TERRAPUB Earth, Planets and Space
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Earth Planets Space, Vol. 62 (No. 2), pp. e1-e4, 2010
doi:10.5047/eps.2010.02.001

E-LETTER

Anisotropy evolution of magnetic field fluctuation through the bow shock

Y. Narita1 and K.-H. Glassmeier1,2

1Institut für Geophysik und extraterrestrische Physik, Technische Universität Braunschweig, Mendelssohnstraße 3, D-38106 Braunschweig, Germany
2Max-Planck-Institut für Sonnensystemforschung, Max-Planck-Straße 2, D-37191 Katlenburg-Lindau, Germany

(Received September 30, 2009; Revised January 29, 2010; Accepted February 1, 2010; Online published February 22, 2010)

Abstract: Measurement of energy distributions in the wave vector domain reveals how anisotropy of turbulent magnetic field fluctuations evolves as the solar wind encounters the terrestrial bow shock and the magnetosphere. While fluctuations in the solar wind, the magnetosheath, and the magnetospheric cusp regions are characterized by the perpendicular wave vector geometry to the mean magnetic field direction, that in the foreshock region is characterized by the parallel wave vector geometry. Linear and nonlinear plasma processes are discussed for the anisotropy evolution.
Key words: Wave-vector spectra, magnetic field, bow shock, multi-point measurements.


Corresponding author E-mail: y.narita@tu-bs.de


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