Interannual Variability in Minimum Temperatures Within the North Polar Winter Vortex
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Temparatures North Polar Winter↗
Engineering topics
Manney, G. L.
Publications and source records attributed to Manney, G. L..
Stratospheric ClO and ozone from the Microwave Limb Sounder on the Upper Atmosphere Research Satellite
Concentrations of atmospheric ozone and of ClO (the predominant form of reactive chlorine responsible for stratospheric ozone depletion) are reported for both the Arctic and Antarctic winters of the past 18 months. Chlorine in the lower stratosphere was almost completely converted to chemically reactive forms in both the northern and southern polar winter vortices. This occurred in the south long before the development of the Antarctic ozone hole, suggesting that ozone loss can be masked by influx of ozone-rich air.
Waters, J. W.↗
MLS Observations of Stratospheric Waves in Temparature and O3 During the 1992 Southern Winter
The Microwave Limb Sounder observed waves in stratospheric temperature and 03 during the 1992 southern winter.
Stratospheric Waves↗
Stratospheric Warmings During February and March 1993
Two stratospheric sudden warmings during February and March 1993 are described using UKMO analyses of height, wind and temperature, PV and diabatic heating calculted from these, and N2O from the CLAES instrument on the UARS.
stratospheric↗
Planetary-scale waves in the Southern Hemisphere winter and early spring stratosphere - Stability analysis
A barotropic stability model linearized about a zonally symmetric flow is used to examine the stability characteristics of horizontal zonal-mean flow profiles representative of the Southern Hemisphere middle stratosphere during winter and early spring, with emphasis on periods when planetary wave growth appears confined to the stratosphere. Unstable modes of eastward-travelling waves 2 and 3 are found to have period sand spatial structures, similar to observations. Wave-2 and wave-3 momentum fluxes are similar in observations and model results and are consistent with the transfer of kinetic energy from the zonal-mean flow to the wave. When a barotropic model with a zonally symmetric basic flow is used, wave 3 is usually most unstable. Including a stationary wave 1 in the basic flow destabilizes both wave 2 and wave 3, but has little effect on their periods or spatial structures. The similarity between observed fields and model results in a number of cases when wave 2 appears to grow within the stratosphere suggests that in situ instabilities play a role in the evolution of the eastward-traveling wave-2 characteristic of the Southern Hemisphere winter and early spring stratosphere.
Manney, G. L.↗
The behavior of wave 2 in the Southern Hemisphere stratosphere during late winter and early spring
The behavior of wave 2 in the Southern Hemisphere (SH) winter and early spring stratosphere has been examined in detail using 10 years of NMC data. Wave 2 is characterized by a broad meridional structure peaking between 55 and 65 S, and regular eastward propagation, with periods ranging from 5 to 40 days. The range of maximum geopotential height amplitudes is from 600 to 1000 m for a year. Consideration is also given to the relationship of wave 2 to other features of stratospheric circulation, Eliassen-Palm fluxes, and synoptic maps. The results obtained show that the zonal mean state of the SH stratosphere frequently satisfies conditions for instability. It is concluded that both instability of zonally symmetric and asymmetric states, and nonlinear interactions between wave 1 and wave 2 are of importance for determining the behavior of wave 2 in the SH winter and spring stratosphere.
Manney, G. L.↗