Jiang et al. (2026) Dampened Diurnal Cycles of Hot‐Wet Extremes in Urban Areas Contrast With Thermally Driven Daytime Stress in Rural Landscapes of Beijing‐Tianjin‐Hebei Region

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Identification

• Journal: Geophysical Research Letters
• Year: 2026
• Date: 2026-09-18
• Authors: Hanxu Jiang, Boqi Liu, Shuangmei Ma
• DOI: 10.1029/2026gl123910

Research Groups

• Institute of Atmospheric Physics, Chinese Academy of Sciences
• Beijing University

Short Summary

This study investigates hot-wet extremes (HWEs) in the Beijing-Tianjin-Hebei region and reveals urban-rural contrasts in diurnal HWEs. The research highlights the importance of considering nighttime moisture conditions in heat-risk mitigation.

Objective

• Investigate fine-scale diurnal urban-rural contrasts in hot-wet extremes

Study Configuration

• Spatial Scale: Beijing-Tianjin-Hebei region, China
• Temporal Scale: Summer observations from 2016 to 2024

Methodology and Data

• Models used: None mentioned (observational study)
• Data sources: Automatic weather stations (1,962) in urban and rural areas

Main Results

• Urban areas experience more compound day-night and independent nighttime HWEs
• Rural areas are more often affected by independent daytime days
• Temperature dominates diurnal wet-bulb temperature variability (>60%) in both environments
• Cities exhibit dampened diurnal thermal amplitudes and a larger nocturnal relative humidity contribution (∼36%)

Contributions

• This study provides new insights into the fine-scale urban-rural contrasts of hot-wet extremes, highlighting the importance of considering nighttime moisture conditions in heat-risk mitigation.

Funding

• Not specified

Citation

@article{Jiang2026Dampened,
  author = {Jiang, Hanxu and Liu, Boqi and Ma, Shuangmei},
  title = {Dampened Diurnal Cycles of Hot‐Wet Extremes in Urban Areas Contrast With Thermally Driven Daytime Stress in Rural Landscapes of Beijing‐Tianjin‐Hebei Region},
  journal = {Geophysical Research Letters},
  year = {2026},
  doi = {10.1029/2026gl123910},
  url = {https://doi.org/10.1029/2026gl123910}
}