Multi-point observations of the Poynting vector associated with field line resonance

Details Multi-point observations of the Poynting vector associated with field line resonance Multi-point observations of the Poynting vector associated with field line resonance

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm22a..06h&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM22A-06

Physics

Plasma Physics

[2752] Magnetospheric Physics / Mhd Waves And Instabilities, [2772] Magnetospheric Physics / Plasma Waves And Instabilities, [7836] Space Plasma Physics / Mhd Waves And Instabilities, [7868] Space Plasma Physics / Wave/Wave Interactions

Scientific paper

Earth’s magnetosphere is an inhomogeneous medium. This permits different magnetohydrodynamic (MHD) wave modes to couple through the field line resonance (FLR) mechanism, driving localized standing waves. Understanding the dynamics of these standing waves is important because of their interactions with the radiation belts and their usefulness as a plasma diagnostic tool. In the present study, we use multi-point observations from the THEMIS mission to examine the Poynting vector associated with several FLRs driven by magnetopause surface waves during quiet geomagnetic conditions. We found that much of the net energy flux was directed towards the magnetotail, with comparable energy flux towards the ionosphere and weaker energy flux towards the Earth. The relationship between the radial and tailward energy flux has important implications for both the coupling between surface wave and FLR and the net energy transfer from the outer magnetosphere to the inner magnetosphere.

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