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首页> 外文会议>Urban Environmental Pollution Conference >Urban Environmental Pollution 2013-Creating Healthy, Liveable Cities Analysis of urban heat island in Kochi, India, using a modified local climate zone classification
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Urban Environmental Pollution 2013-Creating Healthy, Liveable Cities Analysis of urban heat island in Kochi, India, using a modified local climate zone classification

机译：城市环境污染2013年 - 印度高知市区的城市热门岛屿创造健康，居住的城市分析，采用改进的本地气候区分类

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Urban Heat Island (UHI), a measure of the near surface air temperature contrast between urbanised and adjoining rural areas, is the most pronounced effect of urbanisation. The definition of 'urban' varies in different contexts, which makes it difficult for direct comparison between cities in different regions. Local climate zone (LCZ) classification based method was adopted in Kochi in Southern India to study its UHI. Twelve mobile surveys were carried out from January 2011 to March 2013 to quantify UHI intensity. Pre-dawn UHI there was more intense than early night UHI, and its intensity in winter was stronger than in summer. UHI observed during winter were 4.6 °C and 3.7 °C in pre-dawn and early night respectively. The study area was classified into ten different local climate zones based on the standard zone properties. Thermal gradient between different zones and cooling rates observed in these zones were computed, which validates the LCZ classification. Maximum intensity was seen in Compact Midrise zones which cover the central part of the city. Most intense cooling was observed in openset and sparsely built regions in all seasons. Standard zone properties alone were inadequate to explain variation of UHI intensity of same classes with different surface area and diverse adjacent zones. Two more zone properties, radial distance to adjacent zone called Zone Boundary Distance, and the Nearest Adjacent Zone, are proposed here to overcome this. The use of these additional parameters gives a better understanding of the intra zone variation of UHI intensity of the same classes with different coverage area and diverse adjacent zones.
机译：城市热岛（UHI），衡量城市化和毗邻农村地区之间的近地表空气温度对比，是城市化最明显的效果。 “城市”的定义在不同的背景下变化，这使得不同地区城市之间的直接比较难以实现。基于局部气候区（LCZ）分类的方法是在印度南部的Kochi采用了uhi的基础方法。 2013年1月至2013年3月进行了十二个移动调查，以量化UHI强度。在黎明紫外线比紫外线紫外线更激烈，其在冬季的强度比夏季强。在冬季观察的UHI分别观察到黎明前和傍晚3.7°C和3.7°C。基于标准区属性，研究区域分为十种不同的局部气候区。计算在这些区域中观察到的不同区域和冷却速率之间的热梯度，从而验证了LCZ分类。在覆盖城市中央部分的紧凑型中风区中看到了最大强度。在所有季节的Openset和稀疏的地区观察到最强烈的冷却。单独的标准区域属性不充分，以解释具有不同表面积和不同相邻区域的相同类别的UHI强度的变化。在此提出了两个更多的区域属性，到称为区域边界距离的相邻区域的径向距离，以及最近的相邻区域，以克服这一点。这些附加参数的使用可以更好地理解具有不同覆盖区域和不同相邻区域的相同类别的UHI强度的区域内变化。

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