBO planetary waves |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000434111700006 |
WOS关键词 | STRATOSPHERIC SUDDEN WARMINGS ; QUASI-BIENNIAL OSCILLATION ; SUNSPOTS ; CYCLE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/26348 |
专题 | 气候变化 |
作者单位 | 1.Natl Ctr Atmospher Res, High Altitude Observ, Pob 3000, Boulder, CO 80307 USA; 2.GFZ German Res Ctr Geosci, Potsdam, Germany; 3.Univ Potsdam, Fac Sci, Potsdam, Germany |
推荐引用方式 GB/T 7714 | Siddiqui, T. A.,Yamazaki, Y.,Stolle, C.,et al. Dependence of Lunar Tide of the Equatorial Electrojet on the Wintertime Polar Vortex, Solar Flux, and QBO[J]. GEOPHYSICAL RESEARCH LETTERS,2018,45(9):3801-3810. |
APA | Siddiqui, T. A..,Yamazaki, Y..,Stolle, C..,Luehr, H..,Matzka, J..,...&Pedatella, N..(2018).Dependence of Lunar Tide of the Equatorial Electrojet on the Wintertime Polar Vortex, Solar Flux, and QBO.GEOPHYSICAL RESEARCH LETTERS,45(9),3801-3810. |
MLA | Siddiqui, T. A.,et al."Dependence of Lunar Tide of the Equatorial Electrojet on the Wintertime Polar Vortex, Solar Flux, and QBO".GEOPHYSICAL RESEARCH LETTERS 45.9(2018):3801-3810. |
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