319 extreme poynting flux over the polar cap region

Monday, 11 January 2016
Michael Cook, NSF, Millersville, PA

We investigate several intervals of prolonged intervals of northward Interplanetary Magnetic Field (IMF) to describe the correlation between strong Poynting flux and northward IMF. We primarily focused on Summer events in each hemisphere when the polar regions are sunlit. During northward IMF the magnetic reconnection regions can form tailward of the magnetic cusp, while during southward IMF they form near the sub solar point. Using data from the Defense Meteorological Satellite Program (DMSP) F13, F15 and F16 spacecraft we looked for areas of strong Poynting flux over the magnetic polar cap regions. Values ranging from 20 mW/m 2 to 140 mW/m 2 were measured in narrow channels, showing there can be significant energy transport to small concentrated region near the magnetic pole. These areas are generally thought of as quiet but our result says quite the opposite under specific conditions.
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