Carbon model worksheet 3 answers

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A schematic of the organic and inorganic components of the modelled carbon cycle.

http://www.noc.soton.ac.uk/jmodels/images/wiki/cmodel.jpg
The article provides answers to the questions posed in the carbon model worksheet 3.

Worksheet answers

  1. Bicarbonate ion and dissolved CO2 gas (CO2(aq)) should increase (as a fraction or percentage of the total pool of DIC), as the pH drops below 8.2, while carbonate ion should decrease.
  2. (a) adding 1000 Gt C over a space of 400 years causes a maximum impact of ca. -0.2 units on pH, (b) 2000 Gt C causes pH to drop by a maximum of -0.4 units, 4000 Gt C by -0.7 units, and 8000 Gt C by -1 unit.
  3. (a) +10; (b) +20; (c) +50; (d) +110 μMol kg-1.
  4. (a) -80; (b) -120; (c) -150; (d) -180 μMol kg-1.
  5. (a) +190; (b) +290; (c) +390; (d) +450 μMol kg-1.

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References

External links