Cai et al. (2026) Features of Regional Compound Dry‐Hot Events Over the Yangtze River Basin in Warm Season and Related Mechanisms

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Identification

• Journal: Journal of Geophysical Research Atmospheres
• Year: 2026
• Date: 2026-09-04
• Authors: Yunfei Cai, Anning Huang, Yaocun Zhang, Lijuan Wen, Rongchang Wu, Shanshan Li, Jingwen Zeng, Ziqi Li, Yaqing Sha
• DOI: 10.1029/2026jd047324

Research Groups

• Institute of Atmospheric Physics, Chinese Academy of Sciences
• University of Science and Technology of China

Short Summary

This study explores the characteristics and mechanisms of regional compound dry-hot events over the Yangtze River Basin during warm seasons from 1961 to 2024. The results show significant increasing trends in the coverage rate, intensity, and occurrence days of these events.

Objective

• Investigate the characteristics and associated mechanisms of regional compound dry-hot events (RCDHEs) over the Yangtze River Basin (YRB) during warm seasons from 1961 to 2024.

Study Configuration

• Spatial Scale: Regional scale, focusing on the Yangtze River Basin in China.
• Temporal Scale: Daily station observations and ERA5 reanalysis data for the period of 1961–2024, with a focus on warm seasons (May to September).

Methodology and Data

• Models used: ERA5 reanalysis data.
• Data sources: Daily station observations from various weather stations within the Yangtze River Basin.

Main Results

• More than 45% of compound dry-hot event occurrence days over most YRB in warm seasons are contributed by RCDHEs, which show distinct sub-seasonal variations and concentrate in mid-June to mid-July.
• The coverage rate, intensity, and occurrence days of RCDHEs all show significant increasing trends during 1961–2024, with accelerated rates after 2000.

Contributions

• This study provides new insights into the characteristics and mechanisms of regional compound dry-hot events over the Yangtze River Basin, highlighting their increasing trends and associated synoptic patterns.
• The findings have implications for understanding the impacts of climate change on extreme weather events in this region.

Funding

• National Natural Science Foundation of China (Grant No. 41875085)
• Chinese Academy of Sciences Strategic Pilot Project (Grant No. XDA20060404)

Citation

@article{Cai2026Features,
  author = {Cai, Yunfei and Huang, Anning and Zhang, Yaocun and Wen, Lijuan and Wu, Rongchang and Li, Shanshan and Zeng, Jingwen and Li, Ziqi and Sha, Yaqing},
  title = {Features of Regional Compound Dry‐Hot Events Over the Yangtze River Basin in Warm Season and Related Mechanisms},
  journal = {Journal of Geophysical Research Atmospheres},
  year = {2026},
  doi = {10.1029/2026jd047324},
  url = {https://doi.org/10.1029/2026jd047324}
}