Physics
Scientific paper
Jul 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987p%26ss...35..959d&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 35, July 1987, p. 959-964.
Physics
Atmospheric Temperature, Equatorial Atmosphere, Middle Atmosphere, Solar Activity, Solar Terrestrial Interactions, Spectrum Analysis, Rocket-Borne Instruments, Solar Cycles, Sunspots, Vertical Distribution
Scientific paper
Autospectral and cross-spectral analyses of rocket temperature data of the middle atmosphere (20-80 km), and of sunspot number data, for the 1971-1982 period have been performed, demonstrating a response of the temperature of the middle atmosphere over the rocket launching station THUMBA to long-period events. The estimated spectra were submitted to the chi-squared test with a 90-deg confidence level at 20 deg of freedom. For the sunspot series, no quasi-periodic fluctuations were noted over the 11-year period at the chosen confidence level. Quasi-periodic temperature oscillations were, however, found: semiannual-type periodicities at 30 and 40 km, and long-periodic events and quasi-biennial oscillations at 70 km.
Devanarayanan S.
Mohanakumar K.
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