Principal Component Analysis of Winter 2013-2014 - Finding the Predominant Modes

Using the predominant signals of the Winter 13-14 (defined by NDJF), Extremely Warm Mean NPAC SST's, Very High Bering Sea/Alaskan Mean 500mb Heights, Very Low S.E. Canada/Hudson Bay Mean 500mb Heights, and High Pressure dominant Sea Level Pressure over the North Central Plains. These 4 Datasets since 1948 were put through Rotated Principle Components Analysis.

Two Principal Components had significant Eigenvalues of 1 or above and explained 79% of the Winter (NDJF) Pattern. The 1st Principle component explained 43.4% and was determined to be the predominant boreal mode of the East Pacific Oscillation (EPO). The 2nd Principle component explained 35.6% and was determined to be the Tropical/Northern Hemiphere (TNH) teleconnection.