A Set of Empirical Models of the High-Latitude Magnetosphere-Ionosphere Energy Transfer Based on Dynamic Explorer 2 Data

Details A Set of Empirical Models of the High-Latitude Magnetosphere-Ionosphere Energy Transfer Based on Dynamic Explorer 2 Data A Set of Empirical Models of the High-Latitude Magnetosphere-Ionosphere Energy Transfer Based on Dynamic Explorer 2 Data

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa13a0259m&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SA13A-0259

Physics

2407 Auroral Ionosphere (2704), 2411 Electric Fields (2712), 2431 Ionosphere/Magnetosphere Interactions (2736), 2447 Modeling And Forecasting

Scientific paper

Electric current flowing through the high-latitude upper atmosphere produces a significant amount of Joule heating. Numerical models of the upper atmosphere require accurate information about how this heating varies with latitude, longitude, altitude, and time under different solar-wind conditions. Detailed statistical analysis of satellite and ground-based measurements of the ionosphere and its electric fields, currents, and auroral particles can provide this information. We are analyzing measurements from the Dynamic Explorer-2 satellite mission to quantify the magnetosphere-ionosphere energy transfer. The dependence of high latitude energy input on the magnitude and orientation of the interplanetary magnetic field, as well as on season, latitude, and magnetic local time is examined. A set of simplified and consistent empirical models of the Poynting flux, the electric field, and the magnetic potential are developed by fitting the data to the different parameters. These simplified models of the high latitude energy transfer are being implemented into a general circulation model of the upper atmosphere.

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