The study analyzes trends in extreme climate indices in Sarajevo (Bosnia and
Herzegovina). Based on daily maximum temperatures, daily minimum temperatures and
daily precipitation during the 1961–2016 periods, a set of 27 indices recommended by the
CCl/CLIVAR Expert Team for Climate Change Detection and Indices (ETCCDI) was
calculated in the RClimDex (1.0) software. Given the results, the extreme temperature
indices displayed a warming tendency throughout the year (most prominent in summer).
The positive trends in warm temperature indices were stronger than the downward trends
in cold ones. The highest trend values were estimated for TXx, TNx, TX90p, TN90p, WSDI,
SU25 and SU30. The extreme precipitation indices displayed trends mixed in sign
(annually and seasonally), but all statistically insignificant. However, upward trends in
R99p, RX1day, RX5day, SDII, R10mm and R20mm suggest an increase in the magnitude
and frequency of intense precipitation events. Moreover, significant changes in distribution
of majority temperature indices were determined, whereas shifts in precipitation indices
were mostly insignificant. The observed changes in extreme temperature indices are
related with large-scale atmospheric circulation patterns (primarily the East-Atlantic
pattern) and the Atlantic Multidecadal Oscillation. The negative correlation with the North
Atlantic Oscillation, the East Atlantic/West Russia pattern and the Arctic Oscillation is
found for majority of extreme precipitation indices.