SUMMARY AND CONCLUSION
The Pacific Decadal Oscillation was shown to relate to the frequency of El Ninos and La Ninas and through them to global temperatures.
The big question for the climate and seasonal weather over the future (years and decades) depends in part on whether the Pacific regime change first shown in 1998 and repeating now this time has legs. If it does, our climate will be characterized by more La Ninas and fewer El Ninos and further cooling. Those of you who were around before 1977 in the cold era with frequent La Ninas will have recognized the pattern this past winter and we will all get to see it more often than not in the years ahead.
Next week, will look at the Atlantic Multidecadal Oscillation. We will address how the PDO and AMO work together to influence hurricanes, global temperatures and arctic temperatures and sea ice.
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