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Understanding the recent increase in multiyear La Niñas
Wang, B.; Sun, W.; Jin, C.; Luo, X.; Yang, Y.-M.; Li, T.; Xiang, B.; McPhaden, M.J.; Cane, M.A.; Jin, F.; Liu, F.; Liu, J. (2023). Understanding the recent increase in multiyear La Niñas. Nat. Clim. Chang. 13(10): 1075-1081. https://dx.doi.org/10.1038/s41558-023-01801-6
In: Nature Climate Change. Nature Publishing Group: London. ISSN 1758-678X; e-ISSN 1758-6798
Peer reviewed article  

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Auteurs  Top 
  • Wang, B.
  • Sun, W.
  • Jin, C.
  • Luo, X.
  • Yang, Y.-M.
  • Li, T.
  • Xiang, B.
  • McPhaden, M.J.
  • Cane, M.A.
  • Jin, F.
  • Liu, F.
  • Liu, J.

Abstract
    Five out of six La Niña events since 1998 have lasted two to three years. Why so many long-lasting multiyear La Niña events have emerged recently and whether they will become more common remains unknown. Here we show that ten multiyear La Niña events over the past century had an accelerated trend, with eight of these occurring after 1970. The two types of multiyear La Niña events over this time period followed either a super El Niño or a central Pacific El Niño. We find that multiyear La Niña events differ from single-year La Niñas by a prominent onset rate, which is rooted in the western Pacific warming-enhanced zonal advective feedback for the central Pacific multiyear La Niña events type and thermocline feedback for the super El Niño multiyear La Niña events type. The results from large ensemble climate simulations support the observed multiyear La Niña events–western Pacific warming link. More multiyear La Niña events will exacerbate adverse socioeconomic impacts if the western Pacific continues to warm relative to the central Pacific.

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