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Western Pacific Warm Pool

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Article Information
Category: Weather Weather
Content source: SKYbrary About SKYbrary
Content control: SKYbrary About SKYbrary
WX
Tag(s) Climatic Phenomena

Definition

The Pacific Warm Pool (PWP) is defined in some publications as the area in the Western Tropical Pacific enclosed by the 28.5 deg C isotherm.

This body of water, which spans the western waters of the equatorial Pacific, holds the warmest seawaters in the world. Because this area of warm water pushes west into the Indian Ocean, it is also often refereed to as the Indo-Pacific Warm Pool.

Scientists found that, over a period of roughly two decades, the warm pool’s average annual temperatures and dimensions increase and then decrease like a slowly pulsating beacon.

South Pacific Convergence Zone


Discussion

Because these waters are hot enough to drive heat and moisture high into the atmosphere, the warm pool has a large effect on the climate of surrounding lands. Furthermore, the slow fluctuations of size and intensity of the warm pool may be linked with the intensity of El Niño.

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Further Reading