open access

https://hdl.handle.net/2115/21813

Resonance in bidecadal and pentadecadal climate oscillations over the North Pacific : Role in climatic regime shifts

英語

1999-04-01

American Geophysical Union

Geophysical Research Letters

26(7)

855-858

The roles of interdecadal oscillations in climatic regime shifts, which are observed as rapid strength changes in the Aleutian low in winter and spring seasons, have been analyzed. A regime shift results from simultaneous phase reversals between pentadecadal and bidecadal variations, which synchronize with one another at a relative period of three. The pentadecadal variation, which is observed in both winter and spring seasons, provides the basic timescale of regime shifts, while the bidecadal variation, which is observed only in winter, characterizes the rapidity of the shifts. A Monte-Carlo simulation has shown that the simultaneous phase reversals or resonance between the pentadecadal and bidecadal variations reflect a physical linkage between them and do not coincide accidentally. The role of this synchronization feature for assessing and predicting regime shifts is discussed.

学術雑誌論文

Accepted Manuscript

An edited version of this paper was published by AGU. Copyright 1999 American Geophysical Union.

0094-8276