Reversed ionospheric convections during November 2004 storm and the impact on the upper atmosphere

Details Reversed ionospheric convections during November 2004 storm and the impact on the upper atmosphere Reversed ionospheric convections during November 2004 storm and the impact on the upper atmosphere

May 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agusmsa54a..06d&link_type=abstract

American Geophysical Union, Spring Meeting 2008, abstract #SA54A-06

Physics

2411 Electric Fields (2712), 2427 Ionosphere/Atmosphere Interactions (0335), 2431 Ionosphere/Magnetosphere Interactions (2736), 2463 Plasma Convection (2760), 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

The Assimilative Mapping of Ionospheric Electrodynamics (AMIE) procedure is applied to study November 2004 geomagnetic storm, particularly the period of 2000-2400UT on November 9th. During this time interval, IMF Bz was strongly northward while the solar wind pressure was relatively high, a favorable condition for forming reversed plasma convection in the polar regions. Indeed, the AMIE results show strong reversed convections for a long period (more than 1 hour) in both hemispheres, which have rarely been observed. To understand the physical mechanism, numerical simulations of the magnetospheric dynamics are carried out using the Lyon- Fedder-Mobarry (LFM) MHD model. The impact on the thermospheric neutral wind and density is also examined using the NCAR-TIEGCM, and the simulated results will be compared with the CHAMP satellite observations.

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