Multi-spacecraft tracing of turbulent boundary layer

S. Savin, L. Zelenyi, N. Maynard, I. Sandahl, H. Kawano, C. T. Russell, S. Romanov, E. Amata, L. Avanov, J. Blecki, J. Buechner, G. Consolini, G. Gustafsson, S. Klimov, F. Marcucci, Z. Nemecek, B. Nikutowski, J. Pickett, J. L. Rauch, J. SafrankovaA. Skalsky, V. Smirnov, K. Stasiewicz, P. Song, J. G. Trotignon, Yu Yermolaev

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Abstract

Multi-spacecraft tracing of the high latitude magnetopause (MP) and boundary layers and Interball-1 statistics indicate that: (a) The turbulent boundary layer (TBL) is a persistent feature in the region of the cusp and 'sash', a noticeable part of the disturbances weakly depends on the interplanetary magnetic field By component; TBL is a major site for magnetosheath (MSH) plasma penetration inside the magnetosphere through percolation and local reconnection. (b) The TBL disturbances are mainly inherent with the characteristic kinked double-slope spectra and, most probably, 3-wave cascading. The bi-spectral phase coupling indicates self-organization of the TBL as the entire region with features of the non-equilibrium multi-scale and multi-phase system in the near-critical state. (c) We've found the different outer cusp topologies in summer/winter periods: the summer cusp throat is open for the decelerated MSH flows, the winter one is closed by the distant MP with a large-scale (-several Re) diamagnetic 'plasma ball' inside; the MP; the 'ball' is filled from MSH through patchy merging rather than large-scale reconnection. (d) A mechanism for the energy release and mass inflow is the local TBL reconnection, which operates at the larger scales for the average anti-parallel fields and at the smaller scales for the nonlinear fluctuating fields; the latter is operative throughout the TBL. The remote from TBL anti-parallel reconnection seems to happen independently.

Original languageEnglish
Pages (from-to)2821-2830
Number of pages10
JournalAdvances in Space Research
Volume30
Issue number12
DOIs
Publication statusPublished - Dec 2002

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Astronomy and Astrophysics
  • Geophysics
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences(all)

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    Savin, S., Zelenyi, L., Maynard, N., Sandahl, I., Kawano, H., Russell, C. T., Romanov, S., Amata, E., Avanov, L., Blecki, J., Buechner, J., Consolini, G., Gustafsson, G., Klimov, S., Marcucci, F., Nemecek, Z., Nikutowski, B., Pickett, J., Rauch, J. L., ... Yermolaev, Y. (2002). Multi-spacecraft tracing of turbulent boundary layer. Advances in Space Research, 30(12), 2821-2830. https://doi.org/10.1016/S0273-1177(02)80422-7