Ruster, R.Reid, I.2012-10-182012-10-181990Journal of Geophysical Research, 1990; 95(D7):10005-100160148-0227http://hdl.handle.net/2440/73625Observations of the dynamics of the mesopause region over the Norwegian island of Andøya (69°N, 16°E) made during 2 days in summer 1987 using the mobile SOUSY VHF (53.5 MHz) Doppler Radar are reported. Measurements of the three mean wind components and the 12- and 24-hour horizontal tidal components, as well as preliminary estimates of the component of the total upward flux of density-normalized horizontal momentum in the SW–NE plane and the anisotropy of the horizontal wind are presented for the 83- to 90-km height interval. Values of the component of the density-normalized flux in the SW–NE plane for the 10-min to 48-hour period range, after the 12-and-24-hour tidal components have been removed, vary from −1 m2 s−2 near 84 km to 16 m2 s−2 near 89 km. The major contribution is from the 10-min to 12-hour period range. The corresponding mean flow acceleration takes a mean value of −136 m s−1 d−1over the 83–90 km height interval. The anisotropy is considerable and may suggest the presence of standing waves.enCopyright 1990 by the American Geophysical UnionJournal article00300007952012101511463610.1029/JD095iD07p10005A1990DM736000172-s2.0-034267241964801Reid, I. [0000-0003-2340-9047]