Trends of Changes in Minimum Lake Water Temperature in Poland

Water temperature in lakes is their basic property that determines many processes. Changes average values are thoroughly investigated using a long-term approach. Knowledge of extreme situations such as minimums still insufficient. This paper analyses changes the minimum 10 Poland period 1972–2021. The obtained results show variability over course parameter, both at annual and monthly scale. In first case, half analysed set showed statistically significant increasing trends (on 0.10 °C per decade). latter greatest occurred months warm half-year 0.57 reported situation caused by individual conditions particular lakes, i.e., location, morphometric parameters, or dynamics occurrence ice phenomena. A successive increase has its consequences for biotic abiotic Exceeding specific thresholds evident transformation these ecosystems.