Anisotropic scaling features and complexity in magnetospheric-cusp: a case study
- 1Space Research Center, Polish Academy of Sciences, Warsaw, Poland
- 2Space Research Institute, Bulgarian Academy of Sciences, Sofia, Bulgaria
- 3Swedish Institute of Space Physics, Uppsala, Sweden
- 4Istituto di Fisica dello Spazio Interplanetario, INAF, Roma, Italy
- 5Istituto di Fisica dei Sistemi Complessi, CNR, Firenze, Italy
Abstract. Magnetospheric cusps are high-latitude regions characterized by a highly turbulent plasma, playing a special role in the solar wind-magnetosphere interaction. Here, using POLAR satellite magnetic field vector measurements we investigate the anisotropic scaling features of the magnetic field fluctuations in the northern cusp region. Our results seem to support the hypothesis of a 2D-MHD turbulent scenario which is consequence of a strong background magnetic field. The observed turbulent fluctuations reveal a high degree of complexity, which might be due to the interplay of many competing scales. A discussion of our findings in connection with the complex scenario proposed by Chang et al. (2004) is provided.