DOI: 10.1002/2017JA024162
Scopus记录号: 2-s2.0-85040665702
论文题名: Opposite Latitudinal Dependence of the Premidnight and Postmidnight Oscillations in the Electron Density of Midlatitude F Layer
作者: Chen G. ; Wang J. ; Zhang S. ; Deng Z. ; Zhong D. ; Wu C. ; Jin H. ; Li Y.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 1 起始页码: 796
结束页码: 807
语种: 英语
英文关键词: ionosonde network
; ionospheric nighttime variations
; traveling ionospheric disturbance
; westward electric field
英文摘要: The dense observation points of the oblique-incidence ionosonde network in North China make it possible to discover the ionospheric regional variations with relatively high spatial resolution. The ionosonde network and the Beijing digisonde are used to investigate the ionospheric nighttime oscillations in January and February 2011. The electron density enhancements occurring before and after midnight present the obvious opposite latitudinal dependence in the time-latitude maps, which are composed by the differential critical frequency of F2 layer. The premidnight enhancements (PRMEs) appeared earlier in the north and then moved to south. The postmidnight enhancements (POMEs) did the opposite. The data analysis shows that the PRME was a part of the large-scale traveling ionospheric disturbance (LSTID), which may be produced by gravity waves. The southward propagation of the LSTIDs is considered to form the positive latitudinal dependence of the wave peaks and troughs. The postmidnight F layer oscillation was composed by a single enhancement and a single decline following it. The westward electric field-induced E × B drift, which pushed the F layer to lower altitudes with higher recombination loss, was most likely to compress the plasma and produce the POMEs. Along with the continuously dropping of the layer, the recombination loss exceeded the density increase due to the compression effect and then the electron density decline appeared. ©2017. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114729
Appears in Collections: 气候减缓与适应
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作者单位: School of Electronic Information, Wuhan University, Wuhan, China; China Research Institute of Radiowave propagation, Qingdao, China; National Space Science Center, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Chen G.,Wang J.,Zhang S.,et al. Opposite Latitudinal Dependence of the Premidnight and Postmidnight Oscillations in the Electron Density of Midlatitude F Layer[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(1)