Revision of the global carbon budget due to changing air-sea oxygen fluxes

Plattner, Gian-Kasper; Joos, Fortunat; Stocker, Thomas F. (2002). Revision of the global carbon budget due to changing air-sea oxygen fluxes. Global biogeochemical cycles, 16(4), pp. 43-51. American Geophysical Union 10.1029/2001GB001746

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Carbon budgets inferred from measurements of the atmospheric oxygen to nitrogen ratio (O2/N2) are revised considering sea-to-air fluxes of O2 and N2 in response to global warming and volcanic eruptions. Observational estimates of changes in ocean heat content are combined with a model-derived relationship between changes in atmospheric O2/N2 due to oceanic outgassing and heat fluxes to estimate ocean O2 outgassing. The inferred terrestrial carbon sink for the 1990s is reduced by a factor of two compared with the most recent estimate by the Intergovernmental Panel on Climate Change (IPCC). This also improves the agreement between calculated ocean carbon uptake rates and estimates from global carbon cycle models, which indicate a higher ocean carbon uptake during the 1990s than the 1980s. The simulated decrease in oceanic O2 concentrations is in qualitative agreement with observed trends in oceanic O2 concentrations.

Item Type:

Journal Article (Original Article)

Division/Institute:

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

UniBE Contributor:

Plattner, Gian-Kasper; Joos, Fortunat and Stocker, Thomas

Subjects:

500 Science > 530 Physics

ISSN:

0886-6236

Publisher:

American Geophysical Union

Language:

English

Submitter:

BORIS Import 2

Date Deposited:

08 Sep 2021 16:36

Last Modified:

05 Dec 2022 15:52

Publisher DOI:

10.1029/2001GB001746

BORIS DOI:

10.48350/158466

URI:

https://boris.unibe.ch/id/eprint/158466

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