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A recent and abrupt decline in the East African long rains

Lyon, Bradfield ; DeWitt, David G.

Geophysical research letters, 2012-01, Vol.39 (2), p.n/a [Periódico revisado por pares]

Washington, DC: Blackwell Publishing Ltd

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  • Título:
    A recent and abrupt decline in the East African long rains
  • Autor: Lyon, Bradfield ; DeWitt, David G.
  • Assuntos: Climate change ; drought ; Earth ; Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; rapid climate change ; regional climate change ; Regions
  • É parte de: Geophysical research letters, 2012-01, Vol.39 (2), p.n/a
  • Notas: istex:7237D7C3676738282F1A52F7BF696F05ACCE83E4
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    ArticleID:2011GL050337
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    content type line 23
  • Descrição: The successive failure of the East African short rains (typically October‐December) and subsequent long rains (March‐May) in 2010–11 plunged much of the region into severe drought, impacting millions of people and triggering a humanitarian crisis. While poor short rains in 2010 were generally anticipated given linkages with La Niña, the subsequent long rains do not exhibit similar predictability. Here we show the long rains failure in boreal spring of 2011 is consistent with a recurrent large‐scale precipitation pattern that followed their abrupt decline around 1999. Using observations and climate model simulations, we show the abrupt decline in long rains precipitation is linked to similarly abrupt changes in sea surface temperatures, predominately in the tropical Pacific basin. Key Points There has been an abrubt decline in East African rainfall The rainfall decline is associated with abrupt changes in the tropical Pacific The Indian Ocean does not appear to be a primary factor as previously suggested
  • Editor: Washington, DC: Blackwell Publishing Ltd
  • Idioma: Inglês
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