Back to Chapter 4_12

The Trend Change in the Northern Pacific 1943! Why? Naval War?

Extract from: S. Rodionov, J. Overland, and N. Bond (2004) ; write:

Recent Regime Shifts on the Decadal Time Scale

The climate shift that occurred in the late 1970s was associated with an abrupt transition from a negative to a positive phase of the Pacific Decadal Oscillation (PDO). The PDO index tracks major, multidecadal changes in the North Pacific climate, often referred to as regimes (Mantua et al. 1997). In addition to these multidecadal regimes, the climate experiences minor, decadal-scale regimes. Minobe (1999) discusses a possible resonance between the regimes on these two time scales, which may lead to an amplification of the magnitude of a shift as in the mid-1940s and late 1970s.


What the authors not discuss is the simultaneous shift for DJF & JJA in the year 1943, while the two other shifts (at the end of the 1970s and 1989/1998) occurred in different years. Could the simultaneous shift in 1943 be linked to the naval activities in the Pacific since the ambush on Pearl Harbour in December 1941?

Chapter: 4_12

Book Page: 238a

File: 990_PDO_

Image: 2010/