DOI: 10.1002/2014GL062019
论文题名: Morphology of the postsunset vortex in the equatorial ionospheric plasma drift
作者: Lee W.K. ; Kil H. ; Kwak Y.-S. ; Paxton L.J.
刊名: Geophysical Research Letters
ISSN: 0094-9076
EISSN: 1944-8807
出版年: 2015
卷: 42, 期: 1 起始页码: 9
结束页码: 14
语种: 英语
英文关键词: equatorial ionosphere
; equatorial spread F
; postsunset vortex
; zonal plasma drift
; zonal shear flow
Scopus关键词: Backscattering
; Ionosphere
; Ionospheric measurement
; Morphology
; Radar
; Shear flow
; Equatorial ionosphere
; Equatorial spread F
; Incoherent scatter radar
; Ionospheric plasmas
; Prereversal enhancement
; Turbulent regions
; Typical morphology
; Zonal plasma drifts
; Vortex flow
; altitude
; backscatter
; electrodynamics
; equatorial wave
; ionosphere
; magnetic field
; turbulence
; vortex flow
; Jicamarca
; Lima [Peru]
; Peru
; Peru
英文摘要: The postsunset vortex in the equatorial ionosphere exhibits clockwise plasma motions after sunset in longitude (time) and altitude coordinates when the equatorial ionosphere is viewed looking northward. We describe the typical morphology of the postsunset vortex using incoherent scatter radar observations at Jicamarca in Peru during the previous solar maximum (2000-2002). A pronounced vortical plasma motion appears around 1700 LT along with the onset of the prereversal enhancement (PRE). The center of this vortex is located near an altitude of 270 km. A smaller-scale vortex also appears about 0.5 ~ 1 h later at higher altitudes. However, the morphology and occurrence time of this small vortex depend on the characteristics of the coherent backscatter region. We find that the earlier vortex is the major feature of the postsunset vortices because it is repeatable, associated with the PRE, and independent to the occurrence of the coherent backscatter region. Key Points Postsunset vortex develops with the onset of the prereversal enhancement The upper part of postsunset vortex is interrupted by turbulence Vortical motions in turbulent regions do not represent the postsunset vortex ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921738698&doi=10.1002%2f2014GL062019&partnerID=40&md5=cb17641740d5067eb09d3254eb782c34
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8692
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Korea Astronomy and Space Science Institute, Daejeon, South Korea
Recommended Citation:
Lee W.K.,Kil H.,Kwak Y.-S.,et al. Morphology of the postsunset vortex in the equatorial ionospheric plasma drift[J]. Geophysical Research Letters,2015-01-01,42(1).