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Global Warming Effects of increase CO 2

Global Warming Effects of increase CO 2. Carbon dioxide. Can we be completely sure that the climate changes we observe are caused by anthropogenic emissions of carbon dioxide?. But it is likely :. Climate Models Predictions. What do climate models lead us to expect?.

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Global Warming Effects of increase CO 2

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  1. Global WarmingEffects of increase CO2

  2. Carbon dioxide Can we be completely sure that the climate changes we observe are caused by anthropogenic emissions of carbon dioxide? But it is likely:

  3. Climate ModelsPredictions What do climate models lead us to expect?

  4. Climate ModelsWhat is the current effect of CO2 Average 240 W/m2 Average 240 W/m2 150 W/m2 On Average 390 W/m2 • A net extra ‘forcing’ of around 2 watts per square metre… + 2 W/m2

  5. An additional 2 watts per square metre of ‘radiative forcing’ • Scientific American March 2004

  6. Contributions toClimate Forcing Climate Forcing (W/m2) -1 0 +1

  7. Feedback Increased Climate Forcing Increased Water Vapour Positive Global Temperature More Evaporation Negative Decreased Climate Forcing Increased Cloud Cover Climate Forcing

  8. The Future… CO2 levels will rise • Very roughly, • If we make a 50% cut in GLOBAL emissions • CO2 will stabilise at twice historical levels • Probably the best we can hope for in the next century.

  9. IPCC Predictions…

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