Yan et al. (2025) Observational Evidences in the Effects of Large‐Scale Reforestation on Precipitation

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

Identification

• Journal: Water Resources Research
• Year: 2025
• Date: 2025-11-01
• Authors: Wenhui Yan, Fawen Li, Xiaohua Wei, Yong Zhao
• DOI: 10.1029/2025wr040446

Research Groups

[Information not available in the provided abstract.]

Short Summary

This study statistically tests the effects of large-scale reforestation on downwind precipitation using observational data from China's Loess Plateau. It reveals a significantly positive relationship between increased vegetation cover (LAI) and regional precipitation during the growing season, providing observational evidence for this effect.

Objective

• To statistically test the effects of large-scale reforestation on downwind precipitation using observational evidence, specifically in China's Loess Plateau.

Study Configuration

• Spatial Scale: China's Loess Plateau (LP) as the primary study region; effects beyond LP were also assessed.
• Temporal Scale: 1999 to 2019 (20-year period); analysis focused on growing and non-growing seasons.

Methodology and Data

• Models used: FLEXPART-WRF (for simulated moisture transport trajectories).
• Data sources: Satellite-derived forest data; precipitation observations from 274 ground stations.
• Analytical methods: Nonparametric trend tests and correlation analyses.

Main Results

• Vegetation cover in China's Loess Plateau increased significantly from 32% in 1999 to 64% in 2019.
• A significantly positive LAI-precipitation relation was observed in the Loess Plateau during the growing season, particularly in the northeastern part of the region.
• The non-growing season showed little impact on identifying this correlation.
• No significant effects of reforestation on precipitation were detected beyond the Loess Plateau region.

Contributions

• Provides statistical observational evidence validating the long-standing claim, largely based on climate models, that reforestation enhances downwind precipitation, addressing a critical call from the scientific community.

Funding

[Information not available in the provided abstract.]

Citation

@article{Yan2025Observational,
  author = {Yan, Wenhui and Li, Fawen and Wei, Xiaohua and Zhao, Yong},
  title = {Observational Evidences in the Effects of Large‐Scale Reforestation on Precipitation},
  journal = {Water Resources Research},
  year = {2025},
  doi = {10.1029/2025wr040446},
  url = {https://doi.org/10.1029/2025wr040446}
}