The Carbon Cycle Tyler Szwarc and Eliana Manangon

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Presentation transcript:

The Carbon Cycle Tyler Szwarc and Eliana Manangon

Atmosphere Primarily in the form of CO 2 and smaller amounts of CH 4 Reservoir: ~ 6 x kg Flux: 1.25 x kg/yr 2 yrResidence time: 4 x 10 2 yr –Residence time is highly variable due to nature of atmosphere and its relationship to other reservoirs

Hydrosphere Inorganic carbon exchange controls the pH C is exchanged between the hydrosphere and atmosphere Dissolved Ca +2 and carbonate ions are used by shells and crustaceous to build their skeletons Oceans have 3.8 x10 16 kg C Flux = ~2.2 x kg/yr Residence Time = 1.7 x 10 4 yr Takahashi et.al, Global sea–air CO 2 ﬂux based on climatological surface ocean pCO2, and seasonal biological and temperature effects, Deep-Sea Research, volume II issue 49, 2002, pp 1601–1622.

Lithosphere Reservoirs: Sedimentary rock, fossil fuels, and plants (1 x kg total) Flux assumptions: –Carbon rich sedimentation occurring on 25% of Earth’s surface –Accumulates at 0.2 mm/yr, 2710 kg/m 3 –Carbon accounts for ~12% of total rock mass –Flux = ~8.2 x kg/yr Residence Time = 1.2 x 10 7 yr

ReservoirSize (10 16 kg) Flux (10 12 kg/yr) Residence Time (yr) Atmosphere x 10 2 Ocean x 10 4 Lithosphere6,600 – 10, x 10 7 Fossil Fuel0.40^^ Soil0.15^^ Plants0.05^^ Reservoirs, Flux, and Residence Times Pidwirny, M. (2006). "The Carbon Cycle". Fundamentals of Physical Geography, 2nd Edition. Date Viewed.