A new Approach to El Niño Prediction beyond the Spring Season

Shuhei Masuda, John Philip Matthews, Yoichi Ishikawa, Takashi Mochizuki, Yuusuke Tanaka, Toshiyuki Awaji

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

The enormous societal importance of accurate El Niño forecasts has long been recognized. Nonetheless, our predictive capabilities were once more shown to be inadequate in 2014 when an El Nino event was widely predicted by international climate centers but failed to materialize. This result highlighted the problem of the opaque spring persistence barrier, which severely restricts longer-term, accurate forecasting beyond boreal spring. Here we show that the role played by tropical seasonality in the evolution of the El Niño is changing on pentadal (five-year) to decadal timescales and thus that El Niño predictions beyond boreal spring will inevitably be uncertain if this change is neglected. To address this problem, our new coupled climate simulation incorporates these long-term influences directly and generates accurate hindcasts for the 7 major historical El Niños. The error value between predicted and observed sea surface temperature (SST) in a specific tropical region (5°N-5°S and 170°-120°W) can consequently be reduced by 0.6 Kelvin for one-year predictions. This correction is substantial since an "El Niño" is confirmed when the SST anomaly becomes greater than +0.5 Kelvin. Our 2014 forecast is in line with the observed development of the tropical climate.

Original languageEnglish
Article number16782
JournalScientific reports
Volume5
DOIs
Publication statusPublished - Nov 25 2015
Externally publishedYes

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spring (season)
sea surface temperature
climate
tropical region
prediction
temperature anomaly
El Nino
seasonality
persistence
timescale
simulation
forecast
long-term forecasting
tropical climate

All Science Journal Classification (ASJC) codes

  • General

Cite this

Masuda, S., Philip Matthews, J., Ishikawa, Y., Mochizuki, T., Tanaka, Y., & Awaji, T. (2015). A new Approach to El Niño Prediction beyond the Spring Season. Scientific reports, 5, [16782]. https://doi.org/10.1038/srep16782

A new Approach to El Niño Prediction beyond the Spring Season. / Masuda, Shuhei; Philip Matthews, John; Ishikawa, Yoichi; Mochizuki, Takashi; Tanaka, Yuusuke; Awaji, Toshiyuki.

In: Scientific reports, Vol. 5, 16782, 25.11.2015.

Research output: Contribution to journalArticle

Masuda, S, Philip Matthews, J, Ishikawa, Y, Mochizuki, T, Tanaka, Y & Awaji, T 2015, 'A new Approach to El Niño Prediction beyond the Spring Season', Scientific reports, vol. 5, 16782. https://doi.org/10.1038/srep16782
Masuda S, Philip Matthews J, Ishikawa Y, Mochizuki T, Tanaka Y, Awaji T. A new Approach to El Niño Prediction beyond the Spring Season. Scientific reports. 2015 Nov 25;5. 16782. https://doi.org/10.1038/srep16782
Masuda, Shuhei ; Philip Matthews, John ; Ishikawa, Yoichi ; Mochizuki, Takashi ; Tanaka, Yuusuke ; Awaji, Toshiyuki. / A new Approach to El Niño Prediction beyond the Spring Season. In: Scientific reports. 2015 ; Vol. 5.
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