ATMOSPHERE LAND PLANTS SOIL ORGANIC MATTER OCEANS FOSSIL FUEL

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Presentation transcript:

ATMOSPHERE LAND PLANTS SOIL ORGANIC MATTER OCEANS FOSSIL FUEL 1500 GT C 560 GT C 38,000 GT C LAND PLANTS OCEANS SOIL ORGANIC MATTER FOSSIL FUEL 4000 GT C 60 GT 2 GT Plant Respiration 120 GT Photosynthesis 6 GT Fossil fuel burning Decomposition Microbial Gaseous exchange driven by death and sinking of phytoplankton Net Destruction of vegetation 1.5 GT 720 GT C (350 ppm) ATMOSPHERE 3 GT/year increase in atmospheric C (1.5 ppm/year) ~2.5 GT/year unaccounted for in current cycle* Tyson Ochsner, 1998 6CO2 + 6H2O C6H12O6 +6O2 CO2 Arrows represent annual fluxes * Forests are often proposed as sinks for this “missing” C.

ATMOSPHERE LAND PLANTS SOIL ORGANIC MATTER OCEANS FOSSIL FUEL 1500 GT C 560 GT C 38,000 GT C LAND PLANTS OCEANS SOIL ORGANIC MATTER FOSSIL FUEL 4000 GT C 60 GT 2 GT Plant Respiration 120 GT Photosynthesis 6 GT Fossil fuel burning Decomposition Microbial Gaseous exchange driven by death and sinking of phytoplankton Net Destruction of vegetation 1.5 GT 720 GT C (350 ppm) ATMOSPHERE 3 GT/year increase in atmospheric C (1.5 ppm/year) ~2.5 GT/year unaccounted for in current cycle* Tyson Ochsner, 1998 6CO2 + 6H2O C6H12O6 +6O2 CO2 Arrows represent annual fluxes * Forests are are often proposed as sinks for this “missing” C.