There is the old sun spot cycle with period of 11 years. Supposedly currently the rate of sun spots is increasing, and the peak will be in ~3 years. So, sun s

There is the old sun spot cycle with period of 11 years. Supposedly currently the rate of sun spots is increasing, and the peak will be in ~3 years. So, sun spots send out some particles. In addition there are cosmic rays from far outside our solar system. When cosmic rays hit the upper atmosphere, they cause the water vapor to form little water droplets which form clouds which have a net cooling effect. Sun spots, though, interfere with the cosmic rays and, thus, have a net warming effect. So, for the next ~3 years we will be getting some net warming from the increased rate of sun spots from the peak of the sun spot cycle.