The Footprint of the 11-Year Solar Cycle in Northeastern Pacific SSTs and Its Influence on the Central Pacific El Niño

Yong Fu Lin, Jin Yi Yu*, Chau Ron Wu, Fei Zheng

*此作品的通信作者

研究成果: 雜誌貢獻通訊期刊論文同行評審

2 引文 斯高帕斯(Scopus)

摘要

Applying statistical analyses to reanalysis products during the period 1900–2018, this study finds the 11-year solar cycle to have a significant correlation with sea surface temperature (SST) variations in the Northeastern Pacific. The solar influence is first manifested and amplified in the lower stratosphere, which then alters the strength of Hadley circulation in the troposphere. Lastly, the changes in the sinking branch of the Hadley circulation modulate surface heat fluxes to give rise to the SST footprint. The footprint has a structure similar to that of the Pacific meridional mode (PMM) that is known to be an important trigger of the central Pacific (CP) type of the El Niño-Southern Oscillation (ENSO). The 11-year solar cycle is thus shown to contribute to the slow modulation of the CP ENSO and, in particular, to be associated with more CP El Niño (La Niña) events during the active (inactive) phase of the cycle.

原文英語
文章編號e2020GL091369
期刊Geophysical Research Letters
48
發行號5
DOIs
出版狀態已發佈 - 2021 三月 16

ASJC Scopus subject areas

  • 地球物理
  • 地球與行星科學(全部)

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