論文

査読有り
2005年

Geospace storm processes coupling the ring current, radiation belt and plasmasphere

Geophysical Monograph Series
  • M. C. Fok
  • ,
  • Y. Ebihara
  • ,
  • T. E. Moore
  • ,
  • D. M. Ober
  • ,
  • K. A. Keller

159
開始ページ
207
終了ページ
220
記述言語
英語
掲載種別
論文集(書籍)内論文
DOI
10.1029/159GM16
出版者・発行元
Blackwell Publishing Ltd

The plasmasphere/ring-current/radiation-belt are interacting systems. The magnetic field generated by the ring current changes the drift paths of energetic particles. Pressure gradients in the ring current produce the region 2 field aligned currents, which close in the ionosphere and create an electric field that acts to shield the lower-latitude region from the full force of convection. In turn, this shielding field alters the transport of the ring current and plasmaspheric plasmas. Furthermore, the anisotropy in the ring current plasmas excites waves that cause pitch-angle and energy diffusion of radiation belt and ring current particles. On the other hand, the precipitation of energetic electrons modifies the ionospheric conductances, and thus the electric field configuration in the magnetosphere-ionosphere system. A number of models of the plasmasphere, ring current and the radiation belt have been developed to study the behaviors of the inner magnetosphere during geospace storms. However, the majority of these models are designed to study a particular plasma population, without the consideration of interactions from others. In this paper, we briefly describe state-of-the-art models of the plasmasphere, ring current, and radiation belt, and present results from a preliminary coupling effort. The coupled models are shown to produce certain observed features of the inner magnetosphere: the post-midnight peak of storm main phase ring current ion flux
the plasmaspheric disturbance produced by impulsive substorm plasma injections, and the slow ramp-up of geosynchronous fluxes associated with energy diffusion. We conclude by presenting a framework on coupling these models together interactively to make significant progress toward a realistic plasmasphere/ring-current/ radiation-belt interaction model.

リンク情報
DOI
https://doi.org/10.1029/159GM16
ID情報
  • DOI : 10.1029/159GM16
  • ISSN : 2328-8779
  • ISSN : 0065-8448
  • SCOPUS ID : 84905347296

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