Towards a more quantitative understanding of dayside magnetopause currents
Abstract
Considering the magnetopause as a thin current sheet, and applying Maxwell's third equation to a vector superposition of magnetic fields of different origins, the orthogonal components of the magnetopause current intensity can be determined. Analyses of ISEE and HEOS 2 magnetometer data for the dayside magnetopause, outer cusp, and near earth magnetotail regions show that the magnetopause current possesses both a magnetospheric magnetic field aligned component and a cross field (ChapmanFerraro) component. Further, it appears that particularly at low latitudes near noon, the magnetospheric magnetic field aligned component is a useful parameter with which to these calculated magnetopause field aligned currents, and their variations with both the dawndusk component of the interplanetary magnetic field and local time, are investigated in relation to statistical studies of the high latitude ionospheric Birkeland current flow.
 Publication:

Magnetospheric Boundary Layers
 Pub Date:
 August 1979
 Bibcode:
 1979ESASP.148..381S
 Keywords:

 Current Sheets;
 Magnetohydrodynamics;
 Magnetopause;
 Birkeland Currents;
 Convection Currents;
 Current Density;
 Field Aligned Currents;
 Geomagnetic Tail;
 Heos B Satellite;
 Magnetic Field Configurations;
 Maxwell Equation;
 Superposition (Mathematics);
 Geophysics