Yang et al. (2025) Impact of Localized High Temperatures on Extreme Rainfall: Insights From the July 2023 Heavy Rainfall Event in the Beijing–Tianjin–Hebei Region Over the Taihang Mountains

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

Identification

• Journal: Geophysical Research Letters
• Year: 2025
• Date: 2025-11-26
• Authors: Kun Yang, Xiaodan Guan, Xiang Zuo, Zhaokui Gao, Jin Shi
• DOI: 10.1029/2025gl117163

Research Groups

Not explicitly mentioned in the abstract.

Short Summary

This study demonstrates how antecedent high temperatures intensified moisture transport and convective activity, leading to a 22.2% increase in total rainfall during an extreme event in the Beijing–Tianjin–Hebei region, providing a new mechanism for such events.

Objective

• To investigate how antecedent heat conditions influence the intensity and distribution of subsequent extreme rainfall events.

Study Configuration

• Spatial Scale: Regional (Beijing–Tianjin–Hebei region, Taihang Mountains).
• Temporal Scale: Event-specific (July 26–27, 2023, for heat; July 29 to August 1, 2023, for rainfall).

Methodology and Data

• Models used: Numerical simulations and sensitivity experiments (specific model names not provided in the abstract).
• Data sources: Not explicitly mentioned in the abstract.

Main Results

• An antecedent heat event (July 26–27, 2023) significantly intensified moisture transport and convective activity over the Taihang Mountains, driving subsequent rainfall.
• Net moisture influx increased by 19.5% ± 24%.
• Convective intensity rose by 15% ± 13%.
• These heat-induced enhancements collectively resulted in a 22.2% ± 7% increase in total rainfall during the July 29 – August 1, 2023, extreme rainfall event.

Contributions

• Provides a new mechanism explaining the direct link between antecedent heat conditions and the intensification of subsequent extreme rainfall events, challenging previous views that treated them as opposing phenomena.

Funding

Not mentioned in the abstract.

Citation

@article{Yang2025Impact,
  author = {Yang, Kun and Guan, Xiaodan and Zuo, Xiang and Gao, Zhaokui and Shi, Jin},
  title = {Impact of Localized High Temperatures on Extreme Rainfall: Insights From the July 2023 Heavy Rainfall Event in the Beijing–Tianjin–Hebei Region Over the Taihang Mountains},
  journal = {Geophysical Research Letters},
  year = {2025},
  doi = {10.1029/2025gl117163},
  url = {https://doi.org/10.1029/2025gl117163}
}