Modeled natural and excess radiocarbon: Sensitivities to the gas exchange formulation and ocean transport strength

Müller, S. A.; Joos, F.; Plattner, G.-K.; Edwards, N. R.; Stocker, T. F. (2008). Modeled natural and excess radiocarbon: Sensitivities to the gas exchange formulation and ocean transport strength. Global biogeochemical cycles, 22(3), n/a-n/a. Washington, D.C.: American Geophysical Union 10.1029/2007GB003065

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Observation-based surface ocean Δ14C distributions and regional inventories for excess, bomb-produced radiocarbon are compared with results of two ocean models of intermediate complexity. By applying current descriptions of the air-sea gas exchange the models produce similar column inventories for excess 14C among all basins. This result is robust across a wide range of transport parameter settings, but inconsistent with data-based inventories. In the absence of evidence of fundamentally different gas exchange mechanisms in the North Atlantic than in the other basins, we infer regional North Atlantic 14C inventories which are considerably smaller than previous estimates. The results further suggest that the gas exchange velocity field should be reduced by (19 ± 16)%, which corresponds to a global mean air-sea gas transfer rate for CO2 in seawater of 17.1 ± 3.3 cm h−1, to find good agreement of simulated quantities with a range of data-based metrics.

Item Type:

Journal Article (Original Article)

Division/Institute:

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

UniBE Contributor:

Müller, Simon, Joos, Fortunat, Plattner, Gian-Kasper, Stocker, Thomas

Subjects:

500 Science > 530 Physics

ISSN:

0886-6236

Publisher:

American Geophysical Union

Language:

English

Submitter:

Factscience Import

Date Deposited:

04 Oct 2013 15:23

Last Modified:

05 Dec 2022 14:25

Publisher DOI:

10.1029/2007GB003065

Web of Science ID:

000258150600002

BORIS DOI:

10.48350/37317

URI:

https://boris.unibe.ch/id/eprint/37317 (FactScience: 207491)

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