Carbon model worksheet 2 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 2.

Worksheet answers

  1. (1) 282 ppm, (2) 975 ppm, (3) 1625 ppm, (4) 763 ppm, (5) 687 ppm, (6) 433 ppm (7) 429 ppm.
  2. No it does not return to the pre-industrial value, even after 0.2 million years. It is still 147 ppm higher.
  3. Initial depth of about 2.4 km. It goes shallower (ocean acidification). It takes ~62 ky to return to the original depth.
  4. Surface [DIC] increases from 2001 to 2439 μMol kg-1 (+438 μMol kg-1). Surface [Alk] increases from 2301 to 2720 μMol kg-1 (+419 μEquiv kg-1). Surface [CO3] increases from 209 to 211 μMol kg-1 (+2 μMol kg-1, i.e. about the same). Surface pH decreases from 8.16 to 8.07 (-0.09 units).

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