题目内容

According to the model, what normally signals the disappearance of an El Nino？

A. The arrival in the eastern Pacific of negative sea-level Kelvin waves.
B. An increase in the speed at which negative Rossby waves cross the Pacific.
C. A shift in the direction of the winds produced by the start of an anti-El Nino elsewhere in the Pacific.
D. The reflection of Kelvin waves after they reach the eastern boundary of the Pacific, along Ecuador and Peru.

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