Abstract
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 the regular westward phase regression extended upward as far as the lower. mesosphere. Alternate destructive and constructive interference between the transient wave and the time mean wave 1 resulted in large variations in wave amplitude with time. Analysis of the zonal wind deceleration during the minor sudden warming of that month indicates that this wave 1 transience was the primary cause of the warming. Prior to the large wave 1 amplitude growth immediately preceding the sudden warming (18-22 January), there were two other pulses of exceptionally large wave 1 amplitude (>2000 m peak amplitude) separated by about ten days. Thew earlier pulses were not associated with the traveling wave, which first appeared around 10 January. The change in the zonal wind associated with these...
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