Observed temperature and precipitation
variability in Romania
Aristita Busuioc, Constanta Boroneant, Madalina Baciu,
Alexandru Dumitrescu
National Meteorological Administration,
Bucharest, Romania
Annual mean temperature over Romania (1901-2007) increased
by 0.5oC, significant warming over the extra-Carpathian region
OC
Media anuala
aerului-media pe tara
Annual
meana tempertaturii
temperature-spatial
average
12
11.5
11
10.5
10
9.5
9
8.5
8
7.5
7
1901 1911 1921 1931 1941 1951 1961 1971 1981 1991 2001
anii
Temperatura medie a aerului din timpul iernii-
Winter mean temperature-spatial
average over Romania
media pe tara
4
3
2
1
0
-1
-2
-3
-4
-5
-6
Summer mean temperature-spatial
Media average
pe tara a temperaturii
aerului-vara
over Romania
-7
1902 1912 1922 1932 1942 1952 1962 1972 1982 1992 2002
24.0
22.5
- Winter 2006-2007(6 C anomaly) – the warmest
o
C
o
over the entire observational period in Romania;
21.0
19.5
18.0
16.5
-Summer 2007- comparable (as spatial mean
intensity) with the 1946 summer, but with higher
persistence of very hot days (>35 oC) (10 days at 3
stations); record number of max. temp. >40 oC (148
cases)
15.0
1901
1916
1931
1946
1961
anii
1976
1991
2006
Winter mean temperature-trends(oC)/10 years: 1961-2007
Summer mean temperature-trends(oC)/10 years: 1961-2007
Trend of the annual precipitation over Romania (mm)/1891-2007
pp-annual
1000.0
900.0
800.0
mm
700.0
600.0
500.0
400.0
300.0
200.0
100.0
0.0
1891 1906 1921 1936 1951 1966 1981 1996
General trend: decreasing with some increasing over NE and S;
Pronounced interdecadal variability;
After 1961-an intensification of deficit over the southern regions.
Annual precipitation in Romania-trend over 1961-2000
NUMARUL
CU SOL
CU ZAPADA
DIN IERNILE
1901-2007
NumberZILELOR
of days
withACOPERIT
snow during
winter
(1901-2007)
BUCURESTI-FILARET
Bucuresti-Filaret
100
90
80
70
zile
60
50
40
30
20
10
0
1902 1910 1918 1926 1934 1942 1950 1958 1967 1975 1983 1991 1999 2007
Trends of annual frequency of rime (no of days): 1961-2000
Increasing over the
almost country
Trends of maximum duration of dry days (1961-2000)
Winter-significant increase
over the south-western
regions
Summer- significant
increasing over the
western regions
• Other extreme events (1961-2000):
• Increase of annual frequency of tropical days (daily
max. > 30oC);
•
Decrease of frequency of cold days (daily max. <
0oC);
• Increase of summer mean minimum temperature
• Increase of winter and summer mean maximum
temperature (up to 2 oC in S and SE during summer);
• Increase of annual frequency of very wet days (the
highest 12% daily amount) si extremely wet days (the
highest 4%daily amount) for some regions over the
period1946-1999