Statistical characteristic of four categories of ENSO in 24 CMIP5 models were systematically evaluated. The results got by this work are meaningful and could be a reference for the assessment of CMIP5 models. EP ENSO events  were relatively much stronger than CP ENSO events, and cold-season-matured ENSO events were relatively much more frequent than warm-season-matured ENSO events for both EP and CP ENSO events. The composite amplitudes of ENSO events in most of the models were generally weaker than in observations, particularly for EP El Ni？o and CP La Ni？a. 

Citation: Rao, J., and R.-C. Ren, 2014: Statistical characteristics of ENSO events in CMIP5 models, Atmos. Oceanic Sci. Lett., 7, doi:10.3878/AOSL 20140055.   

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Composite seasonal evolutions of (a) C-EP ENSO, (b) W-EP ENSO, (c) C-CP ENSO, and (d) W-CP ENSO in each model and in observations. The Ni？o3 indices in (a, b) were defined as the area-mean SST anomalies in the Ni？o3 region (5°S–5°N, 150–90°W), and the ENSO Modoki indices (EMI) (Ashok et al., 2007) were used in (c, d). The solid lines are for El Ni？o and the dashed lines for La Ni？a. Positive (negative) signs before months denote the year after (before) ENSO matured.