I pointed out the large sea-level anomalies in the Indian Ocean atthe beginning of this presentation, and they can be seen in the animationreferenced in the previous slide. Sea-level anomalies in the easternPacific began to move westward from the coast of South America in September. Shortly after this, sea-level increased suddenly and moved eastward again, indicating a Kelvin wave. At the same time, large sea-level anomalies developed in the southwestern Indian Ocean and began to move westward. By the end of 1997, sea-level in the Indian Ocean was as anomalously high as it was in the eastern Pacific. What was happening?

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Last Modified: Fri, Jul 2, 1998