Interannual variability in a tropical atmosphere−ocean model: influence of the basic state, ocean geometry and nonlinearity

摘要: Abstract The behavior of a tropical coupled atmosphere/ocean model is analyzed for range different background states and ocean geometries. essentially that Cane Zebiak the Pacific, except only temporally constant are considered here. For realistic geometry, solutions feature oscillations period 3–5 yr. By comparing full solution with linearized version model, it shown basic mechanism oscillation contained within linear theory. A simple analog derived describes nature interannual variability in atmosphere–ocean system. highlights properties produce instability eastern basin, equatorial wave dynamics western basin responsible delayed, negative feedback into this growth. growth rate local instabil...