A factorial analysis of the marine carbon cycle and ocean circulation controls on atmospheric CO2
Article first published online: 30 DEC 2005
Copyright 2005 by the American Geophysical Union.
Global Biogeochemical Cycles
Volume 19, Issue 4, December 2005
How to Cite
2005), A factorial analysis of the marine carbon cycle and ocean circulation controls on atmospheric CO2, Global Biogeochem. Cycles, 19, GB4027, doi:10.1029/2005GB002489., , , , , and (
- Issue published online: 30 DEC 2005
- Article first published online: 30 DEC 2005
- Manuscript Accepted: 4 OCT 2005
- Manuscript Revised: 5 SEP 2005
- Manuscript Received: 17 FEB 2005
- atmospheric CO2;
- oceanic carbon pumps
 A factorial experiment with a new Earth system model of intermediate complexity is used to assess the sensitivity of atmospheric CO2 to organic, carbonate and solubility pumps, ocean circulation state, and climate feedback. An analysis of variance of the results reveals that the organic, carbonate, and solubility pumps act multiplicatively and account for 94% of the variance of atmospheric CO2. The organic pump explains 63% (89 ppm), the solubility pump 24% (55 ppm), the carbonate pump 6% (28 ppm), and ocean circulation 0.3% (12 ppm) of the variance. Removing all pumps increases atmospheric CO2 from 278 to 525 ppm. Including interactions with all the pumps increases the effects of ocean circulation from 12 to 56 ppm. However, the ocean circulation states used are unlikely to span the full range of possible states. Changes in Pacific circulation have more effect on atmospheric CO2 than Atlantic circulation.