Analysis of temperature variability within outdoor urban spaces at multiple scales

Spatial planning for urban ventilation corridors by urban climatology

“…In addition, the ventilation potential index can also affect the heat island intensity index. As shown in Figure 10, the average temperature dropped from 20.00 to 18.79°C in the urban area, which is most likely because ventilation potential index such as building density also affect surface temperature (Pacifici, Rama, and de Castro 2019;Yin et al 2018). In general, when the ventilation potential index is high, the wind speed will increase and the heat island intensity index will decrease.…”

“…For example, it has been shown that building height variations can be beneficial in terms of breathability levels (Chen et al 2017;Wen, Juan, and Yang 2017), while larger aspect ratios of urban canyons can lead to higher pollutant concentrations inside the street (He, Ding, and Prasad 2019;Kruger, Minella, and Rasia 2011;Liu, Leung, and Barth 2005). The impact of meteorological parameters, such as wind speed, wind direction, temperature, and humidity are also extremely important for urban ventilation (Lau and Ngan 2018;Pacifici, Rama, and de Castro 2019;Ren et al 2018). Furthermore, the actual pollutant concentration at street level has been found to be strongly linked to meteorological parameters (Kubilay et al 2017;Yuan et al 2019).…”

A Cross-Scale Analysis of the Correlation between Daytime Air Temperature and Heterogeneous Urban Spaces

“…Secondly, thermal variations are relatively inconspicuous in evenly distributed building clusters, which were the main concern of previous research [34][35][36][37][38][39]. However, thermal variations can be more evident in some modern urban fabrics, such as isolated high-rise building clusters [32]. Although these kinds of urban fabrics have been somewhat studied [22,23], there is still a lack of targeted investigations.…”

“…Every built element induces its own microclimate around it so that temperature varies in outdoor spaces, even at short distances [31]. It has been observed that high-rise buildings induce various surrounding microclimates due to the effect of shadow projections [32]. Temperatures on the leeward side of buildings are generally lower than those on the windward side because of shading and small advective effects [33].…”

“…Urban morphological parameters and how they affect the urban thermal environment on the macro-and mesoscales have been extensively studied, as evidenced by works such as [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. However, fewer studies are available on the relationship between urban morphology and the urban thermal environment on the microscale [32,33], which may be explained by the following two reasons.…”