Li et al. (2026) Australian Rainfall Projections Associated with ENSO Diversity in a Warming Climate: Insights from CMIP6 Large Ensembles

⚠️ Warning: This summary was generated from the abstract only, as the full text was not available.

Identification

• Journal: Journal of Climate
• Year: 2026
• Date: 2026-01-16
• Authors: Huazhen Li, Andréa S. Taschetto, Christine Chung, Ghyslaine Boschat
• DOI: 10.1175/jcli-d-25-0218.1

Research Groups

Not available from the provided abstract.

Short Summary

This study investigates projected changes in Australian rainfall associated with four El Niño–Southern Oscillation (ENSO) types between historical (1945–2014) and future (2031–2100) periods under the SSP3-7.0 scenario. It finds a robust increase in El Niño frequency (especially central Pacific type) and consistent projections of increased rainfall during La Niña events, particularly between December and May, despite variability in intensity.

Objective

• To examine changes in Australian rainfall associated with eastern Pacific (EP) and central Pacific (CP) types of both El Niño and La Niña events, comparing the historical period (1945–2014) with the future period (2031–2100) under the shared socioeconomic pathway (SSP3-7.0) scenario.

Study Configuration

• Spatial Scale: Australia
• Temporal Scale: Historical (1945–2014) and Future (2031–2100) periods. Seasonal analysis (December–May).

Methodology and Data

• Models used: Four large ensemble coupled climate model simulations.
• Data sources: Climate model simulations (future projections under SSP3-7.0).

Main Results

• Models project an increased frequency of El Niño events in the future, with a robust increase in CP El Niño occurrences.
• La Niña frequency is expected to remain similar to historical levels.
• The impacts of CP and EP ENSO on Australian rainfall exhibit greater seasonal and model consistency during La Niña events than during El Niño events, in both historical and future projections.
• The most significant CP and EP ENSO–related Australian rainfall changes are projected to occur between December and May.
• While the amplitude of rainfall changes associated with El Niño types varies depending on the future ENSO pathway (weaker, unchanged, or stronger ENSO events), an overall increase in rainfall during La Niña events is consistently projected between December and May.
• Despite general agreement on the sign of La Niña rainfall projections, there is considerable variation among ensemble members regarding the intensity of the rainfall increase.

Contributions

• Underscores the value of using multiple climate models for more reliable rainfall projections.
• Provides critical insights for climate adaptation strategies in Australia.

Funding

Not available from the provided abstract.

Citation

@article{Li2026Australian,
  author = {Li, Huazhen and Taschetto, Andréa S. and Chung, Christine and Boschat, Ghyslaine},
  title = {Australian Rainfall Projections Associated with ENSO Diversity in a Warming Climate: Insights from CMIP6 Large Ensembles},
  journal = {Journal of Climate},
  year = {2026},
  doi = {10.1175/jcli-d-25-0218.1},
  url = {https://doi.org/10.1175/jcli-d-25-0218.1}
}