Paper Overview
- Field: Machine Learning
- Authors: Anran Wang, Wen Shi, Yong Luo, Jianbin Huang, Lijuan Chen, Junhu Zhao, Weixin Jin, Huihui Yuan
- Published: 2026-08-19
- arXiv: 2608.19163
- Predictions initialized from March to May consistently indicate a dry anomaly over central China in summer 2026.
- Retrospective evaluations revealed higher predictive skill in analogue years, which also tended to feature central equatorial Pacific warming persisting from the preceding winter into summer.
- This warming favors an anomalous cyclonic circulation over the western North Pacific-South China Sea-South China region, which induces northerly winds and moisture divergence that jointly suppress rainfall over central China.
- Layer-wise relevance propagation (LRP) independently identified these northerly winds as the dominant driver among all model inputs.
- Perturbation tests support the attribution: removing the LRP-identified features effectively eliminates the dry anomaly.
Summary
Seasonal precipitation anomalies are largely regulated by atmospheric circulation, which dynamical models predict with greater reliability than precipitation itself. This work employs a deep learning model that translates dynamical circulation predictions into precipitation estimates.
Key Findings
Significance
The framework provides a physically interpretable explanation for AI-derived regional climate predictions, enabling evidence-based evaluation before observational data become available.
Abstract (from paper)
> Seasonal precipitation anomalies are largely regulated by atmospheric circulation, which dynamical models predict with greater reliability than precipitation itself. Here, we employ a deep learning model that translates dynamical circulation predictions into precipitation estimates. Predictions initialized from March to May consistently indicate a dry anomaly over central China in summer 2026. Retrospective evaluations revealed higher predictive skill in the analogue years, which also tended to feature central equatorial Pacific warming persisting from the preceding winter into summer. This warming favors an anomalous cyclonic circulation over the western North Pacific-South China Sea-South China region, which induces northerly winds and moisture divergence that jointly suppress rainfall...