Quantification of High Latitude Electric Field Variability

Details Quantification of High Latitude Electric Field Variability Quantification of High Latitude Electric Field Variability

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsa12a0669c&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SA12A-0669

Physics

0358 Thermosphere: Energy Deposition, 2431 Ionosphere/Magnetosphere Interactions (2736), 2463 Plasma Convection, 2712 Electric Fields (2411)

Scientific paper

The Joule heat input to the thermosphere drives the temperature, wind and compositional characteristics of the global thermosphere. The amount of Joule heating is very difficult to estimate because of a lack of measurements. It is important to estimate the temporal and spatial variability in the electric field and conductance and their contribution to Joule heating. In this paper we demonstrate the use of the Assimilative Mapping of Ionospheric Electrodynamics (AMIE) technique to estimate the temporal and spatial variability in the high latitude electric field. Temporal variations with periods of less than 10 minutes appear to contribute a similar amount of heating as longer period fluctuations. If time permits, we will also discuss the spatial variability.

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