Change in the distribution of precipitation events due to the temperature increase

We investigated the dependence of several characteristics of precipitation events on ground temperature. We defined the precipitation events as a time-continuous events based on hourly precipitation data, using a threshold of 0.2 mm/h for the rain / non-rain distribution. We considered ground temperature before the start of precipitation to ensure that the temperature was not affected by precipitation. We investigated the precipitation events for the warm half of the year (from April to September) and compared their characteristics for (i) precipitation events obtained from ground measurements for the period 1998-2019 from 97 precipitation stations, (ii) precipitation events based on reanalyses for a 25-year long period (1990-2014) and (iii) precipitation events using climate projections for three future periods (2026-2050, 2051-2075 and 2076-2100). The reanalyses and climate projections were calculated using a modified ALADIN NWP model with a horizontal resolution of 2.3 km.The results show a difference in the precipitation events determined from measured data as compared to those determined by the model. This is likely related to the significantly different number of the data and the fact that the model precipitation is smoother than the measured precipitation. The characteristics of precipitation events based on reanalyses and climate projections are similar in structure, but the projections show an increase in precipitation with increasing temperature in future to a certain temperature threshold.