Analysis of Extreme Climatic Indices in the Area of Nis and Belgrade for the Period between 1974 and 2003

Extreme climatic events are the most important elements of climate changes, which directly affect the nature and society. In the recent years, the plethora of extreme climatic indices have been developed for the different parameters, in order to analyze and monitor the extreme climate changes. This paper presents the analysis of maximum and minimum air temperatures (Tmax, Tmin) and precipitation using the eight extreme climatic indices in the city of Nis and Belgrade (Serbia) for the period 1974-2003. The selected indices are: frost days (FD), summer days (SU), ice days (ID), max TX (TXx), max TN (TNx), max 1-day precipitation (Rx1day), consecutive dry days (CDD) and consecutive wet days (CWD). The results show that there are no significant changes in the FD and ID indices, and there are also no changes in the indices CDD and CWD in Nis. The SU, Rx1day, TXx and TNx were increased in each of the observed cities. CDD and CWD were slight decreased in Belgrade.