Guillaume‐Castel et al. (2025) ENSO Diversity Explains Interannual Variability of the Pattern Effect

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

Identification

• Journal: Geophysical Research Letters
• Year: 2025
• Date: 2025-10-16
• Authors: Robin Guillaume‐Castel, Paulo Ceppi, Joshua Dorrington, Benoît Meyssignac
• DOI: 10.1029/2025gl116952

Research Groups

[Information not available in the provided abstract.]

Short Summary

This study systematically assesses the dominant modes of sea surface temperature (SST) variability influencing the top of atmosphere energy budget. It identifies Eastern Pacific and Modoki El Niño–Southern Oscillation (ENSO) as the two leading interannual modes most relevant to the pattern effect, exhibiting distinct radiative signatures due to subtle shifts in SST anomaly locations.

Objective

• To systematically assess the dominant modes of sea surface temperature (SST) variability and their influence on the top of atmosphere energy budget and the global radiative budget (pattern effect).

Study Configuration

• Spatial Scale: Global (implied by "global radiative budget"), with a focus on regions relevant to ENSO variability (e.g., tropical Pacific).
• Temporal Scale: Interannual timescales.

Methodology and Data

• Models used: Partial Least Squares Regression (statistical method).
• Data sources: [Information not available in the provided abstract, but implied to be sea surface temperature data and top of atmosphere energy budget data.]

Main Results

• Eastern Pacific and Modoki ENSO are identified as the two leading modes of SST variability most relevant to the pattern effect at interannual timescales.
• These ENSO variants exhibit distinct radiative signatures, attributed to subtle shifts in the location of SST anomalies relative to the climatological warm pool.
• Analysis of individual ENSO events reveals that each event possesses a unique radiative signature, which depends on its evolving spatial structure.

Contributions

• Provides a systematic assessment of the dominant modes of SST variability influencing the top of atmosphere energy budget, addressing a previous gap in literature.
• Identifies Eastern Pacific and Modoki ENSO as key drivers of the pattern effect at interannual timescales, detailing their distinct radiative signatures.
• Emphasizes the critical importance of accounting for ENSO diversity to accurately understand its influence on the global energy budget.

Funding

[Information not available in the provided abstract.]

Citation

@article{GuillaumeCastel2025ENSO,
  author = {Guillaume‐Castel, Robin and Ceppi, Paulo and Dorrington, Joshua and Meyssignac, Benoît},
  title = {ENSO Diversity Explains Interannual Variability of the Pattern Effect},
  journal = {Geophysical Research Letters},
  year = {2025},
  doi = {10.1029/2025gl116952},
  url = {https://doi.org/10.1029/2025gl116952}
}