Barotropic Stability of Westward-Moving Waves in Realistic Stratospheric Zonal Flows

摘要: Abstract The stability of a basic state composed westward-moving wave and zonal mean jet is examined in linearized barotropic nondivergent model on sphere. sensitivity the to strength structure emphasized. For certain waves, inclusion very weak can dramatically alter flow. Examination energetics shows that some unstable disturbances depend almost entirely variations for their existence. In cases where meridional dominate energy transfer, examination vorticity gradients useful understanding characteristics. At subcritical amplitudes, addition jet, which by itself stable, change absolute gradient resemble supercritical alone. Unstable then occur have spatial...