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<p>Peri-urban vegetation influences urban hydroclimates, yet its role in shaping urban precipitation remains understudied due to binary urban–non-urban framings, the limited representation of peri-urban landscapes in models and datasets, and a predominant focus on intra-urban areas. Here we integrate satellite-derived vegetation trends with an evapotranspiration model and an atmospheric moisture-tracking model to quantify how peri-urban vegetation change affects urban precipitation within 1,029 cities worldwide. We identify a spatially coupled hydroclimatic mechanism in which vegetation-driven shifts in peri-urban evapotranspiration modulate urban precipitation via atmospheric moisture transfer. Although these changes contribute only 1.9% of annual urban precipitation, they account for 18.3% of its long-term increase, indicating a disproportionate and systematic influence on urban hydroclimate trajectories. We further find that this coupling strengthens in cities with more abundant surrounding vegetation, wind-aligned greening and lower background humidity. Our findings clarify how peri-urban land–atmosphere interactions regulate urban climates and highlight the need to integrate peri-urban ecosystems into climate-resilience planning.</p>

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Uncovering the hidden role of peri-urban vegetation in modulating urban precipitation

  • 期刊论文

  • 发表日期：

    2026年3月30日

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  • Rui Shao,
  • Jiaqi Li,
  • Weiwei Shao,
  • Yicheng Wang,
  • Dawen Yang,
  • Guangheng Ni,
  • Yuting Yang,
  • Zhiyong Yang,
  • Jiahong Liu,
  • Yong Zhao,
  • Jianhua Wang,
  • Hao Wang

摘要

Peri-urban vegetation influences urban hydroclimates, yet its role in shaping urban precipitation remains understudied due to binary urban–non-urban framings, the limited representation of peri-urban landscapes in models and datasets, and a predominant focus on intra-urban areas. Here we integrate satellite-derived vegetation trends with an evapotranspiration model and an atmospheric moisture-tracking model to quantify how peri-urban vegetation change affects urban precipitation within 1,029 cities worldwide. We identify a spatially coupled hydroclimatic mechanism in which vegetation-driven shifts in peri-urban evapotranspiration modulate urban precipitation via atmospheric moisture transfer. Although these changes contribute only 1.9% of annual urban precipitation, they account for 18.3% of its long-term increase, indicating a disproportionate and systematic influence on urban hydroclimate trajectories. We further find that this coupling strengthens in cities with more abundant surrounding vegetation, wind-aligned greening and lower background humidity. Our findings clarify how peri-urban land–atmosphere interactions regulate urban climates and highlight the need to integrate peri-urban ecosystems into climate-resilience planning.