Physics
Scientific paper
Jan 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....91..183t&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Jan. 1, 1986, p. 183-189.
Physics
16
Auroral Zones, Earth Magnetosphere, Electric Fields, Electromagnetic Interactions, Field Aligned Currents, Ionospheric Currents, Magnetic Fields, Geomagnetism, Hall Effect, Mathematical Models
Scientific paper
An attempt has been made to evaluate the direct contribution of the horizontal component of oblique field-aligned currents (FACs) to the surface magnetic field variations in the auroral region associated with a localized electric potential distribution on the horizontal plane, in comparison with that of the ionospheric eddy current. A relative importance of this direct contribution of oblique FACs to that from the ionospheric eddy current is proportional to a product of two ratios, the Pedersen to Hall conductivities and the horizontal to vertical components of the local dipole magnetic field intensity. In addition, the shorter the horizontal scale length in the east-west direction compared with that in the north-south one, the larger the direct contribution of FACs. For a localized perturbation with an isotropic horizontal structure at 60 deg geomagnetic latitude the direct effect of oblique FACs to the ground magnetic field attains about 80 percent of the magnetic contribution of the associated ionospheric Hall current at the earth's surface. It is also shown that only the vertical component of the oblique FACs connects with the irrotational part of ionospheric currents and that the effective conductance in the magnetosphere for three-dimensional current systems is reduced to a smaller value than that for the case of vertical field lines.
No associations
LandOfFree
Direct contribution of oblique field-aligned currents to ground magnetic fields does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Direct contribution of oblique field-aligned currents to ground magnetic fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct contribution of oblique field-aligned currents to ground magnetic fields will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1846577