ESM202Lecture6_2008

ESM202Lecture6_2008 - Global carbon cycle reservoirs fluxes...

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1 Global carbon cycle: reservoirs, fluxes and processes
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2 IPCC [2001]
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3 Global Carbon Cycle
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4 Carbon cycle – Role of biota Key processes: Photosynthesis Autotrophic respiration Aerobic oxidation Anaerobic oxidation Methanogenesis
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5 Reservoir sizes in pedagram or gigatons carbon Geological reservoir includes only estimated extractable reserves
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6 Carbon dioxide in glacial ice cores
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7 Carbon dioxide records from ice cores
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8 Carbon dioxide records: ice cores and measured
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9 Rise in Atmospheric CO 2
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10 What are the driving forces? Population growth Based on UN estimates collecting info from  every country using Census data Historical growth Policies
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Sources: World Resources Institute Underlying data source: U.S. DOE, Energy Information Administration, International Energy Annual 1999. Notes: Shows carbon emissions associated with fossil fuel combustion. Carbon Emissions Per Person Tons of Carbon, per person 5.60 0.53 0.25 0.24 U.S. Russia E.U. Japan China India Africa 0 1 2 3 4 5 6 2.72 2.40 2.40 World Average
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12 What are the driving forces? Economic growth Estimate growth rate country by country Rate of development? Constraints? Policies
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13 Transportation systems
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14 Carbon emissions from US industry
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15 What are the driving forces? Energy Requirements: Fuels that feed our system
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16 Fuel sources for power plants: coal, gas, oil, biomass
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17 What are the driving forces? Land Use Change Deforestation Mostly in tropical forests Reforestation Temperate forests now significantly managed Afforestation Land that was in other biomes now used for  forest
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18 Land Use Change
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19 Deforestation and Biomass burning
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Brazil 1975 2001 Source: UNEP
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