Ádám Nádudvari

Abstract

The localization of Surface Urban Heat Island (SUHI) as a potential heat risk for the urban population was evaluated. The paper aimed to propose an approach to quantify and localize (SUHI) based on Landsat series TM, ETM+, OLI satellite imageries from the period 1996-2018 and recognize the Atmospheric Urban HeatIsland (AUHI) effects from long term temperature measurements. Using the theoretical relation between the Normalized Difference Built-up Index (NDBI), the Normalized Difference Vegetation Index (NDVI) and the LST (Land Surface Temperature), SUHI intensity and SUHI risk maps were created from the combination of LST, NDVI, NDBI using threshold values to localize urban heat island in the Katowice conurbation. Negative valuesof SUHI intensity characterize areas where there is no vegetation, highly built-up areas, and areas with high surface temperatures. The urban grow – revealed from SUHI – and global climate change are acting togetherto strengthen the global AUHI effect in the region as the temperature measurements were indicated.

Keywords: NDVI, NDBI, Land Surface Temperature (LST), Surface Urban Heat Island (SUHI)

Ádám Nádudvari [adam.nadudvari@us.edu.pl], Faculty of Natural Sciences University of Silesia Będzińska 60, 41-200 Sosnowiec: Poland