De Vries cycle links warming rate peaks to solar system frequencies

Back in 2009, Anthony Watts and Basil Copeland did a study of the HADcruT3 temperature series and found some periodicities in the rate of warming of Earth’s surface. They created a model which achieved a reasonably good match: Shown in Figure 6, the sinusoidal fit results in periods of 20.68, 9.22, 15.07 and 54.56 years, … Continue reading De Vries cycle links warming rate peaks to solar system frequencies