A first estimate of present and preindustrial air-sea CO2 flux patterns based 
on ocean interior carbon measurements and models

Gloor, M.; Gruber, N.; Sarmiento, J.; Sabine, C. L.; Feely, R. A.; Rödenbeck, C.

doi:10.1029/2002GL015594

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A first estimate of present and preindustrial air-sea CO₂ flux patterns based on ocean interior carbon measurements and models

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Gloor, M.
Tall Tower Atmospheric Gas Measurements, Dr. J. Lavrič, Department Biogeochemical Systems, Prof. M. Heimann, Max Planck Institute for Biogeochemistry, Max Planck Society;

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Rödenbeck, C.
Inverse Data-driven Estimation, Dr. C. Rödenbeck, Department Biogeochemical Systems, Prof. M. Heimann, Max Planck Institute for Biogeochemistry, Max Planck Society;

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http://dx.doi.org/10.1029/2002GL015594
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Citation

Gloor, M., Gruber, N., Sarmiento, J., Sabine, C. L., Feely, R. A., & Rödenbeck, C. (2003). A first estimate of present and preindustrial air-sea CO₂ flux patterns based on ocean interior carbon measurements and models. Geophysical Research Letters, 30(1), 1010. doi:10.1029/2002GL015594.

Cite as: https://hdl.handle.net/11858/00-001M-0000-000E-D05A-1

Abstract

The exchange of CO₂ across the air-sea interface is a main determinant of the distribution of atmospheric CO₂ from which major conclusions about the carbon cycle are drawn, yet our knowledge of atmosphere-ocean fluxes still has major gaps. A new analysis based on recent ocean dissolved inorganic carbon data and on models permits us to separately estimate the preindustrial and present air-sea CO₂ flux distributions without requiring knowledge of the gas exchange coefficient. We find a smaller carbon sink at mid to high latitudes of the southern hemisphere than previous data based estimates and a shift of ocean uptake to lower latitude regions compared to estimates and simulations. The total uptake of anthropogenic CO₂ for 1990 is 1.8 (+/-0.4) Pg C yr(-1). Our ocean based results support the interpretation of the latitudinal distribution of atmospheric CO₂ data as evidence for a large northern hemisphere land carbon sink.