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Thermal properties based on air temperature observations in different local climate zones in Bogotá, Colombia
Climate Research ( IF 1.1 ) Pub Date : 2020-11-05 , DOI: 10.3354/cr01619
EA Ramírez-Aguilar 1 , LCL Souza 1
Affiliation  

ABSTRACT: This paper demonstrates an early application of local climate zones (LCZs) in the city of Bogotá, Colombia. The main goal was to assess the thermal properties within the areas of influence (sectors) of 10 meteorological stations in the city, classified into the LCZ scheme. Air temperature observations at 07:00, 13:00 and 19:00 h (T7:00, T13:00 and T19:00) and daily measurements were obtained from the stations, and the maximum (Tmax), minimum (Tmin) and mean (Tmean) values were calculated. Their distribution and variation were analyzed, thermal sensation categories were calculated, and the thermal differences (ΔTLCZX-LCZD) between open-compact LCZ types and LCZD (typical rural type with low plants) were obtained in order to identify patterns between the stations and their assigned LCZs. Furthermore, we compared urban morphology (form) parameters to the ranges proposed in the literature to classify LCZs. The results clearly showed variations and patterns between the stations and their assigned LCZs when using Tmin, T7:00 and T19:00 air temperature data and the indices and categories calculated from these. Values of ΔTLCZX-LCZD > 5°C were found in the densely urbanised LCZ at night, and some negative values at noon suggested the presence of an urban cool island. The results show the usefulness of LCZs in understanding differences and temperature variations between divergent urban sectors. However, when different LCZ types are grouped, the thermal differences between them can be better appreciated and explained. The main conclusion is that the urban surface of Bogotá does not generate high temperatures, but decreases the occurrences of low values in Tmin, Tmean, T19:00 and T7:00.

中文翻译:

根据哥伦比亚波哥大不同局部气候区的气温观测得出的热性质

摘要:本文演示了哥伦比亚波哥大市局部气候区(LCZ)的早期应用。主要目标是评估城市中属于LCZ方案的10个气象站的影响范围(部门)内的热属性。在07:00、13:00和19:00 h(T 7:00T 13:00T 19:00)进行的气温观测和每日测量均从气象站获得,最大值(T max),最小值(T min)和均值(T mean)值进行了计算。分析了它们的分布和变化,计算了热感类别,并获得了开放紧凑型LCZ类型和LCZD(低植物的典型农村类型)之间的温差(ΔT LCZX-LCZD),以识别站点之间的模式及其分配的LCZ。此外,我们将城市形态(形式)参数与文献中提出的范围进行了比较,以对LCZ进行分类。结果清楚地显示了使用T minT 7:00T 19:00气温数据以及由此计算出的指数和类别时,站点及其分配的LCZ之间的变化和模式。ΔT的夜间在密集城市化的LCZ中发现LCZX-LCZD > 5°C,中午一些负值表明存在一个城市凉爽的小岛。结果表明,LCZ有助于理解不同城市部门之间的差异和温度变化。但是,将不同类型的LCZ分组时,可以更好地理解和说明它们之间的热差异。主要结论是,波哥大的城市表面不会产生高温,但会减少T minT meanT 19:00T 7:00出现低值的情况。
更新日期:2020-11-06
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