Abstract: The major stratospheric sudden warming of February 1979 was characterized by the interaction of the zonal flow with a wavenumber 2 perturbation that was eastward traveling in the early stages of the warming, and slowed to ...

Abstract: Mesospheric horizontal wind data from the High Resolution Doppler Image (HRDI) satellite instrument are used to investigate the longitudinal variation of nontidal winds in the upper mesosphere and their relationship with ...

Abstract: A three-dimensional primitive equation model of the stratosphere is used to investigate the phenomenon of preconditioning for sudden warmings. A flow is said to be preconditioned when the stratosphere is in a state such ...

Abstract: Quasi-stationary planetary-scale longitudinal variations are found in the upper mesospheric winds measured during winter by the HRDI satellite instrument. These are negatively correlated with eddy winds in the stratosphere. ...

Abstract: Data from the LIMS instrument for January 1979 are used to provide further evidence for the often observed vacillation between the amplitudes of waves 1 and 2 in the stratosphere. The vacillation is shown to result primarily ...

Abstract: Madden and Labitzke reported an exceptionally large 18-day traveling wave 1 in the troposphere and lower stratosphere during January 1979. Observations from the LIMS instrument on Nimbus 7 indicate that during this period ...

Abstract: Satellite observations indicate that quasi-stationary planetary waves often exist to at least 100 km in the winter mesosphere. Waves are also seen in the summer upper mesosphere. A three-dimensional numerical model was ...

Abstract: A simple numerical model of the stratosphere has been used to examine the possibility that a resonant growth of wave 2 was responsible for the 1979 major sudden warning. The model solves for linear steady state solutions ...

Abstract: A calculation of the monthly mean diabatic circulation of the mesosphere is performed by using the thermodynamic and continuity equations with observed climatological data. Non-LTE CO2 cooling, ozone infrared cooling, and ...

Abstract: Three-dimensional winds derived from LIMS satellite observations for the 1978/79 winter are used to compute the mean Lagrangian motion in the winter stratosphere. Material tubes of air parcels are initialized every 4 days ...