The Role of Tropical–Extratropical Interaction and Synoptic Variability in Maintaining the South Pacific Convergence Zone in CMIP5 Models

摘要: AbstractThe South Pacific convergence zone (SPCZ) is simulated as too zonal a feature in the current generation of climate models, including those phase 5 Coupled Model Intercomparison Project (CMIP5). This bias induces errors tropical convective heating, with subsequent effects on global circulation. The SPCZ structure, particularly subtropics, governed by tropical–extratropical interaction between transient synoptic systems and mean background state. In this study, analysis variability subtropical reveals that basic mechanism generally well simulated, storms approaching along comparable trajectories to observations. However, there broad spread precipitation its across CMIP5 ensemble. Intermodel appears relate biased state which waves propagate. particular, region negative stretchin...