El Niño–Southern Oscillation Evolution Modulated by Atlantic Forcing

Y. Chikamoto, Z. F. Johnson, S. Y.Simon Wang, M. J. McPhaden, T. Mochizuki

研究成果: Contribution to journalArticle査読

8 被引用数 (Scopus)

抄録

The El Niño–Southern Oscillation (ENSO) exerts a strong influence on tropical Atlantic variability, but it is also affected by Atlantic forcing. Previous research has proposed three Atlantic precursors for ENSO: the North tropical Atlantic, the equatorial Atlantic, and the entire tropical Atlantic. However, the relative importance of these Atlantic precursors for ENSO remains unclear. Here, we present evidence from a set of multimodel partial ocean assimilation experiments that equatorial Atlantic cooling is the main contributor for weakening equatorial zonal winds in the Indo-Pacific sector and subsequent ocean warming in the tropical Pacific. Opposite tendencies occur for a warmer equatorial Atlantic. The equatorial Atlantic affects the interbasin climate seesaw between the Atlantic and Pacific through an atmospheric zonal Wavenumber 1 pattern. However, model mean state biases and systematic errors prevent a precise assessment of the response times for the equatorial Pacific trade winds to Atlantic forcing.

本文言語英語
論文番号e2020JC016318
ジャーナルJournal of Geophysical Research: Oceans
125
8
DOI
出版ステータス出版済み - 8 1 2020

All Science Journal Classification (ASJC) codes

  • 地球化学および岩石学
  • 地球物理学
  • 地球惑星科学(その他)
  • 宇宙惑星科学
  • 海洋学

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