[en] Images of the Earth's proton aurora from the IMAGE spacecraft on 8 June 2000 indicate a temporally and spatially isolated ionospheric response to a shock that impinged on the Earth's magnetopause. Sometime after this ionospheric response, the Low Energy Neutral Atom imager on IMAGE detected enhanced ionospheric outflow. The time delay between the ionospheric response and the enhanced outflow is consistent with the travel time of ~30 eV neutral Oxygen (created by charge exchange of outflowing O[SUP]+[/SUP] with the exosphere) from the low altitude ionosphere to the spacecraft. The prompt ionospheric outflow implies that the shock deposited sufficient energy in the topside ionosphere near or above the O[SUP]+[/SUP] exobase to initiate the outflow.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Fuselier, S. A.
Ghielmetti, A. G.
Moore, T. E.
Collier, M. R.
Quinn, J. M.
Wilson, G. R.
Wurz, P.
Mende, S. B.
Frey, H. U.
Jamar, Claude ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Gérard, Jean-Claude ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Burch, J. L.
Language :
English
Title :
Ion outflow observed by IMAGE: Implications for source regions and heating mechanisms
Publication date :
01 March 2001
Journal title :
Geophysical Research Letters
ISSN :
0094-8276
eISSN :
1944-8007
Publisher :
American Geophysical Union, Washington, United States - District of Columbia
André M., Yau A.L. (1997) Theories and observation of ion energization and outflow in the high latitude magnetosphere. Space Sci. Rev 80:27.
Burch J.L. (2000) IMAGE mission overview. Space Sci. Rev 91:1.
Collin H.L., Peterson W.K., Lennartson O.W., Drake J.F. (1998) The seasonal variation of auroral ion beams. Geophys. Res. Lett 25:4071.
Ghielmetti A.G., Shelley E.G., Fuselier S.A., Wurz P., Bochler P., Herreo F.A., Smith M.F., Stephen T.S. (1994) Mass spectograph for imaging low-energy neutral atoms. Optical Eng 33:362.
Gombosi T.I., Kileen T.L. (1987) Effects of thermospheric motions of the polar wind: A time-dependent numerical study. J. Geophys. Res 92:4725.
Heelis R.A., Bailey G.J., Sellek R., Moffett R.J., Jenkins B. (1993) Field-aligned drifts in subauroral ion drift events. J. Geophys. Res 98:21493.
Horwitz J.L., Moore T.E. (1997) Four contemporary issues concerning ionospheric plasma flow to the magnetosphere. Space Sci. Rev 80:49.
Klumpar D.M. (1986) A digest and comprehensive bibliography on transverse auroral ion acceleration. Ion Acceleration in the Magnetosphere and Ionosphere , Geophys. Monogr., American Geophysical Union; 389.
Mende S.B. (2000) Far ultraviolet imaging from the IMAGE spacraft: 3. Spectral imaging of Lyman-alpha and O1 135.6 nm. Space Sci. Rev 287.
Moore T.E., Lockwood M., Chandler M.O., Waite J.H. Jr., Chappell C.R., Persoon A., Sugiura M. (1986) Upwelling O+ ion source characteristics. J. Geophys. Res 91:7019.
Moore T.E. (1999) Ionospheric mass ejection in response to a CME. Geophys. Res. Left 26:2339.
Moore T.E. (2000) The low energy neutral atom imager for IMAGE. Space Sci. Rev 155.
Pollock C.J., Chander M.O., Moore T.E., Waite J.H. Jr., Chappell C.R., Gurnett D.A. (1990) A survey of upwelling ion event characteristics. J. Geophys. Res 95:18969.
Shelley E.G., Johnson R.D., Sharp R.D. (1972) Satelite observations of energetic heavy ions during a geomagnetic storm. J. Geophys. Res 77:6104.
Wurz P. (1993) Concept of the HI-Lite Neutral Atom Imaging Instrument. Proceedings of the Symposium on Surface , Science eds. P. Varga, and G. Bertz, Kaprun, Austria; 225-230.
Yau A.W., Shelley E.G., Peterson W.K., Lenchyshyn L. (1985) Energetic auroral and polar ion outflow at DE-1 altitudes: Magnitude, composition, magnetic activity dependence and long-term variations. J. Geophys. Res 90:8417.