Martian Ionospheric and Atmospheric Interaction Under Extreme Solar Wind Conditions

Details Martian Ionospheric and Atmospheric Interaction Under Extreme Solar Wind Conditions Martian Ionospheric and Atmospheric Interaction Under Extreme Solar Wind Conditions

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufm.p13b1324m&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #P13B-1324

Physics

2431 Ionosphere/Magnetosphere Interactions (2736), 5421 Interactions With Particles And Fields, 5435 Ionospheres (2459), 5443 Magnetospheres (2756), 7974 Solar Effects

Scientific paper

As a weakly magnetized planet, Mars interacts directly with the solar wind. During periods of enhanced solar activities, solar radiation, as well as the interplanetary magnetic field (IMF), solar wind plasma density and flow speed can be greatly enhanced. The planetary particle escape rate is estimated to be more than an order of magnitude larger under extreme solar wind conditions than in normal situations. To understand the responses and its long-term consequences of the Martian ionosphere and atmosphere to extreme space weather events, we study Martian ionospheric and atmospheric interaction with extreme solar wind conditions using two sophisticated 3D models. We use a multi-species global MHD model to simulate cases with enhanced solar wind density, flow speed, magnetic field and intensity of the solar radiation, respectively to quantify the effect of each parameter and to identify the most significant one that cause the enhancement of the particle escape. A newly developed 3D test particle model, which traces the motion of pick-up ions is also used to examine the same problem based on the corresponding MHD electro-magnetic field results. The calculated ion escape fluxes for different ion species will be compared with MHD model results.

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