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Journal of the Meteorological Society of Japan
Properties of the quasi-stationary Rossby waves along the westerly jets are investigated with the spacetime spectral analysis of 200hPa meridional wind velocity for four regions in the Northern Hemisphere summer using ECMWF data for 1980 to 1993. The observed zonal wavenumber of eastward (westward) propagating disturbances increases (decreases) as the frequency increases. The eastward propagating disturbances are stronger than the westward propagating ones. The quasi-stationary Rossby waves aredoi:10.2151/jmsj1965.77.3_687 fatcat:vwm5y6fkgrb4nm4yyqqnrn3m5e