After days of warmer than usual weather, a cold wind is blowing the mercury back down to normal. And at a time when all the talk has been of global warming, one scientist is predicting global cooling.

Tim Ball is a retired geography professor who has studied historic weather trends. He says the earth is actually coming to the end of a long warming cycle.

"We reached a peak I think around the 1940s, generally. When you look at the correct record, the better record of the satellites and tree rings and other stuff and the sun's pattern is such that we'll now go into a cooling trend."

Ball believes the recent trend towards warmer winters will be short-lived.

He says changes in solar patterns are responsible for climate change.

Ball also says burning fossil fuels has little impact on the weather.