Standardizing thermal contrast among local climate zones at a continental scale: Implications for cool neighborhoods

Chen Xuan; Yang Jiachuan; Ren Chao; Jeong Sujong; Shi Yuan

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Standardizing thermal contrast among local climate zones at a continental scale: Implications for cool neighborhoods

机译：在大陆范围内标准化当地气候区之间的热对比：对酷社区的影响

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The Local Climate Zone (LCZ) classification system provides a standardized framework to differentiate neighbor-hoods for intra-city heat island studies. Yet the thermal contrast of air temperatures over different LCZs has not been examined at a continental scale. Using ground-based meteorological observations in 2016, here we investigated the seasonal thermal behaviors of various LCZs over China. Measured air temperatures over studied LCZs are found to have strong relations with latitude, altitude, and the distance to coastline. Thermal contrasts reduce to less than 1 degrees C in all seasons after removing the signal of background mean air temperature determined by geographical conditions. Despite the air temperature variation within individual LCZs, results reveal consistent characteristic air temperature regimes of LCZs exist at a continental scale. The warmth of built type LCZs is more evident at night, with an annual mean air temperature difference of 0.51 degrees C compared to the low plant LCZ. Among the studied LCZs, compact mid-rise neighborhoods have consistently high air temperatures throughout the year. Comparative analysis suggests that open high-rise neighborhoods are preferred over compact mid-rise and low-rise neighborhoods for sustainable city development. Our results provide useful guidance for landscape design and planning to create cool cities and neighborhoods.

机译：局部气候区（LCZ）分类系统提供了一种标准化的框架，用于区分城市内部热岛研究的邻国。然而，在大陆尺度上尚未检查不同LCZ上的空气温度的热对比。在2016年使用地面气象观测，我们在这里调查了各种LCZ的季节性热行为。测量了研究的LCZ上的空气温度与纬度，高度以及到海岸线的距离有很强的关系。在去除由地理条件确定的背景下定态的空气温度的信号之后，在所有季节中，热对比度在所有季节减少到1摄氏度。尽管单独的LCZ内的空气温度变化，结果显示了LCZ的一致特性空气温度制度以大陆尺度存在。建造型LCZ的温暖在夜间更加明显，与低植物LCZ相比，每年平均空气温度差0.51摄氏度。在研究的LCZ中，紧凑的中升社区全年都有一定的空气温度。比较分析表明，开放的高层社区是对可持续城市发展的紧凑型中升和低层社区的首选。我们的结果为景观设计和规划提供了酷炫城市和社区的有用指导。

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来源
《Building and Environment》 |2021年第6期|107878.1-107878.10|共10页
作者
Chen Xuan; Yang Jiachuan; Ren Chao; Jeong Sujong; Shi Yuan;
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作者单位

Hong Kong Univ Sci & Technol Dept Civil & Environm Engn Hong Kong Peoples R China;

Hong Kong Univ Sci & Technol Dept Civil & Environm Engn Hong Kong Peoples R China;

Univ Hong Kong Fac Architecture Hong Kong Peoples R China;

Seoul Natl Univ Grad Sch Environm Studies Dept Environm Planning Seoul South Korea;

Chinese Univ Hong Kong Inst Future Cities Hong Kong Peoples R China;

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原文格式 PDF
正文语种 eng
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关键词
Local climate zone; Microclimate; Seasonal thermal contrast; Urban heat island;

机译：局部气候区;小环脉;季节性热对比;城市热岛;

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Standardizing thermal contrast among local climate zones at a continental scale: Implications for cool neighborhoods

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