The Replication of ENSO-related anomalies over the United States by several AMIP Models
Based on a fifty-five year period, a set of observed ENSO composites are created and compared with the ensemble mean ENSO response simulated in AMIP model runs from five different AGCMs (each made up of 9-16 members). The composites show the seasonally varying pattern of temperature and precipitation over the United States and the associated 200-hPa circulation over the PNA-region of the North Pacific Ocean and United States. The focus is on the degree to which the AMIP models capture the spatial-scale of the observed ENSO composite anomalies (i.e. their agreement and biases). Lastly, the potential forcing region and strength (“flavors”) of ENSO events will be examined.