Authors: László Körtvélyessy
Affiliation: Observatory Kleve Germany
During the last 550 Ma, four sine-waves of the curve of the terrestrial temperature showed a clear anti-correlation with the cosmic ray flux which was measured via iron micro-meteorites. What caused this flux and how did this flux influence the climate? The Sun remained embedded in its galactic arm and it did not cross the four arms with their supernovae. However, calculations of the pressure-equilibrium of the Sun suggest the existence of a very long solar cycle in the range of 100 Ma. This would easily explain the higher temperature and the positive charge of an active Sun, which repulses the positive cosmic ray particles. This 100Ma-period is similar to the 11-year cycle but with an almost double of the terrestrial temperature-amplitude.