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Use of Satellite Images to Determine the Temperature of Urban Surfaces for Landscape Management Purposes, Case Study Bratislava (Slovak Republic)

Author

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  • Martin Šalkovič

    (Department of Environmental Ecology and Landscape Management, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, 842-15 Bratislava, Slovakia)

  • Eva Pauditšová

    (Department of Environmental Ecology and Landscape Management, Faculty of Natural Sciences, Comenius University in Bratislava, Ilkovičova 6, 842-15 Bratislava, Slovakia
    Institute of Management, Slovak University of Technology, Vazovova 5, 812-43 Bratislava, Slovakia)

Abstract

This contribution deals with the use of data obtained from Landsat 8 satellite imaging to identify surface temperature variability in the example of the city of Bratislava, with an emphasis on identifying hotspots outside the built-up area, for example, on agricultural land—locations which are part of the European Network of Protected Areas. Surface temperature variability is presented in two time periods, on the daytime image taken on 26 July 2021 and on the nighttime image from 28 June 2021. Surface temperature is projected in a profile cut of the area. It vertically illustrates the temperatures of individual types of surfaces. Surfaces are classified by Urban Atlas classes. Areas reflecting the spatial distribution of the residential development in the city of Bratislava have been identified by satellite images in the studied area, and they represent a phenomenon of the urban heat island. Such areas were also identified outside the built-up area, in agricultural areas. The results of our research show that it is important to deal with UHI outside the built-up areas of cities and to orient the attention the territory planning and also to the proposal of measures for the management of these areas. Especially if these areas also include territories of the European system of protected areas, as it is in the case of Bratislava city (e.g., SPA029 Sysľovské polia). The results of reducing the impacts of climate change in cities concern not only the residents. In spatial planning, it is also necessary to address the management of non-built-up areas—localities with a quasi-natural character (e.g., areas with diverse vegetation cover). In order to recognize UHI within residential areas, it is essential to identify areas with significant differences between daytime and nighttime surface temperatures. Large differences between night and daytime surface temperatures can be seen in areas outside the built-up area in Bratislava on arable land where the difference is up to 8.0 °C (in the continuous housing class where the proportion of impermeable surfaces is higher than 80% with a temperature difference of 7.6 °C). Identification of overheated surfaces in the territory makes an important basis for modification of the landscape management and management of nature protection areas. It is important to propose measures related to the reduction in the negative impacts of climate change on the landscape and biodiversity.

Suggested Citation

  • Martin Šalkovič & Eva Pauditšová, 2023. "Use of Satellite Images to Determine the Temperature of Urban Surfaces for Landscape Management Purposes, Case Study Bratislava (Slovak Republic)," Land, MDPI, vol. 12(2), pages 1-18, January.
  • Handle: RePEc:gam:jlands:v:12:y:2023:i:2:p:384-:d:1052590
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    References listed on IDEAS

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    1. Florian Steigerwald & Meinolf Kossmann & Heike Schau-Noppel & Saskia Buchholz & Oleg Panferov, 2022. "Delimitation of Urban Hot Spots and Rural Cold Air Formation Areas for Nocturnal Ventilation Studies Using Urban Climate Simulations," Land, MDPI, vol. 11(8), pages 1-23, August.
    2. Han Xiao & Monika Kopecká & Shan Guo & Yanning Guan & Danlu Cai & Chunyan Zhang & Xiaoxin Zhang & Wutao Yao, 2018. "Responses of Urban Land Surface Temperature on Land Cover: A Comparative Study of Vienna and Madrid," Sustainability, MDPI, vol. 10(2), pages 1-19, January.
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