Nonlinear Processes in Geophysics www.nonlin-processes-geophys.net 1023-5809 1607-7946 15 1 2008 10.5194/npg-15-95-2008 http://www.nonlin-processes-geophys.net/15/95/2008/ http://www.nonlin-processes-geophys.net/15/95/2008/npg-15-95-2008.html http://www.nonlin-processes-geophys.net/15/95/2008/npg-15-95-2008.pdf 95 108 2008-02-11 Solar wind vs magnetosheath turbulence and Alfvén vortices O. Alexandrova olga.alexandrova@obspm.fr LESIA, Observatoire de Paris, CNRS, UPMC, Université Paris Diderot; 5 Place Jules Janssen, 92190 Meudon, France now at: Institute of Geophysics and Meteorology, University of Cologne, Germany In this paper we give firstly a broad review of the space plasma turbulence around the ion characteristic space and temporal scales within two natural laboratories, the solar wind and the Earth magnetosheath. In both regions power law spectra of magnetic fluctuations are observed. In both regions these spectra have a break in the vicinity of the ion cyclotron frequency. 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