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, Earth's magnetosphere, Geomagnetic storm, Hydrodynamic forces, Large geomagnetic disturbances, Magnetic field line, 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 cПоказать полностьюontinued 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.
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