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ENSO SEASONALITY

DOI

Figure number: Figure 3.37 From the IPCC Working Group I Contribution to the Sixth Assessment Report: Chapter 3

Figure 3.37

Description:

ENSO seasonality in observations (black) and historical simulations from CMIP5 (blue; extended with RCP4.5) and CMIP6 (red) for 1951-2010. (a) Climatological standard deviation of the monthly ENSO index (SST anomaly averaged over the Niño 3.4 region; °C). Shading and lines represent 5th-95th percentiles and multi- model ensemble means, respectively. (b) Seasonality metric, which is defined for each model and each ensemble member as the ratio of the ENSO index climatological standard deviation in November-January (NDJ) to that in March-May (MAM). Each dot represents an ensemble member from the model indicated on the vertical axis. The boxes and whiskers represent the multi-model ensemble mean, interquartile ranges and 5th and 95th percentiles of CMIP5 and CMIP6 individually. The CMIP5 and CMIP6 multi-model ensemble means and observational values are indicated at the top right of the panel. The multi-model ensemble means and percentile values are evaluated after weighting individual members with the inverse of the ensemble size of the same model, so that individual models are equally weighted irrespective of their ensemble sizes. All results are based on 5-month running mean SST anomalies with triangular-weights after linear detrending.

Author list:

  • Kosaka, Y.: University of Tokyo, Japan; ykosaka@atmos.rcast.u-tokyo.ac.jp
  • McGregor, S.: Monash University, Australia
  • Cassou, C.: CNRS-Cerfacs, France
  • Kazeroni, R.: DLR, Germany

ESMValTool Branch:

ESMValCore Branch:

Recipe & diagnostics:

Recipe used: recipes/ipccwg1ar6ch3/recipe_ar6ch3_enso_cmip5+6.yml

Diagnostics used:

Expected image path:

  • recipe_ar6ch3_enso_cmip5+6_YYYYMMDD_HHMMSS/plots/enso_index/draw_enso_seasonality/enso_seasonality.pdf

Software description:

Hardware description:

Machine used: Mistral