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Evaluating the impacts of land use/land cover changes and climate variations on urban heat islands using the WRF-UCM model in Hefei, China

Author

Listed:
  • Keqi Zhou

    (University of Science and Technology of China)

  • Lei Zhong

    (University of Science and Technology of China
    CAS Center for Excellence in Comparative Planetology
    Jiangsu Collaborative Innovation Center for Climate Change)

  • Zixin Wang

    (University of Science and Technology of China)

  • Jie Liu

    (University of Science and Technology of China)

  • Zhenhao Wu

    (University of Science and Technology of China)

Abstract

The urban heat island (UHI) phenomenon is concurrently influenced by urban expansion and climate change. However, the individual impacts of land use/land cover (LULC) changes and climate change remain unclear. In the present study, a high-resolution numerical Weather Research and Forecasting (WRF) model coupled with a single-layer urban canopy model (UCM) is implemented for Hefei to assess the influences of LULC and climate change simultaneously. The comprehensive increase in UHI intensity (UHII) was 0.76 K from 2003 to 2019 in the study area. The overall influence of LULC changes on the UHI effect was a 0.33 K increase in intensity and a 190 km² expansion in coverage. The results also show that the emergence of new high-intensity urban areas developed from farmlands had the strongest impact on UHI development compared to other types of LULC changes. The overall contribution of climate change to the UHII increased by 0.27 K from 2003 to 2019. The change in the storage heat flux was found to be responsible for the nocturnal UHII variation and long-term increase in the UHII, while the sensible heat flux was responsible for the diurnal UHII.

Suggested Citation

  • Keqi Zhou & Lei Zhong & Zixin Wang & Jie Liu & Zhenhao Wu, 2024. "Evaluating the impacts of land use/land cover changes and climate variations on urban heat islands using the WRF-UCM model in Hefei, China," Climatic Change, Springer, vol. 177(8), pages 1-20, August.
    • Handle: RePEc:spr:climat:v:177:y:2024:i:8:d:10.1007_s10584-024-03777-4
    DOI: 10.1007/s10584-024-03777-4
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    References listed on IDEAS

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    1. Yang Zhao & Lei Zhong & Yaoming Ma & Yunfei Fu & Mingxing Chen & Weiqiang Ma & Chun Zhao & Ziyu Huang & Keqi Zhou, 2021. "WRF/UCM simulations of the impacts of urban expansion and future climate change on atmospheric thermal environment in a Chinese megacity," Climatic Change, Springer, vol. 169(3), pages 1-17, December.
    2. Aaheim, Asbjørn & Mideksa, Torben, 2017. "Requirements to metrics of greenhouse gas emissions, given a cap on temperature," Ecological Economics, Elsevier, vol. 131(C), pages 460-467.
    3. Liu Tian & Yongcai Li & Jun Lu & Jue Wang, 2021. "Review on Urban Heat Island in China: Methods, Its Impact on Buildings Energy Demand and Mitigation Strategies," Sustainability, MDPI, vol. 13(2), pages 1-31, January.
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