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首页> 外文期刊>Environmental Science & Technology >Cool Roofs in Guangzhou, China: Outdoor Air Temperature Reductions during Heat Waves and Typical Summer Conditions
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Cool Roofs in Guangzhou, China: Outdoor Air Temperature Reductions during Heat Waves and Typical Summer Conditions

机译：中国广州的凉爽屋顶：热浪和典型夏季条件下室外空气温度的降低

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摘要

In this paper, we simulate temperature reductions during heat-wave events and during typical summer conditions from the installation of highly reflective "cool" roofs in the Chinese megacity of Guangzhou. We simulate temperature reductions during six of the strongest historical heat-wave events over the past decade, finding average urban midday temperature reductions of 1.2 ℃. In comparison, we simulate 25 typical summer weeks between 2004 and 2008, finding average urban midday temperature reductions of 0.8 ℃, indicating that air temperature sensitivity to urban albedo in Guangzhou varies with meteorological conditions. We find that roughly three-fourths of the variance in air temperature reductions across all episodes can be accounted for by a linear regression, including only three basic properties related to the meteorological conditions: mean daytime temperature, humidity, and ventilation to the greater Guangzhou urban area. While these results highlight the potential for cool roofs to mitigate peak temperatures during heat waves, the temperature reductions reported here are based on the upper bound case, which increases albedos of all roofs (but does not modify road albedo or wall albedo).
机译：在本文中，我们通过在中国特大城市广州安装高反射率“凉爽”屋顶来模拟热浪事件和典型夏季条件下的温度降低。我们模拟了过去十年中六个最强的历史热浪事件期间的温度降低，发现城市中午平均温度降低了1.2℃。相比之下，我们模拟了2004年至2008年的25个典型夏季周，发现城市中午平均气温降低了0.8℃，这表明广州市对城市反照率的空气敏感性随气象条件而变化。我们发现，通过线性回归可以解释所有事件中气温下降幅度的大约四分之三，其中仅包括与气象条件相关的三个基本属性：平均日温度，湿度和大广州市区的通风情况区域。虽然这些结果凸显了凉爽的屋顶在热浪中减轻峰值温度的潜力，但此处报道的降温是基于上限情况，这会增加所有屋顶的反照率（但不会改变道路反照率或墙面反照率）。

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  • 来源
    《Environmental Science & Technology》 |2015年第24期|14672-14679|共8页
  • 作者

    Meichun Cao; Pablo Rosado; Zhaohui Lin; Ronnen Levinson; Dev Millstein;

  • 作者单位

    International Center for Climate and Environment Sciences, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China;

    Heat Island Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States;

    International Center for Climate and Environment Sciences, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China,Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing, 210044, China;

    Heat Island Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States;

    Heat Island Group, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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