Du et al. (2025) Regional Variability in Summer Extreme Precipitation over Northern China and Associated Atmospheric Teleconnections from 1961 to 2022

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

Identification

• Journal: Journal of Climate
• Year: 2025
• Date: 2025-10-07
• Authors: Yuchun Du, Huopo Chen
• DOI: 10.1175/jcli-d-25-0118.1

Research Groups

[Information not available in the provided abstract.]

Short Summary

This study comprehensively analyzes summer extreme precipitation in northern China from 1961 to 2022, revealing distinct regional trends and underlying atmospheric and oceanic drivers. It finds a significant increase in extreme precipitation in western northern China, while eastern northern China shows no significant changes, with different large-scale circulation patterns and North Atlantic sea surface temperature anomalies modulating each region.

Objective

• To present a comprehensive analysis of summer extreme precipitation in northern China from 1961 to 2022, emphasizing regional characteristics, temporal trends, and underlying mechanisms.

Study Configuration

• Spatial Scale: Northern China, specifically Western Northern China (WNC) and Eastern Northern China (ENC).
• Temporal Scale: 1961 to 2022 (62 years), focusing on summer extreme precipitation and trends over recent decades.

Methodology and Data

• Models used: Not explicitly mentioned in the abstract for the analysis performed.
• Data sources: Observational data (precipitation, atmospheric circulation anomalies, sea surface temperature anomalies).

Main Results

• Western Northern China (WNC) experienced a significant increase in both the amount (1.77 mm decade⁻¹) and frequency (0.19 days decade⁻¹) of summer extreme precipitation during recent decades.
• The contribution of extreme precipitation to total summer precipitation in WNC has also risen.
• Eastern Northern China (ENC) showed no significant trends in summer extreme precipitation.
• On an interannual timescale, summer extreme precipitation in WNC is influenced by the joint effects of the British–Baikal Corridor (BBC) pattern and the Silk Road pattern (SRP).
• Summer extreme precipitation in ENC is modulated by the combined influence of the Polar–Eurasian (POL) and North Atlantic Oscillation (NAO) patterns.
• Two distinct sea surface temperature (SST) patterns in the North Atlantic exert significant impacts on summer extreme precipitation in WNC and ENC, respectively.
  • The tripolar SST pattern associated with WNC summer extreme precipitation primarily influences it by triggering the BBC pattern.
  • The SST pattern linked to ENC summer extreme precipitation operates via generating the POL and NAO patterns, which work synergistically.

Contributions

• Enhances the understanding of regional variability of summer extreme precipitation in northern China.
• Provides insights into the associated atmospheric and oceanic drivers for distinct regions within northern China.
• Identifies specific large-scale atmospheric circulation patterns (BBC, SRP, POL, NAO) and North Atlantic SST patterns as key modulators of extreme precipitation in WNC and ENC.

Funding

[Information not available in the provided abstract.]

Citation

@article{Du2025Regional,
  author = {Du, Yuchun and Chen, Huopo},
  title = {Regional Variability in Summer Extreme Precipitation over Northern China and Associated Atmospheric Teleconnections from 1961 to 2022},
  journal = {Journal of Climate},
  year = {2025},
  doi = {10.1175/jcli-d-25-0118.1},
  url = {https://doi.org/10.1175/jcli-d-25-0118.1}
}