Features of the interaction of interplanetary coronal mass ejections/magnetic clouds with the Earth's magnetosphere

Тип публикации: статья из журнала

Год издания: 2013

Идентификатор DOI: 10.1016/j.jastp.2012.11.014

Ключевые слова: Interplanetary coronal mass ejections, Magnetosheath flow, ICME-ICME interactions, 2-Dip geomagnetic storms, 2-Dip geomagnetic storms, ICME-ICME interactions, Interplanetary coronal mass ejections, Magnetosheath flow, Earth's magnetosphere, Geomagnetic storm, Hydrodynamic forces, Interplanetary coronal mass ejections, Large geomagnetic disturbances, Magnetic field line, Magnetosheath flow, Solar wind-magnetosphere interactions, Geomagnetism, Mach number, Magnetic fields, Planetary surface analysis, Solar system, Solar wind, Magnetosphere

Аннотация: The interaction of interplanetary coronal mass ejections (ICMEs) and magnetic clouds (MCs) with the Earth's magnetosphere exhibits various interesting features principally due to interplanetary parameters which change slowly and reach extreme values of long duration. These, in turn, allow us to explore the geomagnetic response to continued and extreme driving of the magnetosphere. In this paper we shall discuss elements of the following: (i) anomalous features of the flow in the terrestrial magnetosheath during ICME/MC passage and (ii) large geomagnetic disturbances when total or partial mergers of ICMEs/MCs pass Earth. In (i) we emphasize two roles played by the upstream Alfven Mach number in solar wind-magnetosphere interactions: (i) It gives rise to wide plasma depletion layers. (ii) It enhances the magnetosheath flow speed on draped magnetic field lines. (By plasma depletion layer we mean a magnetosheath region adjacent to the magnetopause where magnetic forces dominate over hydrodynamic forces.) In (ii) we stress that the ICME mergers elicit geoeffects over and above those of the individual members. In addition, features of the non-linear behavior of the magnetosphere manifest themselves. (C) 2012 Elsevier Ltd. All rights reserved.

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Издание

Журнал: JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS

Выпуск журнала: Vol. 99

Номера страниц: 14-26

ISSN журнала: 13646826

Место издания: OXFORD

Издатель: PERGAMON-ELSEVIER SCIENCE LTD

Авторы

  • Farrugia C.J. (Space Science Center,University of New Hampshire)
  • Lugaz N. (Space Science Center,University of New Hampshire)
  • Torbert R.B. (Space Science Center,University of New Hampshire)
  • Erkaev N.V. (Siberian Federal University)
  • Jordanova V.K. (Los Alamos National Lab.)
  • Sandholt P.E. (Department of Physics,University of Oslo)
  • Muhlbachler S. (Austrian Research Institute)

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