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On the response of fading times of upper homosphere radar echoes to solar and geomagnetic disturbances

Abstract

Four years of auroral latitude radar echo signal fading time data from the Tromsø MF radar compared with geomagnetic and solar indices yield strong evidence to suggest, although not prove, that upper mesospheric turbulence may be enhanced during periods of geomagnetic activity. We present a critique of hypotheses to explain such effects.

References

  • Briggs, B. H., The analysis of spaced sensor records by correlation techniques, Handb. MAP, 13, 166–186, 1984.

    Google Scholar 

  • Danilov, A. D., U. A. Kalgin, and A. A. Pokhunov, Variation of the mesopause level in polar regions, Space Res. XIX, 83, 173–176, 1979.

    Article  Google Scholar 

  • Gavrilov, N. M., A. H. Manson, and C. E. Meek, Climatological monthly characteristics of middle atmosphere gravity waves (10 min to 10 h) during 1979–1993 at Saskatoon, Ann. Geophys., 13, 285–295, 1995.

    Google Scholar 

  • Hall, C. M., An analogy to the Reynolds number for the neutral gas component of a weak plasma, Ann. Geophys., 19, 1–4, 2001a.

    Article  Google Scholar 

  • Hall, C. M., The Ramfjormoen MF radar (69°N, 19°E): Application development 1990–2000, J. Atmos. Solar Terr. Phys., 63, 171–179, 2001b.

    Article  Google Scholar 

  • Hall, C. M. and T. Aso, Identification of possible ion-drag induced neutral instability in the lower thermosphere over Svalbard, Earth Planets Space, 52, 639–643, 2000.

    Article  Google Scholar 

  • Hall, C. M., A. H. Manson, and C. E. Meek, Measurements of the arctic turbopause, Ann. Geophys., 16, 342–345, 1998.

    Article  Google Scholar 

  • Hocke, K. and K. Igarashi, 24- and 12-h oscillations during a time of strong eastward wind in the upper mesosphere at 31° and 45°N, J. Atmos. Solar Terr. Phys., 60, 1071–1079, 1998.

    Article  Google Scholar 

  • Hocking, W. K., The dynamical parameters of turbulence theory as they apply to middle atmosphere studies, Earth Planets Space, 51, 525–541, 1999.

    Article  Google Scholar 

  • Holdsworth, D. A., R. A. Vincent, and I. M. Reid, Mesospheric turbulent velocity estimation using the Buckland Park MF radar, Ann. Geophys., 2001 (in press).

  • Jacobs, J. A., Geomagnetism Volume 3, 533 pp., Academic Press, London, 1989.

    Google Scholar 

  • Luo, Y., A. H. Manson, C. E. Meek, K. Igarashi, and Ch. Jacobi, A quasi 27-day oscillation in the mesospheric and lower thermospheric wind: Observations in Europe, Japan and Canada, Report #1 Atmospheric Dynamics Group, University of Saskatchewan, Canada, 31 pp., 2000.

    Google Scholar 

  • Manson, A. H. and C. E. Meek, Comparisons between neutral winds near 100 km at Saskatoon (52°N, 107°W, L= 4.4) and variations in the geomagnetic field (1979-1983), Ann. Geophys., 4, 281–286, 1986.

    Google Scholar 

  • Manson, A. H. and C. E. Meek, Small-scale features in the middle atmosphere wind field at Saskatoon, Canada (52°N, 107°W): An analysis of MF radar data with rocket comparisons, J. Atmos. Sci., 44, 3661–3672, 1987.

    Article  Google Scholar 

  • Meek, C. E., An efficient method for analysing ionospheric drifts data, J. Atmos. Terr. Phys., 42, 835–839, 1980.

    Article  Google Scholar 

  • Meek, C. E., Triangle size effect in spaced antenna wind measurements, Radio Sci., 25, 641–648, 1990.

    Article  Google Scholar 

  • Nozawa, S., A. Brekke, A. H. Manson, C. M. Hall, C. E. Meek, K. Morise, S. Oyama, K. Dobashi, and R. Fujii, A comparison study of the auroral E region neutral winds derived by the EISCAT UHF radar and the Tromsø MF radar, J. Geophys. Res., 2001 (in press).

  • Xu, J., A. K. Smith, and G. P. Brasseur, Conditions for the photochemical destabilization of gravity waves in the mesopause region, J. Atmos. Solar Terr. Phys., 63, 1821–1829, 2001.

    Article  Google Scholar 

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Hall, C.M., Nozawa, S., Meek, C.E. et al. On the response of fading times of upper homosphere radar echoes to solar and geomagnetic disturbances. Earth Planet Sp 54, 699–705 (2002). https://doi.org/10.1186/BF03351721

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  • DOI: https://doi.org/10.1186/BF03351721

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