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Four-dimensional Energy Spectrum for Space–time Structure of Plasma Turbulence : Volume 21, Issue 1 (09/01/2014)

By Narita, Y.

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Book Id: WPLBN0003992188
Format Type: PDF Article :
File Size: Pages 7
Reproduction Date: 2015

Title: Four-dimensional Energy Spectrum for Space–time Structure of Plasma Turbulence : Volume 21, Issue 1 (09/01/2014)  
Author: Narita, Y.
Volume: Vol. 21, Issue 1
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Narita, Y. (2014). Four-dimensional Energy Spectrum for Space–time Structure of Plasma Turbulence : Volume 21, Issue 1 (09/01/2014). Retrieved from

Description: Space Research Institute, Austrian Academy of Sciences, Schmiedlstr. 6, 8042 Graz, Austria. A parametric model of the inertial-range energy spectrum is constructed for plasma turbulence in the four-dimensional wave vector and frequency domain. The model is based on that of the Eulerian wavenumber-frequency spectrum developed for describing fluid turbulence, and includes wave vector anisotropies in the three-dimensional wave vector domain by approximating the spectrum to a set of ellipses. The shape of the four-dimensional spectrum is determined by the Doppler shift, the Doppler broadening, and anisotropy coefficients. The model is applied to the magnetic energy spectrum in the near-Earth solar wind measured by four Cluster spacecraft, and the set of the spectral parameters are determined observationally. In this way, space–time structure of plasma turbulence can be condensed into a small number of parameters, which is suitable for evaluating the energy spectra in observational and numerical studies on the quantitative basis.

Four-dimensional energy spectrum for space–time structure of plasma turbulence

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