Professor Valentina Zharkova gave a presentation of her Climate and the Solar Magnetic Field hypothesis at the Global Warming Policy Foundation in October, 2018.
Zharkova models solar sunspot and magnetic activity. Her models have run at a 93% accuracy and her findings suggest a Super Grand Solar Minimum could begin in 2020.
A Super Grand Solar Minimum would have four magnetic fields out of phase. There was about 40-60 years of cold weather 350 years ago. This was a Maunder Minimum of lower solar activity. The historical cold weather had two magnetic fields out of phase.
Zharkova is predicting a cooling effect that is 2.5 to 4 times larger than the Maunder minimum. Zharkova’s analysis shows an 8 watts per square meter decrease in TSI (Total Solar Irradiance). A 2015 Nature study looked at 2 watts per square meter decrease causing a 0.13-degree celsius effect. A four times larger effect would be 0.5-degree celsius.
Zharkova believes the warming models are including the warming effect of increased solar activity. If she is correct there would be cooling and the warming models would be wrong.
Numerous studies have identified links between past climate and solar variability. During the Maunder Minimum (1645-1715), very few sunspots were seen despite regular observations. If the past relationships between TSI and ultraviolet irradiance and sunspots are the same as are observed for modern solar variability, then a decline in both TSI and ultraviolet for this period can be assumed. The Maunder Minimum coincided with more severe winters in the UK and continental Europe and many reconstructions suggest atmospheric conditions were broadly comparable with the regional effects on European atmospheric circulation found here. Some modeling studies also support the idea that similar regional cooling and circulation changes occurred during this period.
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