Joint two-dimensional observations of ground magnetic and ionospheric electric fields associated with auroral zone currents: 3. Auroral zone currents during the passage of a westward travelling surge
Article Sidebar
Published:
Jan 22, 1981
Keywords:
Scandinavian Magnetometer Array,
STARE radars,
Westward travelling surge,
Current system modelling
Volumes
Vols. 1-18 (1924-1944), ISSN 0044-2801
Main Article Content
Abstract
Ground magnetic perturbations and ionospheric electric fields have been observed by the Scandinavian Magnetometer Array and the STARE radars, respectively, during the passage of a westward travelling surge in the late evening sector. On the basis of these measurements, the three-dimensional current system in the vicinity of the westward travelling surge is modelled. The results support a current model recently proposed by Rostoker and co-workers on the basis of purely magnetic ground-based measurements. In particular, we can identify an upward field-aligned current of about 5 x 104 A in the head of the surge. Ahead of the surge, we find a south-eastward directed electric field. Additionally, we have some evidence for the existence of a southwestward directed electric field east of the surge. The latter may be explained by the generation of polarisation charges at the northern and southern boundaries of the higher conducting region east of the surge's head.
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Article Details
How to Cite
Inhester, B., Baumjohann, W., Greenwald, R., & Nielsen, E. (1981). Joint two-dimensional observations of ground magnetic and ionospheric electric fields associated with auroral zone currents: 3. Auroral zone currents during the passage of a westward travelling surge. Journal of Geophysics, 49(1), 155-162. Retrieved from https://journal.geophysicsjournal.com/JofG/article/view/156
Section
References
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Baumjohann, W., Kamide, Y. (1981) Joint two-dimensional observations of ground magnetic and ionospheric electric fields associated with auroral zone currents. 2. Three-dimensional current flow in the morning sector during substorm recovery. J. Geomagn. Geoelectr. 33 (In press)
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Baumjohann, W., Pellinen, R.J., Opgenoorth, H.J., Nielsen, E. (1981) Joint two-dimensional observations of ground magnetic and ionospheric electric fields associated with auroral zone currents. 4. Current systems associated with local auroral breakups. Planet. Space Sci. 29 (In press)
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Cahill, L.J. Jr., Greenwald, R.A., Nielsen, E. (1978) Auroral radar and rocket double-probe observations of the electric field across the Harangdiscontinuity. Geophys. Res. Lett. 5:687-690
Ecklund, W.L., Balsley, B.B., Carter, D.A. (1977) A preliminary comparison of F region plasma drifts and E region irregularity drifts in the auroral zone. J. Geophys. Res. 82:195-197
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Farley, D.J. (1963) A plasma instability resulting in field-aligned irregularities in the ionosphere. J. Geophys. Res. 68:6083-6097
Greenwald, R.A., Weiss, W., Nielsen, E., Thomson, N.R. (1978) STARE: a new radar auroral backscatter experiment in northern Scandinavia. Radio Sci. 13:1021-1039
Gustafsson, G. (1970) A revised corrected geomagnetic coordinate system. Ark. Geofys. 5:595-617
Horwitz, J.L., Doupnik, J.R., Banks, P.M. (1978) Chatanika radar observaions of the latitudinal distributions of auroral zone electric fields, conductivities, and currents. J. Geo phys. Res. 83:1463-1481
Kamide, Y., Brekke, A. (1977) Altitude of the eastward and westward auroral electrojets. J. Geophys. Res. 82:2851-2853
Kisabeth, J.L., Rostoker, G. (1973) Current flow in auroral loops and surges inferred from ground-based magnetic observations. J. Geophys. Res. 78:5573-5584
Kuppers, F., Untiedt, J., Baumjohann, W., Lange, K., Jones, A.G. (1979) A two-dimensional magnetometer array for ground-based observations of auroral zone electric currents during the International Magnetospheric Study (IMS). J. Geophys. 46:429-450
Maurer, H., Theile, B. (1978) Parameters of the auroral electrojet from magnetic variations along a meridian. J. Geophys. 44:415-426
Meng, C.-I., Snyder, A.L., Kroehl, H.W. (1978) Observations of auroral westward travelling surges and electron precipitations. J. Geophys. Res. 83:575-585
Reme, H., Bosqued, J.M. (1973) Rocket observations of electron precipitation in a westward travelling surge. J. Geophys. Res. 78:5553-5558
