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Thermal maps were developed using satellite data for the urban areas of <\/SPAN>Bratislava<\/SPAN>, following the co-creation process with the cities, in order to provide information for the thermal risk analysis planned in the ARCH project. Current satellite missions, providing imagery in the Thermal InfraRed (TIR) spectral region at 60-100 meters of spatial resolution, give the possibility to estimate the land surface temperature (LST) and highlight the main surface thermal anomalies, i.e. areas where the surface temperature has a value significantly different from the background. Thermal anomalies are potentially related to underground energy sources or to land use and coverage variations, e.g. urban areas, where the urban heat island (UHI) phenomena can be observed. UHI is considered as one of the most important problems of overheating in urban areas and result, amongst others, in increases of urban smog, increased need of air-conditioning in hot climate regions (with a consequence increasing of energy consumption), and impacts on human health.For this project, the Temperature and Emissivity Separation (Gillespie et al., 1998), for ASTER data) and single-channel algorithm (for Landsat 8, inverting Radiative Transfer Equation) have been used.For <\/SPAN>Bratislava<\/SPAN>9<\/SPAN>ASTER data cloud-masked and night-time estimated Land Surface Temperature have been collected.<\/SPAN><\/P>

LST processed for <\/SPAN>Bratislava<\/SPAN>test site using ASTER data:<\/SPAN><\/P>

- 17 May 2011<\/SPAN><\/P>

- 19 July 2014<\/SPAN><\/P>

- 23 August 2015<\/SPAN><\/P>

- 30 May 2016<\/SPAN><\/P>

- 22 November 2016<\/SPAN><\/P>

- 29 November 2016<\/SPAN><\/P>

- 15 October 2017<\/SPAN><\/P>

- 8 March 2018<\/SPAN><\/P>

- 11 November 2018<\/SPAN><\/P>

To refine this analysis and evaluate potential Urban Heat Islands, the Principal Component Analysis (Fernández et al., 2003; Ruiz et al., 2015; Müller et al., 2014) of the 10 LST image for <\/SPAN>Bratislava<\/SPAN>has been done.<\/SPAN><\/P><\/DIV><\/DIV><\/DIV>", "mapName": "SAT_THER_MAPs", "description": "", "copyrightText": "This product is developed in the framework of the WP4 \"Hazard & Object Information Management System\" of the H2020-ARCH. The \u201cAdvancing Resilience of Historic Areas against Climate-related and other Hazards\u201d (ARCH) project has received funding from the European Union\u2019s Horizon 2020 research and innovation programme under grant agreement no 820999. Gillespie, A., Rokugawa, S., Matsunaga, T., Cothern, J. S., Hook, S., & Kahle, A. B. (1998). A temperature and emissivity separation algorithm for advanced spaceborne thermal emission and reflection radiometer (ASTER) images. IEEE Transactions on Geoscience and Remote Sensing, 36(4), 1113-1126. Fernández, F., Montávez, J. P., González-Rouco, J. F., & Valero, F. (2003, September). A PCA Analysis of the UHI Form of Madrid. In Proceedings of Fifth International Conference on Urban Climate (pp. 1-5). Ruiz, M. A., Sosa, M. B., Cantaloube, E. N. C., & Cantón, M. A. (2015). Suitable configurations for forested urban canyons to mitigate the UHI in the city of Mendoza, Argentina. Urban Climate,14, 197-212 Müller, B., Bernhardt, M., & Schulz, K. (2014). Identification of catchment functional units by time series of thermal remote sensing images. 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