Nature Communications (Oct 2017)

Tropical explosive volcanic eruptions can trigger El Niño by cooling tropical Africa

  • Myriam Khodri,
  • Takeshi Izumo,
  • Jérôme Vialard,
  • Serge Janicot,
  • Christophe Cassou,
  • Matthieu Lengaigne,
  • Juliette Mignot,
  • Guillaume Gastineau,
  • Eric Guilyardi,
  • Nicolas Lebas,
  • Alan Robock,
  • Michael J. McPhaden

DOI
https://doi.org/10.1038/s41467-017-00755-6
Journal volume & issue
Vol. 8, no. 1
pp. 1 – 13

Abstract

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El Niño tends to follow 2 years after volcanic eruptions, but the physical mechanism behind this phenomenon is unclear. Here the authors use model simulations to show that a Pinatubo-like eruption cools tropical Africa and drives westerly wind anomalies in the Pacific favouring an El Niño response.