The strange 60s step change between global temps and the AMO …

Something that’s been on my mind for a while is that strange relationship – or, to be more precise, that conspicuous correlative relationship – between the evolution of North Atlantic (70N-0, 80W-0) SST anomalies (the AMO, only with trend included) and the global temperature anomalies:

AMO1

Figure 1. Annual AMO (with trend imposed) vs. global temps (HadCRUt4, adjusted down 0.064 degrees post 1998) from 1860 to 2014. Continue reading