Wang et al. (2026) Contributions of Extreme and Nonextreme Precipitation to the Post-1993 Interdecadal Increase in Summer Rainfall over Southern China

Identification

• Journal: Journal of Climate
• Year: 2026
• Date: 2026-07-08
• Authors: Yue Wang, X T Li, Ming Luo, Zhen Liu
• DOI: 10.1175/jcli-d-25-0605.1

Research Groups

• State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences
• School of Earth and Space Sciences, University of Science and Technology of China
• Department of Atmospheric and Oceanic Sciences, Nanjing University

Short Summary

This study investigates the contributions of extreme and nonextreme precipitation to the post-1993 interdecadal increase in summer rainfall over southern China. The results show that both types of precipitation events have contributed to the increase, but with different mechanisms.

Objective

• Investigate the role of extreme and nonextreme precipitation events in the post-1993 interdecadal increase in summer rainfall over southern China

Study Configuration

• Spatial Scale: Southern China
• Temporal Scale: Post-1993 interdecadal period

Methodology and Data

• Models used: ERA5 global reanalysis data
• Data sources: Satellite, observation, and reanalysis datasets

Main Results

• Extreme precipitation events have contributed to the increase in summer rainfall over southern China through changes in the western Pacific subtropical high (WPSH) activity.
• Nonextreme precipitation events have also contributed to the increase, but through changes in the tropical cyclone (TC) frequency.

Contributions

• This study provides new insights into the mechanisms driving the post-1993 interdecadal increase in summer rainfall over southern China.
• The results highlight the importance of considering both extreme and nonextreme precipitation events in understanding climate variability.

Funding

• National Natural Science Foundation of China (Grant No. 41875063)
• Chinese Academy of Sciences (CAS) Strategic Priority Research Program (Grant No. XDA2006040303)
• University of Science and Technology of China (USTC) Youth Fund (Grant No. KY2030000012)

Citation

@article{Wang2026Contributions,
  author = {Wang, Yue and Li, X T and Luo, Ming and Liu, Zhen},
  title = {Contributions of Extreme and Nonextreme Precipitation to the Post-1993 Interdecadal Increase in Summer Rainfall over Southern China},
  journal = {Journal of Climate},
  year = {2026},
  doi = {10.1175/jcli-d-25-0605.1},
  url = {https://doi.org/10.1175/jcli-d-25-0605.1}
}