lecture_0120

lecture_0120 - Biogeochemical cycles EES 103 20 JANUARY...

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EES 103 20 JANUARY 2011 Biogeochemical cycles
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Key players Structural spheres Lithosphere Atmosphere Hydrosphere Biosphere Nutrients Carbon Nitrogen Phosphorus Others…
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Carbon Key properties In all living things Key natural processes Photosynthesis Net primary production Respiration
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Stocks of carbon Atmosphere numbers to know : preindustrial & current concentration Ocean Land Rock Fossil fuels Biota atmosphere land ocean
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Historic atmospheric carbon Clicker quiz : Why does the atmospheric concentration of carbon DECREASE when it is summer in the Northern Hemisphere? Discuss with 1-2 neighbors. A) fewer fossil fuels are burned in the Northern summer B) animal respiration decreases when it is warm in the Northern summer C) plant photosynthesis increases in the Northern summer
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Flows of carbon Uptake by plants Respiration Fossil fuel burning Decomposition/burial Runoff Deforestation
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lecture_0120 - Biogeochemical cycles EES 103 20 JANUARY...

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