Cusp and Dayside Boundary Layer Dynamics During Various IMF Conditions

Details Cusp and Dayside Boundary Layer Dynamics During Various IMF Conditions Cusp and Dayside Boundary Layer Dynamics During Various IMF Conditions

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm12c..08e&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SM12C-08

Physics

2724 Magnetopause, Cusp, And Boundary Layers, 2740 Magnetospheric Configuration And Dynamics, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

Dayside boundary layer and cusp characteristics have been studied during different interplanetary magnetic field (IMF) conditions. Energy, mass and momentum transfer from the solar wind to the magnetosphere is discussed based on data from 25 Cluster spacecraft passes of the dayside boundary layers. Particle data from the Cluster Ion Spectrometer (CIS) experiment that primarily covers the energy range between 0.02 and 38 keV/q are combined with magnetic field data from the fluxgate magnetometers (FGM) to determine boundaries and current sheets. Plasma acceleration and deceleration and the dynamics of the magnetopause current sheet clearly respond to changes in the IMF. Plasma injection from the dayside magnetosheath varies from transient injections to weak diffusion. Studies of the various ion components give valuable new insight into the processes that accelerate plasma within the boundary layers adjacent to the magnetopause. Multi-point observations provide excellent data to study the dynamics of the high latitude magnetopause, injection of plasma into the cusp proper and to determine the relative importance of different energy exchange mechanisms.

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