Modeling global O+ substorm injection using analytic magnetic field model

doi:doi:10.1029/2006JA011607

Abstract

Cited By (8)

Abstract

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 111, A11S07, 8 PP., 2006
doi:10.1029/2006JA011607

Modeling global O+ substorm injection using analytic magnetic field model

S. T. Jones

Universities Space Research Association, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA

M.-C. Fok

NASA Goddard Space Flight Center, Greenbelt, Maryland, USA

P. C. Brandt

Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, USA

During storm-time substorms the IMAGE/High-Energy Neutral Atom (HENA) global magnetospheric plasma imager observes dramatic rise and fall of the oxygen energetic neutral atom (ENA) fluxes in the 29–180 keV range that are well correlated with substorm onsets. The corresponding hydrogen ENA flux (10–198 keV) shows a much more gradual rise and fall. We use a three-dimensional test particle code in time varying electric and magnetic fields to study mechanisms causing the dramatic oxygen variation. Consistent with our previous work, we find that nonadiabatic heating occurs during the dipolarization of the geomagnetic field. The simulation model reproduces key features including the high-altitude increase of the ENA flux and enhancement timescale.

Received 10 January 2006; accepted 21 August 2006; published 12 October 2006.

Citation: Jones, S. T., M.-C. Fok, and P. C. Brandt (2006), Modeling global O+ substorm injection using analytic magnetic field model, J. Geophys. Res., 111, A11S07, doi:10.1029/2006JA011607.

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