http://www.esrl.noaa.gov/psd/data/correlation/pdo.data |
http://lwf.ncdc.noaa.gov/oa/climate/research/sst/weekly-sst.php |
A traditional positive phase PDO has cool temperature anomalies in the northern Pacific, with warm anomalies in the equatorial Pacific. This would make for a correlation between a positive PDO and El Nino, as well as a negative PDO and La Nina.
If an El Nino is forming, it is definitely conceivable that the Pacific Decadal Oscillation will try and make a move to a positive phase, which would enhance winter precipitation.
Seeing as there is a large warm body of water in the North Pacific tells me there remains a lot of work to be done, but there are some signs that a positive PDO may be trying to get going.
Andrew