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(A) January
90°E
180°
90°W
90°N
90°N
Polar Easterlies
0
0
0
0
0
Polar
Easterlies
Easterlies
0
60°N
60°N
Westerlies
0
Westerlies
0
Westerlies
0
0
30°N
0
30°N
0
0
0
NE
Trades
NE
Trades
NE
Trades
Trade Winds
(NE)
0
0
Eq.
W'lies
Eq. W'lies
SE
Trades
0
0
0
Trade Winds
(SE)
SE
Trades
30°S
30°S
0
0
0
0
Southern
Westerlies
60°S
0
60°S
0
0
Polar Easterlies
0
0
0
Polar
Easterlies
0
90°S
90°S
90°E
180°
90°W
(B) July
90°E
180°
90°W
90°N
90°N
0
0
0
0
Polar Easterlies
0
0
60°N
0
60°N
Westerlies
0
0
Westerlies
Westerlies
0
0
0
0
30°N
30°N
0
0
NE
Trades
0
SW
Monsson
Trade Winds
(NE)
0
0
SW
Monsson
SW
0
0
SE
Trades
SE
Trades
Trade Winds
(SE)
0
0
0
30°S
30°S
0
Southern
Westerlies
60°S
0
60°S
0
0
Polar Easterlies
0
Polar Easterlies
90°S
90°S
90°E
180°
90°W
Figure 7.12 Generalized global wind zones at 1000mb in January (above) and July (below). The boundary
of westerly and easterly zonal winds is the zero line. Across much of the central Pacific the Trade Winds
are nearly zonal. Based on data for 1970-1999.
Source:NCEP/NCAR Reanalysis Data from the NOAA-CIRES Climate Diagnostics Center.
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