EOF analyses were calculated of the monthly SST were based on the temporal covariance matrix from the 1900-1993 period of record. using SST anomalies poleward of 20N in the Pacific basin.

Time Interval: Monthly
Time Coverage: 1900 to Jun 2021
Update Status: Periodically updated

Get Data:

PDO: Standard PSL Format (What is standard format?)
PDO: Original

Source:
Data is from U of Washington
References:

1. A Pacific interdecadal climate oscillation with impacts on salmon production by Nathan J. Mantua, Steven R. Hare, Yuan Zhang, John M. Wallace, and Robert C. Francis, Bulletin of the American Meteorological Society, June, 1997 (Vol 78, pp. 1069-1079)

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