I read this article a couple years ago, and was fascinated by the implications.....now with the release of the new film "Day after tomarrow" it is getting more attention.
http://www.discover.com/web-exclusiv...fter-tomorrow/
The evidence is compelling, and I don't know about your neck of the woods, but this was one of several recent, "really bad" winters here in New York. Perhaps there is something to pay attention to here.