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Analytical relationships between atmospheric carbon dioxide, carbon emissions, and ocean processes

Analytical relationships between atmospheric carbon dioxide, carbon emissions, and ocean processes
Analytical relationships between atmospheric carbon dioxide, carbon emissions, and ocean processes
Carbon perturbations leading to an increase in atmospheric CO2 are partly offset by the carbon uptake by the oceans and the rest of the climate system. Atmospheric CO2 approaches a new equilibrium state, reached after ocean invasion ceases after typically 1000 years, given by PCO2 = P0exp(?I?/IB), where P0 and PCO2 are the initial and final partial pressures of atmospheric CO2, ?I? is a CO2 perturbation, and IB is the buffered carbon inventory of the air-sea system. The perturbation, ?I?, includes carbon emissions and changes in the terrestrial reservoir, as well as ocean changes in the surface carbon disequilibrium and fallout of organic soft tissue material. Changes in marine calcium carbonate, ?ICaCO3, lead to a more complex relationship with atmospheric CO2, where PCO2 is changed by the ratio PCO2 = P0{IO(A ? C)/(IO(A ? C) ? ?ICaCO3)} and then modified by a similar exponential relationship, where IO(A ? C) is the difference between the inventories of titration alkalinity and dissolved inorganic carbon. The overall atmospheric PCO2 response to a range of perturbations is sensitive to their nonlinear interactions, depending on the product of the separate amplification factors for each perturbation.
carbon dioxide, carbon cycle, ocean processes
0886-6236
GB3030-[12pp]
Goodwin, Philip
87dbb154-5c39-473a-8121-c794487ee1fd
Follows, Michael J.
12c723bc-f2f8-43f4-a309-bff6885b9c7c
Williams, Richard G.
2155309e-1c07-4365-b46a-04baeb2fb63c
Goodwin, Philip
87dbb154-5c39-473a-8121-c794487ee1fd
Follows, Michael J.
12c723bc-f2f8-43f4-a309-bff6885b9c7c
Williams, Richard G.
2155309e-1c07-4365-b46a-04baeb2fb63c

Goodwin, Philip, Follows, Michael J. and Williams, Richard G. (2008) Analytical relationships between atmospheric carbon dioxide, carbon emissions, and ocean processes. Global Biogeochemical Cycles, 22 (3), GB3030-[12pp]. (doi:10.1029/2008GB003184).

Record type: Article

Abstract

Carbon perturbations leading to an increase in atmospheric CO2 are partly offset by the carbon uptake by the oceans and the rest of the climate system. Atmospheric CO2 approaches a new equilibrium state, reached after ocean invasion ceases after typically 1000 years, given by PCO2 = P0exp(?I?/IB), where P0 and PCO2 are the initial and final partial pressures of atmospheric CO2, ?I? is a CO2 perturbation, and IB is the buffered carbon inventory of the air-sea system. The perturbation, ?I?, includes carbon emissions and changes in the terrestrial reservoir, as well as ocean changes in the surface carbon disequilibrium and fallout of organic soft tissue material. Changes in marine calcium carbonate, ?ICaCO3, lead to a more complex relationship with atmospheric CO2, where PCO2 is changed by the ratio PCO2 = P0{IO(A ? C)/(IO(A ? C) ? ?ICaCO3)} and then modified by a similar exponential relationship, where IO(A ? C) is the difference between the inventories of titration alkalinity and dissolved inorganic carbon. The overall atmospheric PCO2 response to a range of perturbations is sensitive to their nonlinear interactions, depending on the product of the separate amplification factors for each perturbation.

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More information

e-pub ahead of print date: 12 September 2008
Published date: September 2008
Keywords: carbon dioxide, carbon cycle, ocean processes
Organisations: Ocean and Earth Science

Identifiers

Local EPrints ID: 350515
URI: http://eprints.soton.ac.uk/id/eprint/350515
ISSN: 0886-6236
PURE UUID: 24a7bac6-2376-4b0b-ba31-f45a69819308

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Date deposited: 26 Mar 2013 10:20
Last modified: 16 Jul 2019 21:39

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Contributors

Author: Philip Goodwin
Author: Michael J. Follows
Author: Richard G. Williams

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