Isopleths of monthly mean temperature (1902-1954) at 5 positions 
2° 0° 2° 4° 
Longitude [°W/°E] 
Month 
1 23456789 10 11 
Month 
1 2 3 4 5 6 7 
8 9 10 11 12 
Month 
1 2 3 4 5 6 7 8 9 10 11 12 
Month 
i—i—r 
7 8 9 10 11 12 
-10 
10- 
-20 
20- 
30 
30 
-40 
— 40 
- 
E. 
50 
£ 50 
- 
0 J 
60 
° 60 
-70 
70- 
-80 
80- 
-90 
90- 
MOO 
100- 
1 2 3 4 5 6 7 
~i i r~ 
8 9 10 
~ r 
11 12 
0 
10 
20 
-30 
-40 
50 
60 
70 
80 
90 
100