An assessment of the Atlantic and Arctic sea-air CO2 fluxes, 1990-2009

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Author(s) Schuster, U., McKinley, G.A., Bates, N., Chevallier, F., Doney, S.C., Fay, A.R., Gonzalez-Davila, M., Gruber, N., Jones, S., Krijnen, J., Landschutzer, P., Lefevre, N., Manizza, M., Mathis, J., Metzl, N., Olsen, A., Rios, A.F., Rodenbeck, C., Santana-Casiano, J.M., Takahashi, T., Wanninkhof, R., Watson, A.J.
Publication Type Journal Items, Publication Status: Published
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Title An assessment of the Atlantic and Arctic sea-air CO2 fluxes, 1990-2009
Author(s) Schuster, U.
McKinley, G.A.
Bates, N.
Chevallier, F.
Doney, S.C.
Fay, A.R.
Gonzalez-Davila, M.
Gruber, N.
Jones, S.
Krijnen, J.
Landschutzer, P.
Lefevre, N.
Manizza, M.
Mathis, J.
Metzl, N.
Olsen, A.
Rios, A.F.
Rodenbeck, C.
Santana-Casiano, J.M.
Takahashi, T.
Wanninkhof, R.
Watson, A.J.
Journal or Series Title Biogeosciences
Volume Number 10
Issue Number 1
Start Page 607
End Page 627
ISSN 1726-4170
Publisher Copernicus Gesellschaft
Publication Place Göttingen, Germany
Publication Date 2013
Abstract The Atlantic and Arctic Oceans are critical components of the global carbon cycle. Here we quantify the net sea-air CO2 flux, for the first time, across different methodologies for consistent time and space scales for the Atlantic and Arctic basins. We present the long-term mean, seasonal cycle, interannual variability and trends in sea-air CO2 flux for the period 1990 to 2009, and assign an uncertainty to each. We use regional cuts from global observations and modeling products, specifically a pCO(2)-based CO2 flux climatology, flux estimates from the inversion of oceanic and atmospheric data, and results from six ocean biogeochemical models. Additionally, we use basin-wide flux estimates from surface ocean pCO(2) observations based on two distinct methodologies. Our estimate of the contemporary sea-air flux of CO2 (sum of anthropogenic and natural components) by the Atlantic between 40 degrees S and 79 degrees N is -0.49 +/- 0.05 Pg C yr(-1), and by the Arctic it is -0.12 +/- 0.06 Pg C yr(-1), leading to a combined sea-air flux of -0.61 +/- 0.06 Pg C yr(-1) for the two decades (negative reflects ocean uptake). We do find broad agreement amongst methodologies with respect to the seasonal cycle in the subtropics of both hemispheres, but not elsewhere. Agreement with respect to detailed signals of interannual variability is poor, and correlations to the North Atlantic Oscillation are weaker in the North Atlantic and Arctic than in the equatorial region and southern subtropics. Linear trends for 1995 to 2009 indicate increased uptake and generally correspond between methodologies in the North Atlantic, but there is disagreement amongst methodologies in the equatorial region and southern subtropics.
DOI 10.5194/bg-10-607-2013
Document Type Article
Publication Status Published
Language English
Assigned Organisational Unit(s) 03731
Organisational Unit(s)
NEBIS System Number 006289717
Source Database ID WOS-000314173700039
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  author = "Schuster, U. and McKinley, G.A. and Bates, N. and Chevallier, F. and Doney, S.C. and Fay, A.R. and Gonzalez-Davila, M. and Gruber, N. and Jones, S. and Krijnen, J. and Landschutzer, P. and Lefevre, N. and Manizza, M. and Mathis, J. and Metzl, N. and Olsen, A. and Rios, A.F. and Rodenbeck, C. and Santana-Casiano, J.M. and Takahashi, T. and Wanninkhof, R. and Watson, A.J.",
  title = "{A}n assessment of the {A}tlantic and {A}rctic sea-air {C}{O}2 fluxes, 1990-2009",
  journal = "Biogeosciences",
  year = 2013,
  volume = "10",
  number = "1",
  pages = "607--627",

E-Citations record created: Mon, 04 Mar 2013, 11:06:52 CET