206
Murat Tiirke~
index series. QBOs with the cycles of 2.5-2.6 years at Eski~ehir and 2.1-2.2 years at
Diyarbalar exceed the 0.95 confidence limits of the 'white' noise continuum.
Diyarbaklr also has significant biennial oscillation at the 0.90 confidence level.
13
Bahkesir aridity index MED
I
II
W 09
I "
"- Q. 0.7
_' " .1
OS
°h3O
13
II
'II 09
".. 07
05
'.'
I!I'O
1950
1960
1970
II/aO
1090
Dikih andity index MED
o h30 1940 1950 196C 1970 1980 1990
I I ~ A~ arid:ty inde~ CCAN
09
. '
,...
\
\
~ 07 4 I · "
"' .~.
0.
•
I
05
" •
OJ
. - - - - - -
1930
''8140
liSO
1860
1'&170
1980
1990
13
Kastamonu aridity index CCAN
II
' . I
w 09
.'
. .
.
Q. 0.7 I
~ ...... ' , I - '.
O'
03
'930
1;;-40
1950
'960
1S'70
'980
'990
Year
13
II
'II 09
D.
a: 07
OS
Bodrum aridity index MED
I
1
.'
o h30 19_0 1950 1960 1970 1980 1990
II
Ankara aridity index CCAN
19_0
1950
111&0
'970
1980
Ig!lO
; ; L'""~ ,"Oil, ,"d" CC"
w
•
"- 07
.; ........
' . '
CI..
.~.
05
: . " . ' ... ' ~ '-' . •
o ' 1930 1940""i9~0 '960 1970 1980 1990
Year
Fig.12. Variations of annual AI series of selected stations in Turkey, with smoothed line by the
nine-point Gaussian filter (
) with padded ends and long-term average (
) (re-plotted
from Tiirke~, 1999)