Abstract
Gravity wave intensity and momentum fluxes in the mesosphere over Shigaraki, Japan (35°N, 136°E) during 1986–1997
Highlights
Internal gravity waves (IGWs) are very important for the dynamical regime of the middle and upper atmosphere
To ®nd seasonal variations averaged over the entire duration of the middle and upper (MU) radar observations, the daily values of the mean wind, IGW variances and momentumuxes have been averaged for each corresponding month over all years from 1986 to 1997
We have made a study of averaged seasonal variations of winductuation intensities and verticaluxes of horizontal momentum produced by IGWs at the altitudes 65±80 km using the observational data from the MU radar in 1986±1997
Summary
Internal gravity waves (IGWs) are very important for the dynamical regime of the middle and upper atmosphere. M. Gavrilov extensive studies of IGWs in the mesosphere have been performed with the middle and upper (MU) atmosphere radar at Shigaraki, Japan (35N, 136E) (Tsuda et al, 1990; Nakamura et al, 1993a, b, 1996; Gavrilov et al, 1996, 1997). Gavrilov extensive studies of IGWs in the mesosphere have been performed with the middle and upper (MU) atmosphere radar at Shigaraki, Japan (35N, 136E) (Tsuda et al, 1990; Nakamura et al, 1993a, b, 1996; Gavrilov et al, 1996, 1997) These observations use ®ve radar antenna beams simultaneously (one vertical and four oblique) and give an opportunity to study the IGW intensity and components of verticalux of horizontal momentum using traditional techniques (Vincent and Reid, 1983; Vincent and Fritts, 1987; Fukao et al, 1988). In subsequent sections we describe the method of data analysis, results of IGW studies, and undertake some discussion of the results
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