DOI: 10.1002/2015GL063771
论文题名: Universal properties of mirror mode turbulence in the Earth's magnetosheath
作者: Osmane A. ; Dimmock A.P. ; Pulkkinen T.I.
刊名: Geophysical Research Letters
ISSN: 0094-8710
EISSN: 1944-8441
出版年: 2015
卷: 42, 期: 9 起始页码: 3085
结束页码: 3092
语种: 英语
英文关键词: kinetic
; magnetosheath
; turbulence
Scopus关键词: Gaussian distribution
; Gaussian noise (electronic)
; Higher order statistics
; Kinetics
; Plasma shock waves
; Statistical methods
; Turbulence
; Dynamical evolution
; Kurtosis and skewness
; Magnetosheaths
; Non-Gaussian fluctuations
; Non-Gaussian statistics
; Statistical properties
; Turbulent environments
; Universal properties
; Mirrors
; Gaussian method
; kinetics
; magnetic field
; statistical analysis
; turbulence
英文摘要: We use more than 7 years of Time History of Events and Macroscale Interactions during Substorms observations to quantify the non-Gaussian properties associated with mirror mode turbulence in the Earth's magnetosheath. We find that non-Gaussian statistics of mirror modes lead to the parabolic collapse of kurtosis as the square of the skewness (K = aS2+B with a ∼ 1.3 and b ∼- 1). The parabolic scaling is a global constraint for the magnetosheath and is dictated by kinetic processes. This parabolic scaling is qualitatively independent of the distance to the magnetopause or bow shock, which implies that, even though the bow shock is driving the mirror mode instability, the dynamical evolution of mirror structures is independent of the source region and due to local processes. The parabolic relationship and coefficients between kurtosis and skewness for mirror modes in the Earth's magnetosheath are also similar to those found in a wide range of geophysical and laboratory turbulent environments, providing further evidence that turbulent systems dominated by non-Gaussian fluctuations hold universal statistical properties. Key Points Mirror modes in magnetosheath result in parabolic scaling of kurtosis-skewness Parabolic K-S collapse of mirror structures is a global magnetosheath constraint Parabolic relationship for mirror modes underlies universal turbulent properties ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930481193&doi=10.1002%2f2015GL063771&partnerID=40&md5=3b49a870c1e9d38a79923b5b181366e4
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8326
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: Department of Radio Science and Engineering, Aalto University, Espoo, Finland
Recommended Citation:
Osmane A.,Dimmock A.P.,Pulkkinen T.I.. Universal properties of mirror mode turbulence in the Earth's magnetosheath[J]. Geophysical Research Letters,2015-01-01,42(9).