09_09_CNCycles - Natural Carbon Cycle is perturbed Natural...

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Unformatted text preview: Natural Carbon Cycle is perturbed Natural Carbon Cycle is perturbed 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 The Oceans are a ottleneck to CO2 The Oceans are a ottleneck to CO2 Bottleneck to CO2 uptake Bottleneck to CO2 uptake 200 years of fossil fuel emissions have penetrated only 1/4 of the way down e depths of the the depths of the ocean The additional CO2 has already caused acidification of the ceans (Cumulative) Sabine et al 2004 oceans CO 2 Emissions depend on energy scenarios CO 2 Emissions depend on energy scenarios Future emission scenarios: XnY X : global A1F1 A =global, B =regional development n : 1 =economic growth B2 g 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 Copyright 2007 by the National Academy of Sciences Raupach et al. (2007) Emission growth 2000 Emission growth 2000-2004 >3% per year ; faster than A1F1 2004 >3% per year ; faster than A1F1 Faster emissions for last 5 years Oceans cannot absorb the CO2 fast enough tmospheric CO2 will increase faster than predicted Atmospheric CO2 will increase faster than predicted Global warming will be faster than predicted Who Needs All the Lights? Who Needs All the Lights? THE NITROGEN CYCLE Nitrogen (N) is an element like carbon. All creatures need nitrogen to survive. There are huge amounts f nitrogen gas in the atmosphere but most of nitrogen gas in the atmosphere, but most animals and plants have no way of using it....
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09_09_CNCycles - Natural Carbon Cycle is perturbed Natural...

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