DOI: 10.1002/2015GL066369
论文题名: First detection of the supersonic upward plasma flow structures in the early morning sector
作者: Astafyeva E. ; Zakharenkova I.
刊名: Geophysical Research Letters
ISSN: 0094-8383
EISSN: 1944-8114
出版年: 2015
卷: 42, 期: 22 起始页码: 9642
结束页码: 9649
语种: 英语
英文关键词: DMSP
; ionospheric irregularities
; plasma bubbles
; supersonic flow
; upward plasma drift
Scopus关键词: Geomagnetism
; Ionosphere
; Ionospheric measurement
; Storms
; Supersonic flow
; DMSP
; Interplanetary electric fields
; Interplanetary magnetic fields
; Ionospheric irregularities
; Penetration electric field
; Plasma bubble
; Plasma drifts
; Plasma irregularities
; Electric fields
; bubble
; detection method
; drift behavior
; electric field
; equatorial dynamics
; flow field
; geomagnetic storm
; ionosphere
; magnetic field
; new record
; plasma
; satellite data
; updraft
; velocity profile
; Pacific Ocean
英文摘要: We present the first observations of the supersonic updrafting plasma drifts in the predawn sector. Two DMSP satellites quasi-simultaneously detected two fast-speed events: one of ~385 km spatial extension and with the maximum upward velocity of 1683 m/s appeared at ~3 LT, and the other of ~1500 km large with maximum speed of 1770 m/s occurred at ~5 LT. Both supersonic structures were observed above the eastern Pacific region, separated by ~35° of longitude in space and by 45 min in time. The events occurred at the recovery phase of the geomagnetic storm of 19 February 2014, during rapid oscillations of the interplanetary magnetic field Bz and the interplanetary electric field Ey components, which increased the eastward electric field in the equatorial nighttime ionosphere and triggered the generation of plasma irregularities. The storm time penetration electric fields seem to be the principal driver of the observed supersonic events. Key Points First observations of the supersonic upward drift in the early morning sector Two supersonic events were detected quasi-simultaneously over the eastern Pacific Such events are extremely rare to occur in the early morning sector. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956941387&doi=10.1002%2f2015GL066369&partnerID=40&md5=af5fe60ca723a527722b52e163758b5f
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7999
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: Institut de Physique du Globe de Paris, UMR CNRS 7154, Paris VII - Denis Diderot University, Paris Sorbonne Cité, Paris, France
Recommended Citation:
Astafyeva E.,Zakharenkova I.. First detection of the supersonic upward plasma flow structures in the early morning sector[J]. Geophysical Research Letters,2015-01-01,42(22).