Long term periodicities in lower thermospheric wind variations

Long-term observations of mean winds and tides in the upper mesosphere and lower thermosphere above Scott Base, Antarctica

“…Heiss Island, D2 811N, 581E 1965-1985Portnyagin et al (1993a, b) Obninsk, D2 551N, 381E 1964-1995Portnyagin and Solovjova (2000 Kuehlungsborn, D1 541N, 121E 1964-1994Bremer et al (1997) Kuehlungsborn, D2 541N, 121E 1976-1994Bremer et al (1997) Saskatoon, PR 521N, 1071W 1979-1988Namboothiri et al (1993) UK, D2 521N, 21W 1988-2000Middleton et al (2002) Collm, D1 511N, 131E 1964-1994Bremer et al (1997) Atlanta, D2 341N, 841W 1975-1986Bremer et al (1997) Adelaide, PR 351S, 1381E 1984-1995Vincent et al (1998) Christchurch, PR 441S, 1731E 1978-1986Fraser (1990) 1987-2003Unpublished Molodezhnaya, D2 681S, 451E 1967-1986Portnyagin et al (1993a, b) Scott Base, PR 781S, 1671E 1982-1984…”

A long-term comparison of mesopause region wind measurements over Eastern and Central Europe

“…Results from long-term analyses of mesopause region monthly mean winds and tides, besides an annual and semiannual cycle, have shown that the relevant time scales are interannual (Portnyagin et al, 1993a, b) as well as decadal or even interdecadal (D'Yachenko et al, 1986). However, only a few wind time series are long enough to investigate the possible periodicities and most of the long-term results refer to one station only; so it remains unclear whether the results are valid on a global or hemispheric scale.…”

On the solar cycle dependence of winds and planetary waves as seen from mid-latitude D1 LF mesopause region wind measurements

“…Analyses of the Obninsk D2 long-term measurements were also presented by D'Yachenko et al (1986), who pointed out that oscillations with a period of 11 years were present within the time series of the prevailing wind and the semidiurnal tidal amplitude. Another study was carried out by Dartt et al (1983), who, using data from di erent stations at northern middle latitudes, qualitatively con®rmed the results of Sprenger and Schminder (1969) concerning the solar cycle dependence of the winter prevailing wind.…”