Uptake of excess CO2 by an outcrop-diffusion model of the ocean

Siegenthaler, Ulrich (1983). Uptake of excess CO2 by an outcrop-diffusion model of the ocean. Journal of Geophysical Research: Oceans, 88(C6), pp. 3599-3608. American Geophysical Union 10.1029/JC088iC06p03599

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A carbon cycle model is presented in which direct ventilation of intermediate and deep ocean waters in high latitudes is taken into account. The 1½-dimensional ocean model is an extension of a box-diffusion model including a deep-sea outcrop at the surface. If both are calibrated in a consistent way, the outcrop-diffusion ocean takes up more excess CO2 than the box-diffusion ocean because the outcropping deep water is essentially virgin as to fossil CO2. Two calibration methods are compared, using the distribution either of natural or of bomb-produced 14C. The latter leads to a higher oceanic uptake of excess CO2 than the former and to a better agreement with the observed atmospheric increase. Long-term model responses are also discussed.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Climate and Environmental Physics

Subjects:

500 Science > 530 Physics

ISSN:

2169-9275

Publisher:

American Geophysical Union

Language:

English

Submitter:

BORIS Import 2

Date Deposited:

30 Sep 2021 09:16

Last Modified:

30 Sep 2021 09:16

Publisher DOI:

10.1029/JC088iC06p03599

BORIS DOI:

10.48350/158709

URI:

https://boris.unibe.ch/id/eprint/158709

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