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  11. Optimizing Urban Greenspace Landscapes To Mitigate Population Exposure To Extreme Heat In 21st Century Chinese Cities

Optimizing Urban Greenspace Landscapes to Mitigate Population Exposure to Extreme Heat in 21st Century Chinese Cities

Rundong Feng1,2,3, Guangdong Li1, Marina Alberti3

  • 1Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.

Environmental Science & Technology
|March 11, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

Urban greenspace (UGS) is vital for mitigating extreme heat. Enhancing UGS connectivity, not just quantity, significantly reduces high-heat exposure in Chinese cities.

Area of Science:

  • Environmental Science
  • Urban Planning
  • Climate Change Adaptation

Background:

  • Urban greenspace (UGS) is a key nature-based solution for extreme heat.
  • Quantifying the long-term potential of UGS for heat mitigation is crucial.
  • Increasing human exposure to extreme heat poses significant urban challenges.

Purpose of the Study:

  • To assess the impact of UGS on population exposure to extreme heat (high-heat exposure, HHE).
  • To explore potential spatial optimization strategies for UGS to mitigate HHE.
  • To analyze the spatiotemporal dynamics between UGS and HHE in Chinese cities.

Main Methods:

  • Utilized high spatial-temporal resolution urban land cover and population data.
  • Employed an urban climate model, machine learning, and a land use simulation model.
Keywords:
extreme heat exposurefuture projectionmitigation effectsoptimization solution

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  • Analyzed the influence of UGS quantity and spatial configuration on HHE.

    • Main Results:

    • UGS and HHE exhibit strong spatiotemporal coupling in 21st-century Chinese cities.
    • UGS shrinkage exacerbated HHE (0.58-1.15 °C), while expansion mitigated it (0.72-1.26 °C).
    • Spatial connectivity of UGS is more influential (1.3-1.8 times) than quantity in mitigating HHE.

    Conclusions:

    • Enhancing UGS spatial connectivity can mitigate HHE by 9.1-21.1%, particularly in eastern and central Chinese cities.
    • Optimizing spatial patterns of UGS is critical for effective urban heat mitigation.
    • Findings offer insights for improving climate adaptation in urban ecological design.
    urban greenspace