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No consistent ENSO response to volcanic forcing over the last millennium

Dee, Sylvia G ; Cobb, Kim M ; Emile-Geay, Julien ; Ault, Toby R ; Edwards, R Lawrence ; Cheng, Hai ; Charles, Christopher D

Science (American Association for the Advancement of Science), 2020-03, Vol.367 (6485), p.1477-1481 [Periódico revisado por pares]

United States: The American Association for the Advancement of Science

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  • Título:
    No consistent ENSO response to volcanic forcing over the last millennium
  • Autor: Dee, Sylvia G ; Cobb, Kim M ; Emile-Geay, Julien ; Ault, Toby R ; Edwards, R Lawrence ; Cheng, Hai ; Charles, Christopher D
  • Assuntos: Climate models ; Corals ; Cyclones ; El Nino ; Fossils ; Southern Oscillation ; Statistical analysis ; Statistical significance ; Sulfates ; Volcanic activity ; Volcanic eruptions
  • É parte de: Science (American Association for the Advancement of Science), 2020-03, Vol.367 (6485), p.1477-1481
  • Descrição: The El Niño-Southern Oscillation (ENSO) shapes global climate patterns yet its sensitivity to external climate forcing remains uncertain. Modeling studies suggest that ENSO is sensitive to sulfate aerosol forcing associated with explosive volcanism but observational support for this effect remains ambiguous. Here, we used absolutely dated fossil corals from the central tropical Pacific to gauge ENSO's response to large volcanic eruptions of the last millennium. Superposed epoch analysis reveals a weak tendency for an El Niño-like response in the year after an eruption, but this response is not statistically significant, nor does it appear after the outsized 1257 Samalas eruption. Our results suggest that those models showing a strong ENSO response to volcanic forcing may overestimate the size of the forced response relative to natural ENSO variability.
  • Editor: United States: The American Association for the Advancement of Science
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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