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SUMMARY:What will it take to avoid two degrees of warming -- the tale of t
 he trillionth tonne - Myles Allen (Oxford)
DTSTART:20091022T133000Z
DTEND:20091022T143000Z
UID:TALK18942@talks.cam.ac.uk
CONTACT:Christian Franzke
DESCRIPTION:I will explain why the traditional approach to framing climate
  change\npolicy in terms of long-term stabilization targets for atmospheri
 c\nconcentrations of greenhouse gases gives rise to some rather ill-posed\
 nscientific questions. Moving on from this\, I will explain how focusing\n
 on cumulative emissions of the longest-lived greenhouse gases provides a\n
 scientifically more robust basis for policy. Acknowledging the existence\n
 of an uncertain limit on the total amount of carbon dioxide we can\nreleas
 e into the atmosphere draws attention to the possibility that we\nwill fin
 d out\, too late\, that we have released too much. Under those\ncircumstan
 ces\, the only way left of avoiding dangerous climate change\nwould be art
 ificial draw-down of atmospheric carbon dioxide or other\,\neven more spec
 ulative\, forms of geo-engineering\, hazards of which I will\ndiscuss. Fin
 ally\, I will speculate on how a cap on cumulative carbon\ndioxide emissio
 ns might translate into an effective mitigation policy.
LOCATION:British Antarctic Survey\, conference room
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