Spatial and Temporal Variations in Precipitation and Aridity Index Series of Turkey
Ballkesir andlty index MED
'.
.~ • 0
,.
•
~~lD ~~ ikil ~ i aridity Index MED
E 20
~ 00
L---•
!. ·10
.#.
% ·20
~..
..
_ -
·30
- .. -~-v ...... ,,.,--....·.~
"'0
1930
1940
1950
1960
1970
1980
1990
'0 l Bodrum aridity index MED
30
~ 20
~ '0
i 00
I
- - - : -% :~~
..,-"-.-..--"",,...-... --. . . . . . . . -_ . ."..., .. . . . . . . . . . . .
. 3 0 ' "
..
• ... -
... 0 .~ .......... ~,~ ~n~
'930
'9'0
'950
'960
'970
'990
'990
40
30
:: 20
; 10
! .~~
% ·20
·30
E 20
Akhisar aridity index MED
~ , 0
.--., ... _._
~ 00
; -10
....
..,.-; ·20
._
~ .. -
·30
....
,;-........ ~.,,~ ..
• 0 ~ AfyOll aridity index CCAN
30
-4 ~9Jo T 19.Q ,gsO"" 1960-''''.7~0-''''990~''''''m
~ ~.~ r._~::a aridity index CCAN
~ 10
..
" -
! .~~ , ~ :-._~.,."._.- . . . - ; - . _ -- -_ - : -
. _ - -- .- :
;) -20
..
-30
~~9~30~~ ' 9~'0~~'9~50~~'~~~'~97~0~'~9B~0~'~900~
40
S 30
-~ 20
t> 10
~ 00
~ :~g
Merzlfon aridity index CCAN
.. ~--..-...~~
...... "...--. . .... .".-.. .'
501
.30.
·.o'--~~~--------'930
1940
'950
'960
'970
'990
,m
Yea r
207
Fig. 13. Trends of annual AI series of selected stations in Turkey from sequential values of the
statistics u(l) (
) and u'(l) (
) of the Mann-Kendall test, with the critical value of ± 1.96 at
the 5 per cent significance level (
) (re-plotted from Tiirke~, 1999)
4.2.3 An Assessment of Precipitation Anomalies During the Period
1994-2000
The main section of this study was performed based on the precipitation and aridity
index series for the 1930-1993 period. It was already seen that dry conditions
dominated mostly during the period from mid-late 1980s to the early 1990s over the
considerable parts of Turkey. A new analysis has also been made for the precipitation
data of 1994-2000, in order to evaluate the spatial and temporal variations of dry and