50
Chemical Oceanography, 4th Edition
In recent years, a number of workers have examined the North Atlantic Oscillation (NAO)
and Pacific Decadal Oscillation (PDO) climate anomalies. The SAO index (Figure 1.58) is
represented by the difference in the measured sea- level pressure between the Iceland low
and Portugal during the winter season. The low- frequency component of this difference
gives positive states and correlates with wintertime changes of temperature, precipitation,
Indian
Ocean
Atlantic
Ocean
Pacific
Ocean
Figure 1.57
The overturning circulation of the world ocean.
0.8
°C
0.4
0.2
0.0
–0.2
–0.6
Figure 1.58
The El Nino Southern Oscillation.
Chemical Oceanography, 4th Edition
In recent years, a number of workers have examined the North Atlantic Oscillation (NAO)
and Pacific Decadal Oscillation (PDO) climate anomalies. The SAO index (Figure 1.58) is
represented by the difference in the measured sea- level pressure between the Iceland low
and Portugal during the winter season. The low- frequency component of this difference
gives positive states and correlates with wintertime changes of temperature, precipitation,
Indian
Ocean
Atlantic
Ocean
Pacific
Ocean
Figure 1.57
The overturning circulation of the world ocean.
0.8
°C
0.4
0.2
0.0
–0.2
–0.6
Figure 1.58
The El Nino Southern Oscillation.