Normal mode Rossby waves observed in the upper stratosphere.

The results of space-time power and cross spectral analyses show the global existence of a westward traveling wave of zonal wavenumber one with a period of about five days and a westward traveling wave of zonal wavenumber two with a period of about four days. The structure and behavior of these waves are investigated by using the components of these period bands separated by a numerical band-pass filter.-from Authors