Geophysical Research Letters · 1978 · 24 citations · 5 references
Natural SciencesEarth SciencesMeteorologyAtmospheric RadiationAtmospheric ScienceClimatologyPlanetary WavesSolar CycleSolar RadiationSolar RotationSolar WindStratospheric MeteorologyDirect HeatingInterannual Variability In The StratospherePlanetary Wave DynamicsSolar Cycle EffectsSolar Wind VariationStratosphere-troposphere InteractionStratospheric WindsWave Model
Zonal wind variations corresponding to the sun's rotation period have been found by cross‐spectral analysis of 10.7 cm solar flux and rocketsonde data, 25‐65 km, at stations mostly near 80°W for 1960‐1976. The amplitudes of the 27‐day variation have maxima near the stratopause near 25°N and 50°N which are nearly out of phase with each other. These results are in accordance with the land‐sea heating planetary wave model recently proposed by Volland, but an alternative explanation could be direct UV heating of the upper stratosphere. Large changes are found in the 27‐day variation between periods of moderate and low solar activity.
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