Anyone curious as to how the Sun effects the climate, there is an excellent book called ‘The Chilling Stars’. It explains how it is actually the Sun, more specifically the Heliosphere that impacts the number of Galactic Cosmic Rays reaching the Earth’s lower atmosphere. And how these GCR’s create the building blocks of clouds. Less GCR’s reaching the Earth, means more clouds, greater albedo, and lower temperatures. Fewer GCR’s reaching the Earth, means fewer clouds, and lower albedo, and higher temperatures.