From: jtem01@gmail.com   
      
    Eric Stevens wrote:   
      
   > It is _one_ of the causes.   
      
   There's no one cause. A single VEI8 would plunge   
   the earth into an immediate winter, one that might   
   last a decade (at least) in the northern hemisphere,   
   growing the glaciers like wild fire. But, technically   
   it would be a tiny blip on the geologic clock.   
      
   These things begin with a change in the way the each   
   circulates it's energy from the sun. This predisposes   
   us towards ice ages. We then require other things like   
   orbital wobbles & the sun entering a weak phase...   
      
   To be honest, I'm not even sure those two could ever   
   cause a glacial period, not without the help of a   
   huge volcano or meteorite strike...   
      
   No, sorry, I fear a super volcanic eruption. Absent   
   on of those, there's no telling how long this   
   interglacial period might last.   
      
      
      
      
      
      
   -- --   
      
   http://jtem.tumblr.com/post/178056053008   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)