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Ann. Geophys., 23, 3431-3437, 2005
www.ann-geophys.net/23/3431/2005/
© European Geosciences Union 2005
Parameters of internal gravity waves in the mesosphere-lower thermosphere region derived from meteor radar wind measurements
A. N. Oleynikov1, Ch. Jacobi2, and D. M. Sosnovchik1
11Educational Res. Center of Radioengineering, Kharkiv National University of Radioengineering, 14, Lenin Av., 61166 Kharkiv, Ukraine
2University of Leipzig, Institute for Meteorology, Stephanstr. 3, 04103 Leipzig, Germany
Abstract. A procedure of revealing parameters of internal gravity waves from meteor
radar wind measurements is presented. The method is based on dividing the
measuring volume into different parts and, using wavelet analysis,
calculating the phase progression of frequency peaks in the vertical and
horizontal direction. Thus, the distribution of vertical and horizontal
wavelengths and directions of IGW energy propagation, using meteor radar
data, has been obtained. The method was applied to a 4-month data set obtained in
July and August, 1998 and 1999. As expected, the majority of waves have been
found to propagate upwards, although a considerable number seem to
propagate downwards as well. High-frequency (intrinsic periods T* of less than
2 h) waves are dominating. The distribution of waves over the course of
an average day is only weakly structured, with weak maxima in the morning
and evening.
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