As the Sun's activity varies so does it's magnetic field allowing more or less cosmic rays to interact with the Earth's atmosphere.
India's leading space physicist,U R Rao, has analysed 45 years of data and declared that the forcing from charged particles is higher than previously thought, at 1.1Wm-2, and human-forcing lower than the IPCC "consensus" of 1.6Wm-2.
The influence of charged particles on climate is controversial, not least because it's based on observation and physics experiments, rather than trick cycling computer modelling.
Very funny, when actual data become controversial in science and a model, however flawed has more consensus then a fact. I say society is to blame.
