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<p>Under global warming, understanding the impact of urbanization on the characteristics of different heatwaves is important for sustainable development. In this study, we investigated the changes of heatwaves characteristics in the Yangtze River Delta urban agglomeration (YRDUG) and analyzed the influencing mechanisms of urbanization. Results showed that: (1) the duration, frequency, and intensity of NHWs (Nighttime Heatwaves) and CHWs (Daytime-nighttime compound Heatwaves) had shown a significant increase and the CHWs showed the greatest increasing trend. Furthermore, the NHWs exhibited higher durations, frequencies, and intensities compared to DHWs (Daytime Heatwaves); (2) Since 1990, the DHWs and CHWs were greater in urban areas than in rural areas, NHWs had been more pronounced in rural areas than in urban centers; and (3) Cloud cover, solar radiation, etc. affected heatwaves. Furthermore, in the process of urbanization, the increase in impervious area and the decrease in green land exacerbated heatwaves. Considering the combined effect of DHWs and NHWs, CHWs continued to increase.</p>

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Urbanization has enhanced compound heatwaves

  • 期刊论文

  • 发表日期：

    2025年5月9日

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  • Peng Sun,
  • Shifang Yu,
  • Rui Yao,
  • Zhongbao Sun,
  • Vijay P. Singh,
  • Yaojin Bian,
  • Chenhao Ge,
  • Qiang Zhang

摘要

Under global warming, understanding the impact of urbanization on the characteristics of different heatwaves is important for sustainable development. In this study, we investigated the changes of heatwaves characteristics in the Yangtze River Delta urban agglomeration (YRDUG) and analyzed the influencing mechanisms of urbanization. Results showed that: (1) the duration, frequency, and intensity of NHWs (Nighttime Heatwaves) and CHWs (Daytime-nighttime compound Heatwaves) had shown a significant increase and the CHWs showed the greatest increasing trend. Furthermore, the NHWs exhibited higher durations, frequencies, and intensities compared to DHWs (Daytime Heatwaves); (2) Since 1990, the DHWs and CHWs were greater in urban areas than in rural areas, NHWs had been more pronounced in rural areas than in urban centers; and (3) Cloud cover, solar radiation, etc. affected heatwaves. Furthermore, in the process of urbanization, the increase in impervious area and the decrease in green land exacerbated heatwaves. Considering the combined effect of DHWs and NHWs, CHWs continued to increase.