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Korean Meteorological Society (한국기상학회)
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The Fine Power Spectra of the Southern Oscillation Index and Its Components and their Implication

  • Lim, G.-H. (School of Earth and Environmental Sciences, College of Natural Sciences, Seoul National University) ;
  • Suh, Y.-C. (Department of Civil Engineering, Pukyong National University)
  • Received : 2015.05.05
  • Accepted : 2015.08.03
  • Published : 2015.09.30
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Abstract

As is evident from its definition, Southern Oscillation Index variability conformed to a combination of the variations of Darwin and Tahiti pressure. Over the El-$Ni{\tilde{n}}o$ Southern Oscillation spectra, the Darwin pressure shared variations associated with the SSN tendency while the Tahiti had a connection with the stratospheric quasi-biennial oscillation modulating annual cycle. The power peak near the 3.5-year period comprised the third harmonic of the sun and the second of the modulated annual cycle. The derived harmonics came from both sources, so the initiation of El-$Ni{\tilde{n}}o$ could be predicted more successfully when including the effects of the sun and QBO.

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References

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