Algorithms 1 Atlantic multidecadal variability 1 Atmosphere 1 Climate 1 Models, Theoretical 1 Oceans and Seas 1 Pacific decadal variability algorithm 1 article 1 atmosphere 1 climate 1 multidecadal variability 1 sea 1 sea surface temperature 1 sudden stratospheric warmings 1 theoretical model 1 warming 1 winter 1