The North Pacific climate transitions of the winters of 1976/77 and 1988/89

Sang Wook Yeh, Yune Jung Kang, Yign Noh, Arthur J. Miller

Research output: Contribution to journalArticle

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Abstract

This paper examines characteristic changes in North Pacific sea surface temperature (SST) variability during the boreal winter (December-February) for two subperiods (1956-88 and 1977-2009) during which the 1976/77 and the 1988/89 climate transitions occurred. It is found that the Pacific decadal oscillation (PDO)-like SST variability plays a dominant role in the 1976/77 climate transition, while both the North Pacific Gyre Oscillation (NPGO)-like and PDO-like SST variability contribute to the 1988/89 climate transition. Furthermore, the leading mode changes from PDO-like SST variability during the period 1956-88 to NPGO-like SST variability during the period 1977-2009, indicative of an enhancement of NPGO-like SST variability since 1988. Changes in sea level pressure across the 1976/77 climate transition project strongly onto the Aleutian low pressure system. But sea level pressure changes across the 1988/89 climate transition project primarily onto the North Pacific Oscillation, which is associated with remote changes in the Arctic Oscillation over the polar region as well. This contributes to enhancing the NPGO-like SST variability after 1988. The authors also analyze the output from an ensemble of Tropical Ocean and Global Atmosphere (TOGA) experiments in which the observed SSTs are inserted only at grid points in the tropics between 20°S and 20°N. The results indicate that the changes in the North Pacific atmosphere in the 1976/77 climate transition are mostly due to the tropics, whereas those in the 1988/89 climate transition are not.

Original languageEnglish
Pages (from-to)1170-1183
Number of pages14
JournalJournal of Climate
Volume24
Issue number4
DOIs
Publication statusPublished - 2011 Feb 1

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sea surface temperature
winter
climate
gyre
oscillation
Pacific Decadal Oscillation
sea level pressure
low pressure system
Arctic Oscillation
atmosphere
polar region
ocean
experiment

All Science Journal Classification (ASJC) codes

  • Atmospheric Science

Cite this

Yeh, Sang Wook ; Kang, Yune Jung ; Noh, Yign ; Miller, Arthur J. / The North Pacific climate transitions of the winters of 1976/77 and 1988/89. In: Journal of Climate. 2011 ; Vol. 24, No. 4. pp. 1170-1183.
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The North Pacific climate transitions of the winters of 1976/77 and 1988/89. / Yeh, Sang Wook; Kang, Yune Jung; Noh, Yign; Miller, Arthur J.

In: Journal of Climate, Vol. 24, No. 4, 01.02.2011, p. 1170-1183.

Research output: Contribution to journalArticle

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