Global Carbon Cycle

Directions

  1. Draw an landscape showing the reservoirs. Label the reservoirs.
  2. Use arrows to represent the fluxes that connect reservoirs. Label the arrows.
  3. When finished, check that you have correct number of reservoirs and fluxes.

Reservoirs

Where carbon and its compounds are stored or retained. Units are gigatons (1 x 109 tons) of carbon.

  1. Atmosphere - 778 Gtc
  2. Land plants - 610
  3. Soil and detritus - 1580
  4. Surface ocean - 1020
  5. Surface sediment - 150
  6. Dissolved organic carbon (oceanic) - 700
  7. Intermediate and deep ocean - 38,100

Fluxes

Movement of carbon. Units are gigatons of carbon per year.

  1. Atmosphere to surface ocean - 92
  2. Surface Ocean to atmosphere - 90
  3. Surface ocean to deep ocean - 92
  4. Deep ocean to Surface ocean - 100
  5. Atmosphere to Soil and detritus - 4
  6. Land use change to atmosphere - 1
  7. Deep ocean to surface sediments - 0.2
  8. Fossil fuel use and cement production - 6
  9. Dissolved organic carbon to deep ocean - 2

References: Strategic Plan for Climate Change Science Program. Final Report 2003. Figure 7-1.