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Stasiewicz et al. 2000
Stasiewicz, K., Khotyaintsev, Y., Berthomier, M. and Wahlund, J.-E. (2000). Identification of widespread turbulence of dispersive Alfvén waves. Geophysical Research Letters 27: doi: 10.1029/1999GL010696. issn: 0094-8276.

A revised analysis of Freja observations shows that events interpreted previously as broadband turbulence in the frequency domain, f~1--500 Hz represent in fact turbulence of dispersive Alfv¿n waves (DAW) covering a wide range of wave vectors k. A satellite's motion through broad Δk, low frequency, &ohgr;<&ohgr;ci, Alfv¿nic structures makes them appear as broadband waves at (Doppler) frequencies Δ&ohgr;=vs⋅Δk in the satellite reference frame. The identification is made with the measured ratio of ΔE/ΔB fluctuations which is consistent with the theoretical prediction for inertial Alfv¿n wave spectrum at spatial scales &lgr;~30 --7000 m. In addition, we demonstrate that the multipoint measurements with double density probes provide independent confirmation of the spatial nature of the low frequency fluctuations. ¿ 2000 American Geophysical Union

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Abstract

Keywords
Magnetospheric Physics, Plasma waves and instabilities, Space Plasma Physics, Turbulence
Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/
Publisher
American Geophysical Union
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