Assessment of the oceanic channel dynamics responsible for the IOD-ENSO precursory teleconnection in CMIP5 climate models

Existed studies have suggested a precursory relation between Indian Ocean Dipole (IOD) and El Niño the Southern Oscillations (ENSO) with 1-year time lag. The underlying mechanisms were attributed to atmospheric bridge and/or oceanic channel processes. In this study, dynamics in 23 climate models of Coupled Model Intercomparison Project phase 5 (CMIP5) are assessed by correlation analyses comparison observations. results show that lag correlations IOD ENSO anomalies associated significant, suggesting important role cross-basin teleconnection analyzed CMIP5 models, consistent observational analyses. comparison, highly dispersive among generally inconsistent analyses, model deficiencies. single model, different ensemble experiments, whereas those processes dispersive.