Abstract
Nimbus 4 and 5 radiances, representing temperatures in the upper and lower stratosphere, are analyzed to obtain power and coherence squared spectra at high latitudes during the winters of both hemispheres. The spectra for zonal wavenumbers 1–3 are presented, indicating a variety of wave features which exist in the upper stratosphere. An eastward moving wavenumber 1 feature with ∼4 day period is described in greater detail; the possible nature of this wave is briefly discussed. A second wave. observed only in the Southern Hemisphere wavenumber 2 field, is found to be westward moving with period near 2.3 days.
