Dissimilar characteristics associated with the 1976/1977 and 1998/1999 climate regime shifts in the North Pacific
- Authors
- Song, Se-Yong; Yeh, Sang-Wook; Park, Jae-Hun
- Issue Date
- Nov-2020
- Publisher
- Springer Verlag
- Citation
- Theorectical and Applied Climatology, v.142, no.3-4, pp.1463 - 1470
- Indexed
- SCIE
SCOPUS
- Journal Title
- Theorectical and Applied Climatology
- Volume
- 142
- Number
- 3-4
- Start Page
- 1463
- End Page
- 1470
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/773
- DOI
- 10.1007/s00704-020-03378-y
- ISSN
- 0177-798X
- Abstract
- We examined dissimilar characteristics associated with the North Pacific mean sea surface temperature (SST) regime shifts across 1976/1977 and 1998/1999. The SST spatial pattern across 1976/1977 was more similar to that of a Pacific Decadal Oscillation compared with that across 1998/1999. Across the 1976/1977 regime shift, the wind stress curl forcing before 1976/1977 was not balanced with meridional oceanic currents after 1976/1977, indicating that the oceanic dynamic adjustment due to basin-scale anomalous wind forcing in the North Pacific played a minor role in the 1976/1977 climate regime shift. However, the atmospheric forcing significantly contributed to the SST condition after the 1976/1977 regime shift. On the other hand, both oceanic dynamic adjustment and atmospheric wind forcing played key roles in the 1998/1999 North Pacific regime shift.We infer that the leading mechanisms associated with the North Pacific SST regime shift depend on the change of mean SST over the tropical Pacific.
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