Rogister, A., D'Angelo, N. (1970) Type II irregularities in the equatorial electrojet. J. Geophys. Res. 75:3879-3887
Rostoker, G., Hughes, T.J. (1979) A comprehensive model current system for high-latitude magnetic activity - II. The substorm component. Geophys. J.R. Astron. Soc. 58:571-581
Tighe, W.G., Rostoker, G. (1981) Characteristics of westward travelling surges during magnetospheric substorms. J. Geophys. (In press)
Akasofu, S.-I., Meng, C.-l., Kimball, D.S. (1966) Dynamics of the aurora - IV. Polar magnetic substorms and westward travelling surges. J. Atmos. Terr. Phys. 28:489-496
Akasofu, S.-I., Eather, R.H., Bradbury, J.N. (1969) The absence of the hydrogen emission (HiJ) in the westward travelling surge. Planet. Space Sci. 17:1409-1412
Banks, P.M., Doupnik, J.R. (1975) A review of auroral zone electrodynamics deduced from incoherent scatter radar observations. J. Atmos. Terr. Phys. 37:951-972
Banks, P.M., Doupnik, J.R., Akasofu, S.-I. (1973) Electric field observations by incoherent scatter radar in the auroral zone. J. Geophys. Res. 78:6607-0622
Baumjohann, W., Kamide, Y. (1981) Joint two-dimensional observations of ground magnetic and ionospheric electric fields associated with auroral zone currents. 2. Three-dimensional current flow in the morning sector during substorm recovery. J. Geomagn. Geoelectr. 33 (In press)
Baumjohann, W., Untiedt, J., Greenwald, R.A. (1980) Joint two-dimensional observations of ground magnetic and ionospheric electric fields associated with auroral zone currents. I. Three-dimensional current flows associated with a substorm-intensified eastward electrojet. J. Geophys. Res. 85:1963-1978
Baumjohann, W., Pellinen, R.J., Opgenoorth, H.J., Nielsen, E. (1981) Joint two-dimensional observations of ground magnetic and ionospheric electric fields associated with auroral zone currents. 4. Current systems associated with local auroral breakups. Planet. Space Sci. 29 (In press)
Boyd, J.S., Belon, A.E., Romick, G.J. (1971) Latitude and time variations in precipitated electron energy inferred from measurements of auroral height. J. Geophys. Res. 76:7694-7700
Cahill, L.J. Jr., Greenwald, R.A., Nielsen, E. (1978) Auroral radar and rocket double-probe observations of the electric field across the Harangdiscontinuity. Geophys. Res. Lett. 5:687-690
Ecklund, W.L., Balsley, B.B., Carter, D.A. (1977) A preliminary comparison of F region plasma drifts and E region irregularity drifts in the auroral zone. J. Geophys. Res. 82:195-197
Evans, D.S., Maynard, N.C., Trnim, J., Jacobsen, T., Egeland, A. (1977) Auroral vector electric field and particle comparisons. 2. Electrodynamics of an arc. J. Geophys. Res. 82:2235-2249
Farley, D.J. (1963) A plasma instability resulting in field-aligned irregularities in the ionosphere. J. Geophys. Res. 68:6083-6097
Greenwald, R.A., Weiss, W., Nielsen, E., Thomson, N.R. (1978) STARE: a new radar auroral backscatter experiment in northern Scandinavia. Radio Sci. 13:1021-1039
Gustafsson, G. (1970) A revised corrected geomagnetic coordinate system. Ark. Geofys. 5:595-617
Horwitz, J.L., Doupnik, J.R., Banks, P.M. (1978) Chatanika radar observaions of the latitudinal distributions of auroral zone electric fields, conductivities, and currents. J. Geo phys. Res. 83:1463-1481
Kamide, Y., Brekke, A. (1977) Altitude of the eastward and westward auroral electrojets. J. Geophys. Res. 82:2851-2853
Kisabeth, J.L., Rostoker, G. (1973) Current flow in auroral loops and surges inferred from ground-based magnetic observations. J. Geophys. Res. 78:5573-5584
Kuppers, F., Untiedt, J., Baumjohann, W., Lange, K., Jones, A.G. (1979) A two-dimensional magnetometer array for ground-based observations of auroral zone electric currents during the International Magnetospheric Study (IMS). J. Geophys. 46:429-450
Maurer, H., Theile, B. (1978) Parameters of the auroral electrojet from magnetic variations along a meridian. J. Geophys. 44:415-426
Meng, C.-I., Snyder, A.L., Kroehl, H.W. (1978) Observations of auroral westward travelling surges and electron precipitations. J. Geophys. Res. 83:575-585
Reme, H., Bosqued, J.M. (1973) Rocket observations of electron precipitation in a westward travelling surge. J. Geophys. Res. 78:5553-5558
Rogister, A., D'Angelo, N. (1970) Type II irregularities in the equatorial electrojet. J. Geophys. Res. 75:3879-3887
Rostoker, G., Hughes, T.J. (1979) A comprehensive model current system for high-latitude magnetic activity - II. The substorm component. Geophys. J.R. Astron. Soc. 58:571-581
Tighe, W.G., Rostoker, G. (1981) Characteristics of westward travelling surges during magnetospheric substorms. J. Geophys. (In press)