Abstract
Abstract. Temperature increases in cities affects inhabitants’ quality of life, justifying the extent of research focusing on identifying, analysing, and assessing the relationship between the density of urban fabric represented by land cover/land use (LC/LU) classes and manifestation of the urban heat island (UHI) phenomenon. This paper delimits LC/LU classes for the urban Bratislava (2,117 ha of class 12110 dominated in 2016) and Trnava (598 ha of class 12120 dominated in 2016). The greatest median air temperature over 33 °C (at 18:00) was derived with the MUKLIMO model for the class Continuous urban fabric with the sealing degree > 80% in Bratislava. The graphic outputs improve our perception and evaluation of the LC/LU and UHI relationship. The information potential of the graphical outputs may increase through use of computer animations to represent the temperature changes during day or the temperature changes among years.
Highlights
Big cities are, and will continue to be, ever more exposed to the risk of increasing surface and air temperatures resulting from the replacement of natural landscapes with artificial construction materials, namely concrete and asphalt (Feranec et al, 2019)
Temperature changes in a densely built-up urban environment are associated with the urban heat island (UHI) phenomenon that occurs in urban areas and is generally distinguished by both higher surface and air temperatures (Yow, 2007) compared to the surrounding rural landscape (Oke, 1995; Weng, 2011; Lauriola, 2016)
The aim of this paper is to demonstrate some of the results obtained through the Effect of impermeable soil cover on urban climate in the context of climate change project supported by the Slovak Research and Development Agency (SRDA) that emphasized:
Summary
Will continue to be, ever more exposed to the risk of increasing surface and air temperatures resulting from the replacement of natural landscapes with artificial construction materials, namely concrete and asphalt (Feranec et al, 2019). The physical properties of construction materials (greater solar radiation accumulation than the reflection, greater heat capacity and conductivity) and population growth are directly associated with increasing city temperatures. Temperature changes in a densely built-up urban environment are associated with the urban heat island (UHI) phenomenon that occurs in urban areas and is generally distinguished by both higher surface and air temperatures (Yow, 2007) compared to the surrounding rural landscape (Oke, 1995; Weng, 2011; Lauriola, 2016). Solving the UHI problem may contribute to improved quality of life in cities, and to energy saving (air conditioning and other cooling systems improving the living comfort) (Feranec et al, in print)
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