Geoscience Reference
In-Depth Information
(a)
(b)
99
30
10
(c)
(d)
1
0
90
60
30
60
60
Figure 10.17
The percentage frequency of hourly temperatures above or below certain limits for North
America. A: January temperatures <0°C; B: January temperatures >10°C; C: July temperatures <10°C;
D: July temperatures >21°C.
Source: After Rayner (1961).
