Anisotropic Spatial Turbulent Spectra in the Magnetosheath: Cluster Results

Details Anisotropic Spatial Turbulent Spectra in the Magnetosheath: Cluster Results Anisotropic Spatial Turbulent Spectra in the Magnetosheath: Cluster Results

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsm51a1277s&link_type=abstract

American Geophysical Union, Fall Meeting 2005, abstract #SM51A-1277

Physics

2728 Magnetosheath, 2772 Plasma Waves And Instabilities (2471), 7835 Magnetic Reconnection (2723, 7526), 7836 Mhd Waves And Instabilities (2149, 2752, 6050), 7863 Turbulence (4490)

Scientific paper

Mirror modes are known to develop in high beta plasmas when the ion perpendicular temperature is larger than the parallel one. Such physical conditions are usually met in the in front of magnetized planets, due to the solar wind compression in these regions. In the terrestrial magnetosheath, Sahraoui et al (2003, 2004) have shown in a case study that most of the magnetic fluctuations observed in the frequency range [0-5fci] belong unambiguously to this mode, by making use of the CLUSTER data, analyzing them through the so-called k-filtering technique, and comparing them with the theoretical kinetic linear prediction. Here, we present an extension of these previous analyses by providing the first complete 3D k spectra of the observed turbulence. A strong anisotropy is observed in the turbulence, which is shown to be controlled by both the static magnetic field and the magnetopause normal. This leads to a quasi-1D cascade, with a new power law, determined over more than one decade, which characterizes this incoherent mirror turbulence. We will also emphasize the experimental constraints that are due to the Cluster separations for such turbulence studies, and the need of a new theory of magnetized compressible turbulence to interpret these new observations.

Affiliated with

Also associated with

No associations

Rating

Anisotropic Spatial Turbulent Spectra in the Magnetosheath: Cluster Results does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Anisotropic Spatial Turbulent Spectra in the Magnetosheath: Cluster Results, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anisotropic Spatial Turbulent Spectra in the Magnetosheath: Cluster Results will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1028490