Physics
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990jats...47.1666g&link_type=abstract
Journal of the Atmospheric Sciences (ISSN 0022-4928), vol. 47, July 1, 1990, p. 1666-1673.
Physics
30
Annual Variations, Atmospheric Temperature, Mesosphere, Satellite Observation, Solar Mesosphere Explorer, Planetary Waves, Temperature Distribution, Temperature Measurement, Vertical Distribution
Scientific paper
Observations made by the Solar Mesosphere Explorer (SME) satellite from 1982 through 1986 are used to examine the seasonal variation of temperature in the equatorial mesosphere between 58.5 and 90 km. Near the equator, seasonal variability is dominated by a strong semiannual oscillation (SAO) whose amplitude increases from about 3 K in the lower mesosphere to 7.3 K near 80 km. Above 80 k, the SAO amplitude decreases to a minimum at 83 km, but increases again sharply above that level, reaching 16.6 K at 90 km. The structure of the temperature SAO is consistent with previous observations of the SAOs in temperature and zonal wind, although the very large amplitude at 90 km may be due in part to contamination by the diurnal tide. Just below 80 km, temperatures are warm (cold) near the solstices (equinoxes), implying westerly (easterly) accelerations above; the behavior at 58.5 km lags that at 80 km by about 2 months.
Clancy Todd R.
Garcia Rolando R.
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