Interesting recent research from Norway on solar-planetary theory introduced by one of the authors, Harald Yndestad.
The Sun and the gas giant planets [credit: Wikipedia]
The planets Jupiter, Saturn, Uranus and Neptune affect irradiation variability from the sun
Published: 20.aug. 2016 New Astronomy
By Harald Yndestad a), og Jan-Erik Solheim b)
a) Norwegian University of Science and Technology Aalesund, Aalesund 6025, Norway
b) Department of Physics and Technology UiT The Arctic, University of Norway, Tromsø 9037, Norway
Deterministic periods: Data series of total radiation (TSI) from the sun, has stationary periodic changes over 1000 years.
Cause: The periods are controlled by the four giant planets: Jupiter, Saturn, Uranus and Neptune.
Explanation: There is a mutual gravitation between the sun and the planets that change circulation in Sun’s interior dynamo.
Harmonic periods: Planets periods and combination resonance between periods produces a range of stationary periods from about 11 to 500 years, and more
Impact: The sum of the period affects the sun’s surface and alter the radiation from the sun and climate on Earth.
Historic Climate Change: The identified periods explains known cold climate periods Oort (1010-1030), Wolf (1270-1349), Spurs (1390-1550), Maunder (1640-1720) and Dalton (1790-1820)
Modern climate: We have had a modern maximum period (1940-2015) with radiation.
Prognosis: We are entering a period with less radiation, a “colder” sunny, with a calculated at a minimum of Dalton-level of approximately (2040-2065).