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A factorial analysis of the marine carbon cycle and ocean circulation controls on atmospheric CO 2
Author(s) -
Cameron David R.,
Lenton Timothy M.,
Ridgwell Andy J.,
Shepherd John G.,
Marsh Robert,
Yool Andrew
Publication year - 2005
Publication title -
global biogeochemical cycles
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.512
H-Index - 187
eISSN - 1944-9224
pISSN - 0886-6236
DOI - 10.1029/2005gb002489
Subject(s) - carbonate , carbon cycle , environmental science , solubility , atmospheric circulation , ocean current , circulation (fluid dynamics) , factorial experiment , total organic carbon , oceanography , carbon dioxide , atmospheric sciences , climatology , chemistry , environmental chemistry , geology , thermodynamics , ecology , physics , statistics , mathematics , organic chemistry , ecosystem , biology
A factorial experiment with a new Earth system model of intermediate complexity is used to assess the sensitivity of atmospheric CO 2 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 CO 2 . 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 CO 2 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 CO 2 than Atlantic circulation.