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North Atlantic oscillation controls multidecadal changes in the North Tropical Atlantic−Pacific connection

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  • Ruiqiang Ding

    (Beijing Normal University
    Beijing Normal University)

  • Hyacinth C. Nnamchi

    (GEOMAR Helmholtz Centre for Ocean Research Kiel
    University of Nigeria)

  • Jin-Yi Yu

    (University of California)

  • Tim Li

    (University of Hawai’i at Manoa)

  • Cheng Sun

    (Beijing Normal University)

  • Jianping Li

    (Ocean University of China)

  • Yu‐Heng Tseng

    (National Taiwan University)

  • Xichen Li

    (Chinese Academy of Sciences)

  • Fei Xie

    (Beijing Normal University)

  • Juan Feng

    (Beijing Normal University)

  • Kai Ji

    (Beijing Normal University)

  • Xumin Li

    (Beijing Normal University)

Abstract

By exciting subtropical teleconnections, sea surface temperature (SST) anomalies in the North Tropical Atlantic (NTA) during boreal spring can trigger El Niño-Southern Oscillation (ENSO) events in the following boreal winter, thereby providing a precursor for ENSO predictability. However, this NTA−ENSO connection is not stationary, and it varies considerably over multidecadal timescales, which cannot be directly explained by the Atlantic multidecadal oscillation or the global warming trend. Here we show that multidecadal changes in the NTA−ENSO connection are principally controlled by multidecadal variability associated with the North Atlantic Oscillation (NAO). During the positive phase of the NAO, the amplification of the NTA impact on ENSO mainly arises from strengthening of the boreal spring mean precipitation over the equatorial Atlantic and enhancement of the persistence of NTA SST anomalies, which enhance the NTA influence by exciting stronger and more persistent subtropical teleconnections. Our findings show that multidecadal variability of the NAO is key to understanding the impacts of the NTA SST on the tropical Pacific Ocean.

Suggested Citation

  • Ruiqiang Ding & Hyacinth C. Nnamchi & Jin-Yi Yu & Tim Li & Cheng Sun & Jianping Li & Yu‐Heng Tseng & Xichen Li & Fei Xie & Juan Feng & Kai Ji & Xumin Li, 2023. "North Atlantic oscillation controls multidecadal changes in the North Tropical Atlantic−Pacific connection," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-36564-3
    DOI: 10.1038/s41467-023-36564-3
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    References listed on IDEAS

    as
    1. Austin P.C. & Tu J.V., 2004. "Bootstrap Methods for Developing Predictive Models," The American Statistician, American Statistical Association, vol. 58, pages 131-137, May.
    2. Hyacinth C. Nnamchi & Mojib Latif & Noel S. Keenlyside & Joakim Kjellsson & Ingo Richter, 2021. "Diabatic heating governs the seasonality of the Atlantic Niño," Nature Communications, Nature, vol. 12(1), pages 1-10, December.
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