Geospace Storms and Thermal Ions in the Near-Earth Magnetotail

Details Geospace Storms and Thermal Ions in the Near-Earth Magnetotail Geospace Storms and Thermal Ions in the Near-Earth Magnetotail

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusmsm41c..06c&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SM41C-06

Physics

2704 Auroral Phenomena (2407), 2736 Magnetosphere/Ionosphere Interactions (2431), 2744 Magnetotail, 2784 Solar Wind/Magnetosphere Interactions, 2788 Magnetic Storms And Substorms (7954)

Scientific paper

We will report on the conditions of thermal ions in the near-Earth magnetotail during geomagnetic storms and substorms. Using the Thermal Ion Dynamic Experiment (TIDE) measurements on the Polar spacecraft between the years of 2000 and 2005, we studied the plasma properties of thermal ions in the magnetotail at distances between 5 and 10 Earth radii as a function of solar wind conditions and geomagnetic activities. We merged over five years of high time resolution Polar/TIDE and MFE magnetic field, ACE solar wind plasma and magnetic field measurements, and geomagnetic AE, Kp and Dst indices when the Polar apogee was in the nightside. For comparison with ground observations, we use the Tsyganenko field model to map the spatial distributions of these plasma properties in the magnetospheric to the ionospheric altitudes, where the nightside auroral ovals in the northern and southern hemispheres are mostly mapped from these Polar distances. We will present statistical analyses of the spatial distributions of plasma properties of thermal ions at these altitudes and their relationships to upstream solar wind drivers and geomagnetic indices that are relevant to storm and substorm phenomena.

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