There's also a theory that a period of non-standard warming at the beginning of a glaciation period will possibly cause a faster eventual cooling, and possibly

There's also a theory that a period of non-standard warming at the beginning of a glaciation period will possibly cause a faster eventual cooling, and possibly a more severe glaciation, especially in Europe. Mostly due to altered ocean currents such as the "Great Ocean Conveyor". Pretty sure this has been modelled, but it's still being debated. http://science.nasa.gov/science-news/science-at-nasa/2004/05mar_arctic/ http://science.nasa.gov/science-news/science-at-nasa/2004/05... http://en.wikipedia.org/wiki/Thermohaline_circulation#Effects_on_global_climate http://en.wikipedia.org/wiki/Thermohaline_circulation#Effect...