The North Pacific Oscillation-ENSO and internal atmospheric variability

Sang Wook Yeh, Ben P. Kirtman

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

The relationship between the North Pacific Oscillation (NPO) and El Niño and Southern Oscillation (ENSO) is reexamined using three runs of a coupled general circulation model. The difference in the three simulations is only in the amplitude of internal atmospheric variability felt by the ocean component at the air-sea interface. In observations and a standard coupled model (one AGCM coupled to a single OGCM), the NPO and ENSO may be explained by correlated white noise time series or by two independent red noise time series processes. However, there is the possibility the influence of ENSO could be felt depending on the amplitude of the noise in the North Pacific. When the amplitude of the atmospheric noise is reduced, stronger ENSO variability goes with a stronger ENSO-NPO correlation. The analysis suggests that local North Pacific internal atmospheric dynamics overwhelms the remote influence from ENSO in the coupled model.

Original languageEnglish (US)
Pages (from-to)L13206 1-5
JournalGeophysical Research Letters
Volume31
Issue number13
DOIs
StatePublished - Jul 16 2004
Externally publishedYes

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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