|Shen, C., et al. 2006.|
|Pacific Decadal Oscillation Reconstruction.|
|IGBP PAGES/World Data Center for Paleoclimatology|
|Data Contribution Series # 2006-045.|
|NOAA/NCDC Paleoclimatology Program, Boulder CO, USA.|
goes back to 1470, about when Columbus was learning to walk.
The second thing one notices is that PDO is not a good way to predict rain in San Francisco.