Geoscience Reference
In-Depth Information
180°
120°
60°W
0°
60°E
120°
180°
January
60°
60°
H
L
L
L
995
9
95
1000
40°
1005
40°
H
1010
L
H
H
H
H
20°N
20°N
1
010
M
T
L
IT
CZ
0°
0°
1007.5
L
ZAB
ITCZ
L
L
20°S
20°S
H
1020
H
H
H
H
1005
1000
40°
40°
H
60°
L
60°
180°
120°
60°W
0°
60°E
120°
180°
180°
120°
60°W
0°
60°E
120°
180°
July
60°
60°
L
L
40°
40°
H
L
H
L
L
20°N
20°N
L
L
0°
0°
20°S
H
H
20°S
H
1025
1020
1015
1010
1005
H
H
1010
40°
40°
990
98
5
L
L
L
60°
60°
180°
120°
60°W
0°
60°E
120°
180°
Figure 9.18
Mean pressure (mb) and surface winds for the world in January and July. The major frontal
and convergence zones are shown as follows: Intertropical Convergence Zone (ITCZ), South Pacific
Convergence Zone (SPCZ), Monsoon Trough (MT), Zaire Air Boundary (ZAB), Mediterranean Front (MF),
Northern and Southern Hemisphere Polar Fronts (PF), Arctic Fronts (AF) and Antarctic Fronts (AAF).
Source: Partly from Liljequist (1970).
