Quasiperiodic Rising Structures in the E-F Valley Region Below the Equatorial Plasma Bubble: A Numerical Study

doi:10.1029/2019JA026620

	Quasiperiodic Rising Structures in the E-F Valley Region Below the Equatorial Plasma Bubble: A Numerical Study
	Savio, S.; Sousasantos, J.; Pimenta, A. A.; Yang, G.; Kherani, E. A.; Wang, C.; Liu, Z.
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2019
卷号	124 期号:8 页码:7247-7255
关键词	Numerical simulation Equatorial plasma irregularities Equatorial QuasiPeriodic echoes
ISSN号	2169-9380
DOI	10.1029/2019JA026620
英文摘要	This paper presents a numerical study aiming to understand the generating mechanism of poorly studied equatorial plasma irregularities known as equatorial quasiperiodic echoes. Employing a two-dimensional model of the collisional interchange instability, the simulations are able to reproduce the spatial periodic features of this kind of irregular structures. The usage of an instability seeding source considering an overlap of two gravity waves with different wavelengths was capable to produce such quasiperiodic structures. The results suggest that the penetration of the equatorial plasma bubble fringe fields in typical altitudes of the valley region may be the physical mechanism responsible for the structures. Additionally, the simulation results indicate that the lower wavelength gravity wave dominates over the quasiperiodic nature of the these irregularities. The simulations results present considerable agreement with radar and in situ measurements of these quasiperiodic structures.
语种	英语
内容类型	期刊论文
源URL	[http://ir.nssc.ac.cn/handle/122/7199]
专题	国家空间科学中心_空间科学部
推荐引用方式 GB/T 7714	Savio, S.,Sousasantos, J.,Pimenta, A. A.,et al. Quasiperiodic Rising Structures in the E-F Valley Region Below the Equatorial Plasma Bubble: A Numerical Study[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2019,124(8):7247-7255.
APA	Savio, S..,Sousasantos, J..,Pimenta, A. A..,Yang, G..,Kherani, E. A..,...&Liu, Z..(2019).Quasiperiodic Rising Structures in the E-F Valley Region Below the Equatorial Plasma Bubble: A Numerical Study.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,124(8),7247-7255.
MLA	Savio, S.,et al."Quasiperiodic Rising Structures in the E-F Valley Region Below the Equatorial Plasma Bubble: A Numerical Study".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 124.8(2019):7247-7255.