Temporal and spatial variability of annual and seasonal precipitation from 71
stations located in Western Balkan (WB) countries (Serbia, Bosnia and
Herzegovina, and Montenegro) and their correlations with nine atmospheric
circulation patterns was examined for the period 1950-2016. Annual
precipitation increased significantly throughout the WB (from 2% to 8% per
decade) on 20% of stations located mainly in the mountainous western Serbia
and eastern Bosnia and Herzegovina. Winter was characterized by
non?significant precipitation changes in most of the studied area, with only
a few stations characterized by significant precipitation increase (up to
12% per decade) in the mountainous area of WB, and a few stations
characterized by significant decrease (up to -6% per decade) in the
Pannonian plain. Significant precipitation increase was noticed on 15% of
the stations in spring, while it was noticed on 17% of the stations in
autumn. Summer precipitation decreased significantly (up to -5% per decade)
on a limited area of northern Serbia (6% of the stations), while the
majority of stations showed non?significant increase. The strongest
influences on annual precipitation in WB region are of the Arctic
Oscillation (AO) and Mediterranean Oscillation (MO), leading to the
precipitation decrease during their positive phases. Winter precipitation is
significantly negatively correlated with AO, East Atlantic/Western Russia
oscillation (EA/WR), and North Atlantic Oscillation (NAO) and has a
significant positive correlation with Western Mediterranean Oscillation
(WeMO) on the majority of stations. MO has the strongest influence on summer
precipitation in WB region leading to precipitation decrease, while AO has
the dominant influence on precipitation in the region during autumn.