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Modeling Diurnal Changes in Land Surface Temperature in Urban Areas under Cloudy Conditions

Institute of Geography, Faculty of Science, Pavol Jozef Šafárik University in Košice, 041 54 Košice, Slovakia
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ISPRS Int. J. Geo-Inf. 2020, 9(9), 534; https://doi.org/10.3390/ijgi9090534
Received: 24 July 2020 / Revised: 27 August 2020 / Accepted: 3 September 2020 / Published: 7 September 2020
Land surface temperature (LST) in urban areas is a dynamic phenomenon affected by various factors such as solar irradiance, cloudiness, wind or urban morphology. The problem complexity requires a comprehensive geographic information system (GIS)-based approach. Our solution is based on solar radiation tools, a high-resolution digital surface model of urban areas, spatially distributed data representing thermal properties of urban surfaces and meteorological conditions. The methodology is implemented in GRASS GIS using shell scripts. In these shell scripts, the r.sun solar radiation model was used to calculate the effective solar irradiance for selected time horizons during the day. The calculation accounts for attenuation of beam solar irradiance by clouds estimated by field measurements. The suggested algorithm accounts for heat storage in urban structures depending on their thermal properties and geometric configuration. Computed land surface temperature was validated using field measurements of LST in 10 locations within the study area. The study confirmed the applicability of our approach with an acceptable accuracy expressed by the root mean square error of 3.45 K. The proposed approach has the advantage of providing high spatial detail coupled with the flexibility of GIS to evaluate various geometrical and land surface properties for any daytime horizon. View Full-Text
Keywords: land surface temperature; urban heat storage; urban heat island; solar radiation; GRASS GIS land surface temperature; urban heat storage; urban heat island; solar radiation; GRASS GIS
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MDPI and ACS Style

Hofierka, J.; Bogľarský, J.; Kolečanský, Š.; Enderova, A. Modeling Diurnal Changes in Land Surface Temperature in Urban Areas under Cloudy Conditions. ISPRS Int. J. Geo-Inf. 2020, 9, 534.

AMA Style

Hofierka J, Bogľarský J, Kolečanský Š, Enderova A. Modeling Diurnal Changes in Land Surface Temperature in Urban Areas under Cloudy Conditions. ISPRS International Journal of Geo-Information. 2020; 9(9):534.

Chicago/Turabian Style

Hofierka, Jaroslav; Bogľarský, Jozef; Kolečanský, Štefan; Enderova, Anastasia. 2020. "Modeling Diurnal Changes in Land Surface Temperature in Urban Areas under Cloudy Conditions" ISPRS Int. J. Geo-Inf. 9, no. 9: 534.

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