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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 16, issue 12
Ann. Geophys., 16, 1607–1618, 1998
https://doi.org/10.1007/s00585-998-1607-3
© European Geosciences Union 1998
Ann. Geophys., 16, 1607–1618, 1998
https://doi.org/10.1007/s00585-998-1607-3
© European Geosciences Union 1998

  31 Dec 1998

31 Dec 1998

Spectral characteristics of spring arctic mesosphere dynamics

C. M. Hall1, A. H. Manson2, and C. E. Meek2 C. M. Hall et al.
  • 1The Auroral Observatory, Department of Physics, University of Tromsø, 9037 Tromsø, Norway
    e-mail chris.hall@phys.uit.no
  • 2Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, Saskatchewan, Canada

Abstract. The spring of 1997 has represented a stable period of operation for the joint University of Tromsø / University of Saskatchewan MF radar, being between refurbishment and upgrades. We examine the horizontal winds from the February to June inclusive and also include estimates of energy dissipation rates derived from signal fading times and presented as upper limits on the turbulent energy dissipation rate, ε. Here we address the periodicity in the dynamics of the upper mesosphere for time scales from hours to one month. Thus, we are able to examine the changes in the spectral signature of the mesospheric dynamics during the transition from winter to summer states.

Key words. Meteorology and atmospheric dynamics (middle atmosphere dynamics; turbulence; waves and tides).

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