Auxiliary material for Paper 2008GB003349 Oceanic sources, sinks, and transport of atmospheric CO2 Nicolas Gruber Environmental Physics, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, Zurich, Switzerland M. Gloor Earth and Biosphere Institute and School of Geography, University of Leeds, Leeds, UK S. E. Mikaloff Fletcher Program in Atmospheric and Oceanic Sciences, Princeton University, Princeton, New Jersey, USA S. C. Doney Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts, USA S. Dutkiewicz and M. Follows Department of Earth, Atmosphere, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA M. Gerber Climate and Environmental Physics, Physics Institute, University of Bern, Bern, Switzerland A. R. Jacobson NOAA Earth System Research Laboratory, Global Monitoring Division, Boulder, Colorado, USA F. Joos Climate and Environmental Physics, Physics Institute, University of Bern, Bern, Switzerland Oeschger Centre for Climate Change Research, University of Bern, Bern, Switzerland K. Lindsay Climate and Global Dynamics, National Center for Atmospheric Research, Boulder, Colorado, USA D. Menemenlis Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA A. Mouchet Astrophysics and Geophysics Institute, University of Liege, Liege, Belgium S. A. Mueller Climate and Environmental Physics, Physics Institute, University of Bern, Bern, Switzerland Now at Department of Earth and Environmental Sciences, Open University, Milton Keynes, UK J. L. Sarmiento Program in Atmospheric and Oceanic Sciences, Princeton University, Princeton, New Jersey, USA T. Takahashi Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York, USA Complete citation: Gruber, N., et al. (2009), Oceanic sources, sinks, and transport of atmospheric CO2, Global Biogeochem. Cycles, 23, GB1005, doi:10.1029/2008GB003349. Introduction This auxiliary material contains (1) an appendix describing the treatment of the river-carbon derived air-sea CO2 fluxes, (2) a table summarizing the inversely estimated fluxes, and (3) three figures. A pdf file containing the entire auxiliary material is included as well. 1. 2008gb003349_txts01.txt Description of how the derived air-sea CO2 fluxes were estimated. 2. 2008gb003349_ts01.txt The numerical values of the air-sea fluxes for the different ocean regions. Inverse estimates of the air-sea fluxes of natural, anthropogenic, and river derived CO2 for the 23 regions resolved by the ocean inversion (see Figure 1 in main text). Also listed is the sum of the three components, i.e., the contemporary CO2 flux, in comparison with the estimates based on the pCO2 climatology ofTakahashi et al. (2008). Positive fluxes indicate outgassing. 3. 2008gb003349_fs01.eps Contemporary flux estimates of each of the 10 models that participated in the Ocean Inversion Project. The grey bar denotes the weighted mean of all models. For clarity, the fluxes have beenpost-aggregated from the original 23 regions to the 11 regions shown here. Positive fluxes denote outgassing. 4. 2008gb003349_fs02.eps Comparison of the contemporary air-sea fluxes estimated by the ocean inversion with the estimates based on three editions of the pCO2 climatology. Shown are the flux estimates from the pCO2 climatologies of Takahashi et al. (1999), Takahashi et al. (2002), and Takahashi et al., (2008). It turns out that each subsequent edition of the climatology resulted in a better agreement with the ocean inverse estimates. Positive fluxes denote outgassing. 5. 2008gb003349_fs03.eps Comparison of meridional ocean carbon transports in the Atlantic basin. (a) Anthropogenic carbon transport, (b) natural carbon transport and (c) contemporary carbon transport. Hydrography-based estimates are shown by symbols, while the solid lines indicate the transport estimates inferred from the ocean inversion and the dash-dot line in (c) depicts the pCO2 based transport estimate (see main text for methods). All transport estimates are shown relative to a Bering Strait throughflow of zero, i.e., the Bering Strait throughflow transport has been removed from all estimates that considered this transport. H98: Holfort et al. [1998]; M03: Macdonald et al. [2003]; A03: Alvarez et al. [2003]; KP95: Keeling and Peng [1995]; BP92: Broecker and Peng [1992] (as adjusted by KP95); S96: Stoll et al. [1996]; Br89: Brewer et al. [1989]. The natural and contemporary carbon transport estimates by Alvarez et al. [2003] at 24.5N are outside the plot, but indicated by the arrows with numbers. References Alvarez, M., A. F. Rios, F. F. Perez, H. L. Bryden, and G. 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