Global MHD Simulation Study of Joule Heating in the Polar Ionosphere

Details Global MHD Simulation Study of Joule Heating in the Polar Ionosphere Global MHD Simulation Study of Joule Heating in the Polar Ionosphere

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsh51b..05s&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SH51B-05

Physics

7843 Numerical Simulation Studies

Scientific paper

Energy from the solar wind is transferred to the magnetosphere and drives currents in the polar ionosphere. The resistive or Joule heating produced by these currents can be on the order of a terrawatt during an intense geomagnetic disturbance. Joule heating can change the scale height of the upper atmosphere affecting spacecraft orbits. We use a global, 3D, MHD magnetosphere model to study this process. We will show the dependence of the magnitude and spatial distribution of Joule heating on the strength and direction of the interplanetary field, the season of the year, the solar wind ram pressure, and the solar output. Work supported by the NASA LWS program and the NAVO HPC center.

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