We’ve been waiting for El Ni単o, but all we’ve got is El Limbo

By Tom Yulsman | January 10, 2019 7:38 pm

The animation above shows how sea surface temperatures in the Pacific Ocean varied from average week by week, starting in February 2018 and continuing through the first week of January 2019. At the start, cooler than normal temperatures prevail along the equator. As it continues, the surface waters warm, as indicated by the change from blue to red colors.

The Pacific Ocean along the equator is practically shouting to the atmosphere, “Hey, we got an El Ni単o goin’ on over here, what’s your problem?” But the atmosphere just doesn’t seem to want to listen.

Bottom line: We’re still waiting for El Ni単o.

The climatic phenomenon is significant because it can influenceweather around the globe, favoring some damaging impacts but also some welcome ones too. For example, duringEl Ni単o winters, an extended, more powerful jet stream tends tosteer storms into the southern half of California and across parts of the U.S.Southwest.

That extra moisture sure would be nice right about now. That’s because the Four Corners region, where Arizona, New Mexico, Colorado and Utah all come together, is suffering from a horrible, persistent drought. But unfortunately, no dice or, more precisely, no rain and snow at least for now.

Here’s the deal: An El Ni単o gets going when thesea surface along the equator in the Pacific Oceanwarms up beyond a certain threshold. Theatmosphere gets in the act too.The equatorial trade winds that normally blow from east to west (from South America toward Indonesia) weaken and even reverse.This slackening helpswarm subsurface water migrate eastward and rise toward the surface near South America, helpingto reinforce the warming of equatorial Pacific surface waters. As the warm water builds, thunderstorm activity meteorologists call it “convection” shifts from around the Indonesian archipelago to the east.

When all these things come together in just the right way, you get an El Ni単o. Well, the equatorial waters of the Pacific are doing their part. But the atmosphere is refusing to budge. Or as the Climate Prediction Center puts it in its monthly analysis, released today, theatmosphere has “not yet shown a clear coupling to the above-average ocean temperatures.”

So instead of El Ni単o, we have El Limbo.

In its analysis, the prediction centersays the atmosphere should couple with the ocean soon, with a 65 percent chance of El Ni単o continuing through the Northern Hemisphere spring. From the report:

The late winter and early spring tend to be the most favorable months for coupling, so forecasters still believe weak El Ni単o conditions will emerge shortly. However, given the timing and that a weak event is favored, significant global impacts are not anticipated during the remainder of winter, even if conditions were to form.

So folks in theU.S. Four Corners region will have to hope for drought relief coming from other climatic factors. Fingers crossed…

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  • Erik Bosma

    I went to El Nino but all I got was this lousy El Limbo T-shirt.

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ImaGeo

ImaGeo is a visual blog focusing on the intersection of imagery, imagination and Earth. It focuses on spectacular visuals related to the science of our planet, with an emphasis (although not an exclusive one) on the unfolding Anthropocene Epoch.

About Tom Yulsman

Tom Yulsman is Director of the Center for Environmental Journalism and a Professor of Journalism at the University of Colorado, Boulder. He also continues to work as a science and environmental journalist with more than 30 years of experience producing content for major publications. His work has appeared in the New York Times, Washington Post, Audubon, Climate Central, Columbia Journalism Review, Discover, Nieman Reports, and many other publications. He has held a variety of editorial positions over the years, including a stint as editor-in-chief of Earth magazine. Yulsman has written one book: Origins: the Quest for Our Cosmic Roots, published by the Institute of Physics in 2003.

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