Quantification of high latitude electric field variability

Crowley, G. and Hackert, C.L. (2001) Quantification of high latitude electric field variability. Geophysical Research Letters, 28 (14). pp. 2783-2786. ISSN 0094-8276

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Variability in the high latitude electric field has been identified as a major contributor to global Joule heating. Electric field patterns from the Assimilative Mapping of Ionospheric Electrodynamics (AMIE) procedure are used to characterize the E-field temporal variability over the course of 18 hours. The standard deviation of the E-field magnitude on May 4, 1998 often exceeds the average value of the E-field magnitude. A significant fraction of this variability arises from oscillations with period less than one hour. This confirms that Joule heating calculations based on time-averaged E-fields may significantly under-predict the heating.

Item Type:
Journal Article
Journal or Publication Title:
Geophysical Research Letters
Additional Information:
Copyright (2001) American Geophysical Union
Uncontrolled Keywords:
?? magnetometergeophysicsearth and planetary sciences(all) ??
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Deposited On:
20 Jan 2011 09:22
Last Modified:
06 Apr 2024 23:30