|
Detailed Reference Information |
Vennerstrøm, S., Moretto, T., Olsen, N., Friis-Christensen, E., Stampe, A.M. and Watermann, J.F. (2002). Field-aligned currents in the dayside cusp and polar cap region during northward IMF. Journal of Geophysical Research 107: doi: 10.1029/2001JA009162. issn: 0148-0227. |
|
The field-aligned currents in the dayside cusp and polar cap region are examined using magnetic data from the low-altitude polar-orbiting satellite ¿rsted. The study is confined to cases where the interplanetary magnetic field (IMF) has a steady northward component and to a rather narrow region spanning ~4 hours around magnetic noon. We examine individual passes using a maximum variance analysis method, and we complement, for a single event, with ground-based data from the Greenland meridian chain of magnetometers. We suggest that when an east-west component By of the IMF exists for positive IMF Bz, the two NBZ (northward Bz) field-aligned currents that prevail over the polar region rotate to form the two field-aligned currents equatorward and poleward of the east-west flowing ionospheric DPY current in the dayside. The high accuracy of the ¿rsted data makes it possible to uncover details not previously described. |
|
|
|
BACKGROUND DATA FILES |
|
|
Abstract |
|
|
|
|
|
Keywords
Magnetospheric Physics, Magnetopause, cusp, and boundary layers, Magnetospheric Physics, Current systems, Magnetospheric Physics, Polar cap phenomena, Magnetospheric Physics, Solar wind/magnetosphere interactions, Ionosphere, Polar cap ionosphere |
|
Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
|
|
|