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1920s Sir Gilbert finally finds what he has spent two decades searching for. He is able to correlate rainfall in South America with periodic changes in ocean temperatures. He also finds a near-perfect mirror-image connection between barometer readings at stations on Tahiti and Darwin, Australia; as pressure rises in the east, it falls in the west. He coins the term Southern Oscillation to dramatize the ups and downs in this east-west seesaw effect. He also finds linkages between the Asian monsoon season, drought in Australia and parts of Africa, and mild winters in western Canada. |
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