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In-Depth Information
kWh m
-2
kWh m
-2
kWh m
-2
kWh m
-2
kWh m
-2
10
10
10
10
10
KEW
LERWICK
TRIER
DAVOS
WARSAW
8
8
8
8
8
6
6
6
6
6
4
4
4
4
4
2
2
2
2
2
0
0
0
0
0
J
FM
A
M
JJ
A S O N D
J
FM
A
M
JJ
A S O N D
J
FM
A
M
JJ
A S O N D
J
FM
A
M
JJ
A S O N D
J
FM
A
M
JJ
A S O N D
10°W
0°
10°E
20°E
30°E
50°N
2.6
50°N
4.0
4.0
4.2
40°N
40°N
4.6
0°
10°E
20°E
kWh m
-2
kWh m
-2
kWh m
-2
kWh m
-2
kWh m
-2
10
10
10
10
10
MADRID
LIMOGES
MILAN
BUDAPEST
ATHENS
8
8
8
8
8
6
6
6
6
6
4
4
4
4
4
2
2
2
2
2
0
0
0
0
0
J
FM
A
M
JJ
A S O N D
J
FM
A
M
JJ
A S O N D
J
FM
A
M
JJ
A S O N D
J
FM
A
M
JJ
A S O N D
J
FM
A
M
JJ
A S O N D
Figure 10.25
Average annual means of daily global irradiation on a horizontal surface (kWh/m
-2
) for Western and
Central Europe calculated for the period 1966-1975. Ten-year means of monthly means of daily sums, together with
standard deviations (shaded band), are also shown for selected stations.
Source: Palz (1984). Reproduced by permission of the Directorate-General, Science, Research and Development, European Commission,
Brussels, and W. Palz.
