Modes of energy transfer from the solar wind to the inner magnetosphere

Details Modes of energy transfer from the solar wind to the inner magnetosphere Modes of energy transfer from the solar wind to the inner magnetosphere

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm12b..05v&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM12B-05

Physics

[2730] Magnetospheric Physics / Magnetosphere: Inner, [2784] Magnetospheric Physics / Solar Wind/Magnetosphere Interactions, [2788] Magnetospheric Physics / Magnetic Storms And Substorms

Scientific paper

The energy provided by the solar wind to geospace finds its way to the inner magnetosphere and leads to variations in the mid-latitude ground magnetic field. Through measurement of field disturbances and energetic particle fluxes one can show that the inner magnetospheric behavior is organized in large-scale modes of response. Each mode is excited by a different combination of solar wind plasma and field variables which often occur in characteristic geoeffective structures. We compare the wave field and energetic-electron modes of response to solar wind variables as obtained by filter and correlation techniques. Characteristic modes of response are found for low-frequency wave fields measured by mid- and high-latitude meridional arrays such as MEASURE and the geosynchronous field recorded by GOES magnetometers. The modes are similar to those obtained earlier for magnetospheric electron flux such as that measured by the HIST instrument on POLAR, and the similarity is used to determine the parameter range in L, MLT, time, and perpendicular energy for drift-resonant interaction. We present modeling results for the excitation of these wave fields during the passage of the interplanetary structures.

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