Instability theory and nonlinear evolution of blocks and mature anomalies

摘要: Publisher Summary This chapter focuses on instability theory and nonlinear evolution of blocks mature anomalies. The results the studies that indicate blocking teleconnection patterns may be generated through three-dimensional atmospheric flows are presented. properties climatological flow for Northern Hemisphere examined. It is found produces very low-frequency patterns, such as Pacific-North American North Atlantic Oscillation well medium-frequency onset modes upstream higher frequency monopole cyclogenesis modes, which have maximum amplitudes in observed storm tracks. small-amplitude perturbation to basic state, fastest growing linear mode January 1978 state obtained from a calculation quasigeostrophic model used. shift disturbance amplitude qualitatively similar corresponding experiments disturbances zonally averaged flows.