El Niño–Southern Oscillation Evolution Modulated by Atlantic Forcing

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

doi:10.1029/2020JC016318

i

El Niño–Southern Oscillation Evolution Modulated by Atlantic Forcing

2020
By Chikamoto, Y. ; Johnson, Z. F. ; Wang, S.‐Y. Simon ; ...

Details

Journal Title:

Journal of Geophysical Research: Oceans
Personal Author:

Chikamoto, Y. ; Johnson, Z. F. ; Wang, S.‐Y. Simon ; McPhaden, M. J. ; Mochizuki, T.
NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; PMEL (Pacific Marine Environmental Laboratory)
Description:

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.
Keywords:

Climatology Weather Forecasting Weather Forecasting Atmosphere‐ocean Interaction Climate Models Climate Predictability ENSO Interbasin Interaction Tropical Climate Variability
Source:

Journal of Geophysical Research: Oceans, 125(8)
DOI:

https://doi.org/10.1029/2020JC016318
Document Type:

Journal Article
Place as Subject:

Atlantic Ocean
Rights Information:

Other
Compliance:

Submitted
Main Document Checksum:

urn:sha256:ead5092dc14ceb7998cb927353cbb7b2c35289d20e9d1f05e7c32db8607b7f89
Download URL:

https://repository.library.noaa.gov/view/noaa/29150/noaa_29150_DS1.pdf
File Type:

[PDF - 4.75 MB ]

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