Shen et al. (2026) Irrigation Impact on Humid Heat Stress: Divergent Metrics, Vegetation Dynamics, and Future Worsening

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

Identification

• Journal: Geophysical Research Letters
• Year: 2026
• Date: 2026-08-30
• Authors: Hanjie Shen, Yuwen Fan, Jina Hur, Eun‐Soon Im
• DOI: 10.1029/2026gl123720

Research Groups

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

Short Summary

This study investigates the impact of irrigation on heat comfort in the North China Plain under global warming using a high-resolution weather model with improved crop systems.

Objective

• Investigate how irrigation affects humid heat stress under global warming conditions.

Study Configuration

• Spatial Scale: The study focuses on the North China Plain, a region prone to heat stress and irrigation.
• Temporal Scale: The analysis is conducted for summer months (June-August) with a focus on 2020-2039 period under SSP5 scenario.

Methodology and Data

• Models used: WRF model with improved crop systems.
• Data sources: Reanalysis data from ERA5, satellite observations of temperature and relative humidity.

Main Results

• Wet-bulb temperature (TW) increases due to humidification on dry-heat days, while simplified wet-bulb globe temperature (SW) decreases due to cooling on wet-heat days.
• Both heat stress changes are worsened under SSP5 scenario.
• Omitting dynamic vegetation results in noticeable underestimation of irrigation response.

Contributions

• This study highlights the importance of considering dynamic vegetation and improved crop systems when modeling irrigation impacts on heat comfort.
• The findings suggest that while irrigation alters temperature and relative humidity, its combined effect on humid heat stress is insignificant compared to global warming.

Funding

• National Natural Science Foundation of China (Grant No. 41975149)
• Key Research Program of Frontier Sciences, Chinese Academy of Sciences (Grant No. QYZDY-SSW-DQC012)

Citation

@article{Shen2026Irrigation,
  author = {Shen, Hanjie and Fan, Yuwen and Hur, Jina and Im, Eun‐Soon},
  title = {Irrigation Impact on Humid Heat Stress: Divergent Metrics, Vegetation Dynamics, and Future Worsening},
  journal = {Geophysical Research Letters},
  year = {2026},
  doi = {10.1029/2026gl123720},
  url = {https://doi.org/10.1029/2026gl123720}
}