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    Home»Science»Research links El Niño to Atlantic weather a year later, could enhance long-range weather forecasting
    Science

    Research links El Niño to Atlantic weather a year later, could enhance long-range weather forecasting

    By AdminOctober 4, 2024
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    Research links El Niño to Atlantic weather a year later, could enhance long-range weather forecasting


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    Credit: Pixabay/CC0 Public Domain

    New research has revealed that the impact of one of the world’s most influential global climate patterns is much more far-reaching than originally thought.

    Scientists at the U.K.’s Meteorological Office have discovered that away from the tropics, the El Niño-Southern Oscillation (ENSO) has an additional impact on Atlantic weather patterns a full year on from the original event. Research shows this one year lagged extratropical response to ENSO is as strong as the simultaneous response, but with an opposite impact.

    The paper is published in the journal Science.

    For example, it has now been shown that El Niño, which can increase the chance of colder winters in the UK, can result in a milder winter period the following year.

    While ENSO is just one of many drivers that influence the UK weather, it can be important, particularly in the winter months.

    Lead researcher Professor Adam Scaife, of the Met Office and the University of Exeter, said, “This latest research reveals that El Niño is often followed by positive North Atlantic Oscillation (NAO) a whole year later, while La Niña is followed by negative NAO one year later. The results of this research have major implications for understanding ENSO, explaining our winter climate variability and interpreting long range predictions.”

    The research shows that knowledge of the previous winter ENSO event is also important for understanding some of the UK’s extreme winters. In cases in which El Niño is followed by La Niña, or vice versa, the lagged effects can boost expected impacts.

    For example, La Niña was followed by El Niño in 1968/69, 1976/77, 2009/10, boosting the resulting cold weather, while the UK saw mild and stormy weather in the winters of 1988/89, 1998/99, 2007/8 when El Niño was followed by La Niña.

    ENSO shifts back and forth irregularly every two to seven years, bringing predictable shifts in ocean surface temperature and disrupting wind and rainfall patterns across the tropics.

    With increased understanding of the teleconnections and impacts of ENSO, meteorologists will be better able to reproduce them in climate models and better able to plan for variations in winter weather.

    More information:
    Adam A. Scaife et al, ENSO affects the North Atlantic Oscillation 1 year later, Science (2024). DOI: 10.1126/science.adk4671

    Provided by
    University of Exeter


    Citation:
    Research links El Niño to Atlantic weather a year later, could enhance long-range weather forecasting (2024, October 4)
    retrieved 4 October 2024
    from https://phys.org/news/2024-10-links-el-nio-atlantic-weather.html

    This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no
    part may be reproduced without the written permission. The content is provided for information purposes only.

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