[Illustrations, footnotes and references available in PDF version]
Significant climate variations during the past 7.5 millennia indicate that bicentennial quasi-periodic TSI variations define a corresponding cyclic mechanism of climatic changes from global warmings to Little Ice Ages and set the timescales of practically all physical processes taking place in the Sun-Earth system. Quasi-bicentennial cyclic variations of the TSI entering the Earth’s upper atmosphere are the main fundamental cause of corresponding alternations of climate variations. At the same time, more long-term variations of the annual average of the TSI due to changes in the shape of the Earth’s orbit, inclination of the Earth’s axis relative to its orbital plane, and precession, known as the astronomical Milankovitch cycles, together with the subsequent feedback effects, lead to the Big Glacial Periods (with the period of about 100,000 years).
The start of Grand Maunder-type Minimum of the TSI of the quasibicentennial cycle is anticipated in solar cycle 27±1 about the year 2043±11 and the beginning of the phase of deep cooling of the 19th Little Ice Age in the past 7,500 years in the year 2060±11 Figure 1, 2). Now we witness the transitional period from warming to deep cooling characterized by unstable climate changes when the global temperature will oscillate (approximately until 2014) around the maximum achieved in 1998-005. these prognoses are confirmed by the Sun itself and the course of global temperature changes and the level of the World ocean for the past 16 years. In general, by analogy with the seasons on Earth there is also a similar alternation of climatic conditions in the Solar System, dictated by the quasi-bicentennial cycle variation of the TSI.
From this point of view, ow the whole of our Solar System after season of the “solar summer” is moving to the season of the “solar autumn” and then will move to the season of the “solar winter” of the quasibicentennial solar cycle. There is simultaneous warming of the Earth, Mars and the whole Solar System which has a natural solar origin and confirms the action of “solar summer” throughout the Solar