Wave transience and wave-mean flow interaction caused by the interference of stationary and traveling waves.

Abstract

Prior to the large wave 1 amplitude growth immediately preceding the sudden warming there were two other pulses of exceptionally large wave 1 amplitude (>2000 m peak amplitude) separated by about ten days. These earlier pulses were not associated with the traveling wave. The change in the zonal wind associated with these first two pulses was much smaller. The amplitude growth during these earlier pulses did not persist as long, and was smaller in the lower stratosphere. -from Author