The winters of the past two years have been noticeably colder. The northern hemisphere in particular has experienced record cold, record snow and a rebuilding of the Arctic sea ice extent. The southern hemisphere this winter has also seen record low temperatures in South America
which is resulting in many hundreds of deaths (human and livestock).
There are a number of players involved which can be attributed to this cooling trend and when they come together they are capable of dropping the world's temperatures by a significant amount.
Perhaps the most important player is the Pacific Decadal Oscillation (PDO) which is a hot and cold ocean temperature cycle in the Pacific of about 30 years. The world's temperature trend very closely matches this cycle which has the potential to override solar activity of the day. The last major PDO cooling event was between 1946 and 1976 which experienced the highest solar cycle on record (SC19) followed by a low cycle (SC20). The deepest cold of this era was recorded when both the PDO and low solar activity teamed up, which is right where we are again today with perhaps a greater influence from the solar side with my predicted imminent grand minimum.
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