There is a new paper in Environmental Research Letters that give additional support to Henrik Svensmark’s cosmic ray hypothesis of climate change on Earth. The idea is basically this: the suns changing magnetic field has an influence on galactic cosmic rays, with a stronger magnetic field deflecting more cosmic rays and a weaker one allowing more into the solar system. The cosmic rays affect cloud formation on Earth by creating condensation nuclei. Here is a simplified block flowchart diagram of the process: