Eastern Pacific Oscillation (EPO)

Description:
Pattern of variability over the NH Eastern Pacific Region.
Image:

Positive Phase:

Calculation Method:
The indices are based on centers-of-action of 500mb height patterns. These time series utilize the NCEP/NCAR R1 dataset. The region 55-65N;160W-125W is subtracted from 20-35N; 160W-125W.
Time Interval: Daily
Time Coverage: 1948-near present
Update Status: daily
Get Data:
EPO Timeseries
Source:
Data is from NOAA/ESRL PSL
References/Info:
Daily Timeseries
Monthly EPO (different source)