Valentina Zarkova, a professor of mathematics at the University of Northumbria, published a paper containing the first serious prediction of limiting solar activity that could affect human life. "I hope that global warming will be overcome by this effect and give humanity and Earth 30 years to sort out pollution, we've got".
Professor Zarkova believes that the sun undergoes cycles that periodically lead to low temperatures, and believes that this phenomenon caused the small ice age between 1645 and 1700, causing the Thames to freeze on several occasions.
During this cold period of history, astronomers have noticed far fewer sunspots visible on the solar surface. Zarkova believes that sunspot activity will soon slow again, causing a small ice age.
However, not all scientists agree with her claims. Michael Brown, associate professor of astronomy at Monash University in Australia, said the minimum sunspots may be due to other factors including volcanic eruptions