气候变化领域集成服务门户(CCPortal): Turbulent Wavefield Morphology and Ion Scattering in the Magnetosheath

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DOI	10.1029/2020GL089613
	Turbulent Wavefield Morphology and Ion Scattering in the Magnetosheath
	Chaston C.C.; Travnicek P.; Russell C.T.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:22
英文摘要	We analyze multipoint measurements in magnetosheath plasmas, just upstream of the Earth's magnetopause, to investigate the morphology of the turbulent fields and coincident 3-D ion distributions observed. Using interferometric and generalized wave polarization analyses, we show how the fields comprise a multiscale spectrum of Alfvénic structures composed of flow shears and vortices, and current sheets and filaments advected over the spacecraft with the magnetosheath flow. It is shown how these features are correlated with intervals of enhanced ion energy, temperature anisotropy, and impulsive variations in the agyrotropy of ion velocity space distributions. It is demonstrated that the observed variation in ion properties is inconsistent with an adiabatic response but is instead correlated with the spectral energy density of nonplanar structures at ion gyroradii scales. The capacity of these field structures to scatter ions is considered. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Morphology; Magnetosheath flow; Magnetosheath plasma; Multipoint measurement; Non-planar structures; Space distribution; Spectral energy density; Temperature anisotropy; Wave polarizations; Ions; energy budget; ion exchange; magnetopause; magnetosphere; polarization; scattering; spacecraft; three-dimensional modeling; turbulence; turbulent flow; waveform analysis
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169470
作者单位	Space Sciences Laboratory, University of California, Berkeley, CA, United States; Earth, Planetary, and Space Science, University of California, Los Angeles, CA, United States
推荐引用方式 GB/T 7714	Chaston C.C.,Travnicek P.,Russell C.T.. Turbulent Wavefield Morphology and Ion Scattering in the Magnetosheath[J],2020,47(22).
APA	Chaston C.C.,Travnicek P.,&Russell C.T..(2020).Turbulent Wavefield Morphology and Ion Scattering in the Magnetosheath.Geophysical Research Letters,47(22).
MLA	Chaston C.C.,et al."Turbulent Wavefield Morphology and Ion Scattering in the Magnetosheath".Geophysical Research Letters 47.22(2020).