Ion and Neutral Atom Outflow Structure in the High-Latitude Ionosphere

Details Ion and Neutral Atom Outflow Structure in the High-Latitude Ionosphere Ion and Neutral Atom Outflow Structure in the High-Latitude Ionosphere

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa41b1414g&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SA41B-1414

Other

2409 Current Systems (2721), 2437 Ionospheric Dynamics, 2441 Ionospheric Storms (7949), 2463 Plasma Convection (2760), 2475 Polar Cap Ionosphere

Scientific paper

Ion outflow rates from high-latitudes are highly dependent upon magnetic conditions, heating, and the recent history in the ionosphere. Outflow due to heating in the auroral oval caused by precipitation leads to local hot spots with increased ion outflows. For the heavier oxygen ions outward fluxes over areas of auroral precipitation are typically present, with downward fluxes in other areas where the heating in less. The areas of upward ion fluxes, both H+ and O+, lead to increases in the outflow of neutral stream particles produced in charge exchange reactions with the upflowing ions. Since the neutral H stream particles are light, they tend to have a vertical flux across the entire polar region, with slight increases over areas of auroral heating. The neutral O atoms, on the other hand, tend to have outward fluxes only over areas of auroral heating. However, the localized neutral O stream particle upward fluxes could contribute a significant amount of neutral O to the magnetosphere, potentially adding O+ to the ring current due to charge exchange reactions in the magnetosphere.

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