Changes in solar activity have contributed no more than 10 per cent to global warming in the twentieth century, a new study has found.
The findings, made by Professor Terry Sloan at the University of Lancaster and Professor Sir Arnold Wolfendale at the University of Durham, find that neither changes in the activity of the Sun, nor its impact in blocking cosmic rays, can be a significant contributor to global warming.
The results have been published today, 8 November, in IOP Publishing's journal Environmental Research Letters.