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Mean net terrestrial and oceanic flux (NEP plus fires; no fossil fuel emissions included) for the period 2001–2005 estimated from our system. Units are gC/m2/yr. Note that the flux patterns at 1° × 1° shown are the combination of 25 parameters optimized against atmospheric observations and 1° × 1° fluxes from mechanistic models. See Eq. 1 and the text for more details.
