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You are here: Home / Science / Is the Pacific Ocean warm because of undersea volcanic action?

Is the Pacific Ocean warm because of undersea volcanic action?

April 10, 2020 by Karen Hill

Some scientists think it is possible that volcanic activity might be at least partly responsible for the periodic weather phenomenon called El Nino.

This theory was inspired in part by the discovery in 1993 of the largest known cluster of volcanoes, covering an area the size of New York State. The area in question is 600 miles northwest of Easter Island, and it was found to have 1,133 seamounts and volcanoes, far more than any other area then known on land or under the ocean.

While many researchers dismiss the theory, and even proponents concede that there is no proof of cause and effect, some scientists say the idea is plausible enough to merit more research.

When the cluster of volcanoes was discovered, scientists said they were interested in determining whether periods of extreme volcanic activity underwater, like the simultaneous eruption of a dozen or more volcanoes, could be enough to set off El Nino, which alters global weather patterns every two to seven years.

When El Nino is active, a giant high pressure system centered near Easter Island drops slightly in pressure and touches off a change in Pacific currents, bringing warmer water to certain areas and colder water to others.

In 1995, scientists reported that a spate of undersea quakes and lava eruptions had preceded the onset of the El Nino cycle then in effect, leading some scientists to tentatively link the seismic activity to El Nino.

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Filed Under: Science

About Karen Hill

Karen Hill is a freelance writer, editor, and columnist. Born in New York, her work has appeared in the Examiner, Yahoo News, Buzzfeed, among others.

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