Vpliv rabe tal na pojavljanje urbanih toplotnih otokov v Sloveniji

Simčič, Anica (author), Kobal, Milan (mentor)

Urbani toplotni otoki so rezultat antropogenega delovanja v mestnih območjih in predstavljajo temperaturno razliko med urbano in ruralno krajino. Kot urbane toplotne otoke smo v tej raziskavi določili tista območja, znotraj katerih je temperatura površja najtoplejše četrtine leta višja vsaj za 0,1 °C od temperature okolice, velikost območja pa je večja od 50 ha. Analizirali smo urbane toplotne otoke različnih velikosti in različnih rab tal (kmetijska, pozidana, zelena in gozdna raba tal, vodna telesa). Obravnavali smo vpliv rabe tal (delež gozdov, delež pozidanih zemljišč in fragmentiranost gozdnih površin) na intenziteto urbanih toplotnih otokov na dveh ravneh. Vpliv rabe tal na intenziteto urbanega toplotnega otoka smo obravnavali za celotno območje Slovenije ter tista območja sosednjih držav, od koder urbani toplotni otoki segajo na njeno območje. V prostorski analizi pojavljanja urbanih toplotnih otokov smo uporabili podatke o povprečni temperaturi najtoplejše četrtine leta, ki izhaja iz satelitskih posnetkov MODIS ter evropske podatke o rabi tal CORINE LAND COVER (CLC). Ugotovili smo, da ima delež gozdov znotraj urbanega toplotnega otoka 1. reda šibek vpliv na intenziteto urbanih toplotnih otokov, vpliv deleža gozdov na intenziteto urbanega toplotnega otoka 2. reda pa je večji (r2 = 0,38; p < 0,001). Intenziteta urbanih toplotnih otokov 1. in 2. reda statistično značilno narašča z deležem pozidanih površin (r2 = 0,35; p < 0,001). Intenziteta urbanih toplotnih otokov se z večanjem gostote gozdnega roba in večanjem fragmentiranosti gozdnih površin znotraj območja urbanega toplotnega otoka niža.

• Language: Slovenian
• Keywords: urbani toplotni otoki, raba tal, delež gozda, intenziteta temperature, satelitski posnetki
• Work type: Master's thesis/paper
• Organization: BF - Biotechnical Faculty
• Year: 2018
• PID: 20.500.12556/RUL-100920
• COBISS.SI-ID: 5065638
• Publication date in RUL: 21.04.2018

Secondary language

• Language: Unknown
• Title: The impact of land use on occurrence of urban heat islands in Slovenia

Abstract

Urban heat islands are the result of anthropogenic activity in urban areas and represent a temperature difference between urban and rural area. Urban heat islands in this study are determined as areas, within the temperature of the surface in the warmest quarter of the year is higher than 0,1 °C and the area is larger than 50 ha. We analysed urban heat islands of different sizes and different land uses (agricultural, built-up, green, forest areas and water bodies). We analysed the impact of land use (forest share, share of built-up areas, forest fragmentation) on the intensity of urban heat islands on two levels. The impact of land use on the intensity of the urban heat island was considered for the entire territory of Slovenia. The method of work was based on the analysis of the European land use map CORINE LAND COVER (CLC) and the satellite images MODIS of the average temperature of the warmest quarter of the year. We found, that share of forest within urban heat islands of level 1, has a weak influence on the intensity of urban heat islands; the influence of forest share on level 2 is higher (r2 = 0,38; p < 0,001). The intensity of urban heat islands of both levels is statistically significantly increasing with the share of built-up areas (r2 = 0,35; p < 0,001). Intensity of urban heat islands increases by increasing the edge density and by increasing the fragmentation of forest areas within the urban heat island.

• Keywords: urban heat island, land use, forest share, temperature intensity, satellite images