Lecture+9-11-08+Climate+Change

Lecture+9-11-08+Climate+Change - Natural Carbon Cycle is...

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Natural Carbon Cycle is perturbed … Natural Carbon Cycle is perturbed …
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The Land and Oceans have been absorbing half the CO2 emitted to the atmosphere The Land and Oceans have been absorbing half the CO2 emitted to the atmosphere
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The Oceans are a Bottleneck to CO2 uptake The Oceans are a Bottleneck to CO2 uptake (Cumulative) Sabine et al 2004 • 200 years of fossil fuel emissions have penetrated only 1/4 of the way down the depths of the ocean • The additional CO2 has already caused acidification of the oceans
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Copyright ©2007 by the National Academy of Sciences Raupach et al. (2007) Future emission scenarios: XnY ± X : A =global, B =regional development ± n : 1 =economic growth 2 =environ stewardship ± A1Y : A1 F1 : intensive dependence on FF A1 T : alternative technologies replace FF A1 B : balanced energy supply between FF and alternatives A1F1 B2 CO 2 Emissions depend on energy scenarios CO 2 Emissions depend on energy scenarios Emission growth 2000 Emission growth 2000 -2004 >3% per year ; faster than A1F1 2004 >3% per year ; faster than A1F1
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Who Needs All the Lights? Who Needs All the Lights? Faster emissions for last 5 years Oceans cannot absorb the CO2 fast enough Atmospheric CO2 will increase faster than predi Global warming will be faster than predicted
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Climate Change: How it happens and how it affects us.
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Lecture+9-11-08+Climate+Change - Natural Carbon Cycle is...

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