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Impacts of land use/ land cover types on interactions between urban heat island effects and heat waves

机译：土地利用/土地覆盖类型对城市热岛效应与热波相互作用的影响

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摘要

The urban heat island (UHI) effect is a widespread phenomenon because of increased urbanization, making the urban thermal environment less comfortable. The UHI effect may worsen during heat waves (HWs), with projected increases in extreme climatic events in the future due to global warming. Researchers have revealed interactions between the UHI effect and HWs using weather station data and proposed mitigation schemes at a city scale. However, the UHI effect in urban areas with different land use/land cover (LULC) types should respond differently to HWs, which has drawn little attention. Hence, this study conducted a mobile transect experiment in the subtropical megacity of Shenzhen and obtained high spatial resolution data. The results showed that the UHI effect was significantly amplified during HWs. The UHI intensity (UHII) of the transect increased from 0.56 +/- 0.50 degrees C under non-heat wave (NHW) conditions to 0.68 +/- 0.65 degrees C during HWs. LULC types had a significant influence on this interaction. The UHII in more urbanized areas increased during HWs, whereas less urbanized areas had improved cooling effects. These interactions were more evident at nighttime. Increasing the natural underlying surface coverage mitigated the intensity and warming potential of the UHI effect. With a 10% increase in the natural underlying surface coverage, the nighttime UHII decreased by 0.38 degrees C and 0.39 degrees C during NHWs and HWs, respectively. These cooling effects were attributed to the increased latent heat consumption during HWs by vegetation. Therefore, different measures should be taken in other areas to mitigate UHII amplification during HWs.
机译：城市热岛（UHI）效应是一种广泛的现象，因为城市化增加，使城市热环境不太舒适。紫外线效应可能在热浪（HWS）期间恶化，由于全球变暖，将来的极端气候事件中的预计增加。研究人员在城市规模上揭示了使用气象站数据的UHI效应和HWS之间的相互作用和建议的缓解方案。然而，具有不同土地使用/陆地覆盖（LULC）类型的城市地区的UHI效应应与HWS不同的反应，这令人欣慰的注意力。因此，本研究在深圳的亚热带巨型性中进行了移动横断实验，并获得了高空间分辨率数据。结果表明，在HWS期间，UHI效应显着放大。在HWS期间，横扫的UHI强度（UHII）在非热波（NHW）条件下从0.56 +/- 0.50摄氏度增加到0.68 +/- 0.65℃。 Lulc类型对这种相互作用产生了重大影响。在HWS期间，UHII在更多城市化地区增加，而较少城市化的地区具有改善的冷却效果。这些互动在夜间更明显。增加天然潜在的表面覆盖范围减轻了UHI效应的强度和温暖潜力。天然底层表面覆盖率增加10％，夜间UHII分别在NHW和HWS期间减少0.38摄氏度和0.39摄氏度。这些冷却效应归因于植被期间的潜伏在潜伏期间增加。因此，应在其他领域采取不同的措施来减轻HWS期间的UHII扩增。

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  • 来源
    《Building and Environment》 |2021年第10期|108138.1-108138.11|共11页
  • 作者

    Zou Zhendong; Yan Chunhua; Yu Leiyu; Jiang Xianchenghao; Ding Jinshan; Qin Longjun; Wang Bei; Qiu Guoyu;

  • 作者单位

    Peking Univ Sch Environm & Energy Shenzhen Grad Sch Shenzhen 518055 Peoples R China;

    Peking Univ Sch Environm & Energy Shenzhen Grad Sch Shenzhen 518055 Peoples R China;

    Peking Univ Sch Environm & Energy Shenzhen Grad Sch Shenzhen 518055 Peoples R China;

    Peking Univ Sch Environm & Energy Shenzhen Grad Sch Shenzhen 518055 Peoples R China;

    Peking Univ Sch Environm & Energy Shenzhen Grad Sch Shenzhen 518055 Peoples R China;

    Peking Univ Sch Environm & Energy Shenzhen Grad Sch Shenzhen 518055 Peoples R China;

    Peking Univ Sch Environm & Energy Shenzhen Grad Sch Shenzhen 518055 Peoples R China;

    Peking Univ Sch Environm & Energy Shenzhen Grad Sch Shenzhen 518055 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Urban heat island; Heat wave; Interactions; LULC types; Natural underlying surface; Latent heat;

    机译：城市热岛;热浪;相互作用;LULC类型;天然底层表面;潜热;

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