DOI: 10.1029/2018JA025179
Scopus记录号: 2-s2.0-85050621135
论文题名: Kinetic-Scale Ion Flux Fluctuations Behind the Quasi-Parallel and Quasi-Perpendicular Bow Shock
作者: Rakhmanova L. ; Riazantseva M. ; Zastenker G. ; Verigin M.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期: 7 起始页码: 5300
结束页码: 5314
语种: 英语
英文关键词: magnetosheath
; space plasma
; turbulence
英文摘要: Properties of kinetic-scale plasma turbulence are examined observationally with the help of Spektr-R measurements in the Earth's magnetosheath. The statistics covers 6 years of ion flux measurements during years 2011–2017 and includes a few dozens of the magnetosheath crossings with total duration of 250 hr. Several types of Fourier spectra are distinguished in the magnetosheath according to a spectral shape at the scales of transition from magnetohydrodynamic to kinetic regimes. Spectral indices and occurrence rate of different spectral shapes are examined at different locations with respect to the magnetosheath boundaries—the magnetopause and the bow shock. Magnetosheath plasma behind the quasi-parallel and quasi-perpendicular bow shock is explored separately. Clear dynamics of spectral shapes across the magnetosheath is shown: spectra with broad bump at the transition frequencies occur more frequently in the vicinity of the bow shock, while spectra with plateau at the same frequencies are usually observed closer to the magnetopause. Spectral indices such as spectral slope at the kinetic scales and break frequency are shown to be weakly affected by the boundaries behind the quasi-perpendicular bow shock. The steepest spectra are observed close to the quasi-parallel bow shock. ©2018. 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/113629
Appears in Collections: 气候减缓与适应
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作者单位: Space Research Institute, Russian Academy of Sciences, Moscow, Russian Federation
Recommended Citation:
Rakhmanova L.,Riazantseva M.,Zastenker G.,et al. Kinetic-Scale Ion Flux Fluctuations Behind the Quasi-Parallel and Quasi-Perpendicular Bow Shock[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(7)