Ionospheric Outflow: Magnetospheric Consequences?

Statistics – Computation

Scientific paper

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2407 Auroral Ionosphere (2704), 2431 Ionosphere/Magnetosphere Interactions (2736), 2447 Modeling And Forecasting, 2475 Polar Cap Ionosphere

Scientific paper

An outstanding and controversial issue in space plasma physics is the composition of the magnetosphere. The two sources of magnetospheric plasma are the solar wind and the ionosphere. To lowest order, the plasmasphere is the portion of the magnetosphere that is dominated by ionospheric plasma; far outside the plasmasphere, the magnetosphere is dominated by solar wind plasma. However, there are observational measurements of ionospheric outflow into the magnetosphere at high latitudes. Moreover, a substantial part of the magnetic storm ring current is observed to be comprised of O+ which is clearly of ionospheric origin. Two questions that remain to be answered definitively are the following. What is the compositional mix of magnetospheric plasma as a function of space and time? Does ionospheric plasma in the magnetosphere impact magnetospheric dynamics? In this talk we will discuss these questions, focusing on the role of computational modeling to provide insight into their answers. Research supported by the Office of Naval Research.

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