Localized and Continuous Nature of the Ionospheric Plasma Cloud Ejection: Solar Wind-Venus Global Hybrid Simulation Perspective.

Details Localized and Continuous Nature of the Ionospheric Plasma Cloud Ejection: Solar Wind-Venus Global Hybrid Simulation Perspective. Localized and Continuous Nature of the Ionospheric Plasma Cloud Ejection: Solar Wind-Venus Global Hybrid Simulation Perspective.

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsm11b..04t&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SM11B-04

Other

2459 Planetary Ionospheres (5435, 5729, 6026, 6027, 6028), 2752 Mhd Waves And Instabilities, 2753 Numerical Modeling, 2756 Planetary Magnetospheres (5443, 5737, 6030), 6295 Venus

Scientific paper

Plasma cloud ejection, the signatures of which were often detected just above the Venusian ionopause by the Pioneer Venus Orbiter, is investigated using a comprehensive global hybrid (particle ion/massless fluid electron) simulation model of the solar wind-Venus interaction with a planetary ionosphere included. The model reveals that the ejection region of plasma clouds is not smoothly distributed as that is expected from previous local simulations of the Kelvin-Helmholtz (K-H) instability, but instead is rather localized and travels tailward as time goes on. The tailward traveling of the ejection region is accompanied by the co-moving of the background field structure, and the ejected clouds carry farther away from the ionopause than those in the local K-H simulation. These results suggest that the ejection may not be controlled by the local Kelvin-Helmholtz process but affected by the other processes related to the global stream around the planet.

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