The steep increase in urban populations results in the spatial extent of cities expanding both horizontally and vertically. The climatic response of urban areas differs greatly to rural areas exposed to the same environmental conditions, with urban temperatures generally being higher, particularly in the late afternoon and evening. Coupled with the upward trend in global temperatures, urban heating can be classified as an atmospheric hazard that affects a high proportion of the population in some countries, which needs to be addressed through local and national government planning strategies. This study presents preliminary findings from a city scale urban climate model developed using the fast climate modelling tool ADMS-Urban for the city of Kuala Lumpur, Malaysia, which is known to suffer from substantial urban heating, and discusses the extent and intensity of the urban heat island in light of existing literature based on field measurements. The model has been configured to use surface characteristic data derived from land-use data as input, and through comparison with temperature variations derived from satellite imagery, the model is seen to clearly capture the spatial variation of temperature over the domain. The urban heat island intensities predicted by the model are comparable to the values reported in literature. This study also demonstrates the strong relationship between temperatures and wind speed, which is generally much lower in tropical Kuala Lumpur compared to mid-latitudes, and the urban heat island intensity and nocturnal cooling. The future modelling studies should account for anthropogenic heating, for instance, from air conditioning units and traffic, which are important sources of heat in tropical areas, and expand more on building materials and morphology for a thorough appraisal of urban heating in Kuala Lumpur.

中文翻译：

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热带城市的城市热岛建模：以吉隆坡为例

城市人口的急剧增加导致城市在空间上水平和垂直扩展。城市地区的气候响应与暴露于相同环境条件的农村地区差异很大，城市温度通常较高，尤其是在傍晚和傍晚。加上全球气温上升趋势，城市供暖可被归类为一种大气危害，在某些国家影响很大比例的人口，这需要通过地方和国家政府的规划策略加以解决。这项研究提出了使用快速气候建模工具ADMS-Urban为马来西亚吉隆坡市开发的城市规模城市气候模型的初步发现，众所周知，该城市遭受着严重的城市供暖之苦，并根据实地测量的现有文献讨论了城市热岛的范围和强度。该模型已配置为使用从土地利用数据中获得的地表特征数据作为输入，并且通过与从卫星图像中获得的温度变化进行比较，可以看到该模型清楚地捕获了整个区域温度的空间变化。该模型预测的城市热岛强度与文献报道的值相当。这项研究还证明了温度和风速之间的密切关系，与中纬度地区相比，热带吉隆坡通常要低得多，而城市热岛强度和夜间降温则要低得多。未来的模型研究应考虑人为加热，例如，