Boundary layer processes in the Martian magnetosphere

Details Boundary layer processes in the Martian magnetosphere Boundary layer processes in the Martian magnetosphere

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm33d..05h&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM33D-05

Physics

Plasma Physics

[5421] Planetary Sciences: Solid Surface Planets / Interactions With Particles And Fields, [5443] Planetary Sciences: Solid Surface Planets / Magnetospheres, [7829] Space Plasma Physics / Kinetic Waves And Instabilities, [7836] Space Plasma Physics / Mhd Waves And Instabilities

Scientific paper

At Mars, in the absence of a global magnetic field, the flowing solar wind interacts directly with ionized atmospheric constituents, forming an induced magnetosphere. Turbulent boundary layer processes provide one means by which solar wind and atmospheric plasma can mix and exchange momentum, potentially leading to atmospheric escape. In this presentation, we describe MGS MAG/ER observations of Martian boundary layer oscillations, identified using a combination of magnetic field and electron data. We analyze electron distributions to identify interaction regions, and utilize magnetic field data to determine wave properties and boundary position and morphology. Our observations suggest several modes of interaction, including large-scale pulsations of a relatively smooth boundary, and corrugated boundary layer structures possibly indicative of the presence of boundary instabilities. We discuss each of these modes, and the implications for atmospheric escape process.

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