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Coherent Radar Estimates of Average High-latitude Ionospheric Joule Heating.

Kosch, Mike J. and Nielsen, E. (1995) Coherent Radar Estimates of Average High-latitude Ionospheric Joule Heating. Journal of Geophysical Research, 100 (A7). pp. 12201-12215. ISSN 0148-0227

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    The Scandinavian Twin Auroral Radar Experiment (STARE) and Sweden and Britain Radar Experiment (SABRE) bistatic coherent radar systems have been employed to estimate the spatial and temporal variation of the ionospheric Joule heating in the combined geographic latitude range 63.8°-72.6° (corrected geomagnetic latitude 61.5°-69.3°) over Scandinavia. The 173 days of good observations with all four radars have been analyzed during the period 1982 to 1986 to estimate the average ionospheric electric field versus time and latitude. The AE dependent empirical model of ionospheric Pedersen conductivity by Spiro et al. (1982) has been used to calculate the Joule heating. The latitudinal and diurnal variation of Joule heating as well as the estimated mean hemispherical heating of 1.7 × 1011 W are in good agreement with earlier results. Average Joule heating was found to vary linearly with the AE, AU, and AL indices and as a second-order power law with Kp. The average Joule heating was also examined as a function of the direction and magnitude of the interplanetary magnetic field. It has been shown for the first time that the ionospheric electric field magnitude as well as the Joule heating increase with increasingly negative (southward) Bz .

    Item Type: Journal Article
    Journal or Publication Title: Journal of Geophysical Research
    Additional Information: Copyright (1995) American Geophysical Union.
    Departments: Faculty of Science and Technology > School of Computing & Communications
    Faculty of Science and Technology > Physics
    ID Code: 9830
    Deposited By: Dr Steve Marple
    Deposited On: 20 Jun 2008 16:30
    Refereed?: Yes
    Published?: Published
    Last Modified: 29 Apr 2019 14:53
    Identification Number:

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