Groundwater Urban Heat Island in Wrocław, Poland

In the face of climate change and constantly progressing urbanization processes, so-called heat islands are observed with growing frequency. These phenomena mainly characteristic large cities, where increased air land surface temperatures form an atmospheric (AUHI) or (SUHI) urban island (UHI). Moreover, UHIs have also been recognized in underground environments many cities worldwide, including groundwater (GUHI). However, this phenomenon is not yet as thoroughly studied AUHI SUHI. To recognize characterize thermal conditions beneath city Wrocław (SW, Poland), we analyze temperature (GWT) first aquifer, measured 64 wells 2004–2005. The study aimed to identify (GUHI) Wrocław. Therefore, used a novel approach gather data them predefined seasonal periods. Meteorological satellite imagery from same period allowed us link GWT anomalies typical that favor UHI formation. anomaly related GUHI was identified central, urbanized part found occurs only seasonally during winter, which city’s zone anthropogenic sources. Comparing our results previous works other showed untypical behavior anomalies. contrast SUHI temperatures, detected characterized by transitions winter cold lake summer. Such transitional character described for time.