Environmental Engineering Reference
In-Depth Information
1947
1956
26.5
1989
1998
26.0
y = 0.0642 x + 25.007
25.5
25.0
24.5
y =
0.023 x + 24.287
24.0
23.5
23.0
22.5
1
2
3
4
5
6
7
8
9
10
Number of years
Source: Meteorological Services Dept, Accra
Figure 4.8 Annual mean temperature at Aburi (1947-1956 and 1989-1998)
250
rainfall
PET
200
150
100
50
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Source: Meteorological Services Dept, Accra
Figure 4.9 Mean water balance at Koforidua (1972-1981)
Although climatological evidence and local opinion suggest that rainfall has been
increasingly variable and skewed towards lower annual totals since the 1980s, with
an accompanying increase in temperatures over the same period, insufficient
evidence exists to support the view that long-term climatic change is taking place.
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