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Observations of Linear and Nonlinear Processes in the Foreshock Wave Evolution : Volume 14, Issue 4 (09/07/2007)

By Narita, Y.

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Book Id: WPLBN0004019835
Format Type: PDF Article :
File Size: Pages 11
Reproduction Date: 2015

Title: Observations of Linear and Nonlinear Processes in the Foreshock Wave Evolution : Volume 14, Issue 4 (09/07/2007)  
Author: Narita, Y.
Volume: Vol. 14, Issue 4
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Fränz, M., Glassmeier, K., Nariyuki, Y., Narita, Y., & Hada, T. (2007). Observations of Linear and Nonlinear Processes in the Foreshock Wave Evolution : Volume 14, Issue 4 (09/07/2007). Retrieved from

Description: Institute of Geophysics and Extraterrestrial Physics, Technical University of Braunschweig, Mendelssohnstr. 3, 38106 Braunschweig, Germany. Waves in the foreshock region are studied on the basis of a hypothesis that the linear process first excites the waves and further wave-wave nonlinearities distribute scatter the energy of the primary waves into a number of daughter waves. To examine this wave evolution scenario, the dispersion relations, the wave number spectra of the magnetic field energy, and the dimensionless cross helicity are determined from the observations made by the four Cluster spacecraft. The results confirm that the linear process is the ion/ion right-hand resonant instability, but the wave-wave interactions are not clearly identified. We discuss various reasons why the test for the wave-wave nonlinearities fails, and conclude that the higher order statistics would provide a direct evidence for the wave coupling phenomena.

Observations of linear and nonlinear processes in the foreshock wave evolution

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