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dc.contributor.authorKhodri, M.
dc.contributor.authorIzumo, T.
dc.contributor.authorVialard, J.
dc.contributor.authorJanicot, S.
dc.contributor.authorCassou, C.
dc.contributor.authorLengaigne, M.
dc.contributor.authorMignot, J.
dc.contributor.authorGastineau, G.
dc.contributor.authorGuilyardi, E.
dc.contributor.authorLebas, N.
dc.contributor.authorRobock, A.
dc.contributor.authorMcPhaden, M.J.
dc.date.accessioned18/2/2019
dc.date.accessioned2019-02-18T20:16:34Z
dc.date.available3/12/2017
dc.date.available2019-02-18T20:16:34Z
dc.date.issued2017
dc.identifier.citationNature Communications, vol.8(1); 2017; Article no: 778
dc.identifier.issn2041-1723
dc.identifier.urihttps://doi.org/10.1038/s41467-017-00755-6
dc.identifier.urihttp://drs.nio.org/drs/handle/2264/7913
dc.description.abstractStratospheric aerosols from large tropical explosive volcanic eruptions backscatter shortwave radiation and reduce the global mean surface temperature. Observations suggest that they also favour an El Ni�o within 2 years following the eruption. Modelling studies have, however, so far reached no consensus on either the sign or physical mechanism of El Ni�o response to volcanism. Here we show that an El Ni�o tends to peak during the year following large eruptions in simulations of the Fifth Coupled Model Intercomparison Project (CMIP5). Targeted climate model simulations further emphasize that Pinatubo-like eruptions tend to shorten La Ni�as, lengthen El Ni�os and induce anomalous warming when occurring during neutral states. Volcanically induced cooling in tropical Africa weakens the West African monsoon, and the resulting atmospheric Kelvin wave drives equatorial westerly wind anomalies over the western Pacific. This wind anomaly is further amplified by air-sea interactions in the Pacific, favouring an El Ni�o-like response.
dc.languageen
dc.publisherNature Publishing Group
dc.relation.isreferencedbySCI
dc.titleTropical explosive volcanic eruptions can trigger El Ni�o by cooling tropical Africa
dc.typeJournal Article
dc.affiliation.authorSorbonne Universit�s, UPMC Universit� Paris 06, IPSL, UMR CNRS/IRD/MNHN, F-75005, Paris, France


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