Magnetopause structure and dynamics: Issues for GEM (geospace environment modeling)

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Recent multi-spacecraft observations of the magnetopause have allowed us to establish its structure and dynamical behavior. The magnetopause current sheet is thicker than expected, often ten magnetosheath ion gyroradii or more. One very important result has been the confirmation of magnetic reconnection in both its quasi- steady and transient forms. A boundary layer of magnetosheath-like plasma is often, but not always, observed earthward of the magnetopause current layer. There is considerable small-scale magnetic structure within the current layer, suggesting the presence of filamentary currents much smaller than an ion gyroradius. Such micro-structure may be important in particle diffusion and, hence, ... continued below

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Pages: 18

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Elphic, R.C. January 1, 1989.

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Recent multi-spacecraft observations of the magnetopause have allowed us to establish its structure and dynamical behavior. The magnetopause current sheet is thicker than expected, often ten magnetosheath ion gyroradii or more. One very important result has been the confirmation of magnetic reconnection in both its quasi- steady and transient forms. A boundary layer of magnetosheath-like plasma is often, but not always, observed earthward of the magnetopause current layer. There is considerable small-scale magnetic structure within the current layer, suggesting the presence of filamentary currents much smaller than an ion gyroradius. Such micro-structure may be important in particle diffusion and, hence, reconnection. There are many outstanding questions, among them: How does the low latitude boundary layer form. Why is the magnetopause current layer so thick. What is the detailed structure and topology of FTEs. How are quasi-steady and transient reconnection related. The GEM program may help us address these issues. 18 refs., 9 figs.

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Pages: 18

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NTIS, PC A03/MF A01 - OSTI; 1.

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  • 1. geospace environment modeling (GEM) workshop, San Diego, CA, USA, 19 Feb 1989

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  • Other: DE89012620
  • Report No.: LA-UR-89-1595
  • Report No.: CONF-8902115-1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 6017620
  • Archival Resource Key: ark:/67531/metadc1098376

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  • January 1, 1989

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  • Feb. 18, 2018, 3:59 p.m.

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  • May 23, 2018, 2:12 p.m.

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Elphic, R.C. Magnetopause structure and dynamics: Issues for GEM (geospace environment modeling), article, January 1, 1989; New Mexico. (digital.library.unt.edu/ark:/67531/metadc1098376/: accessed November 13, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.