The global carbon cycle, showing
the carbon stocks in reservoirs (in Gt C = 1015 g C) and carbon flows
(in Gt C yr-1
) relevant to the anthropogenic perturbation as annual
averages over the decade from 1989 to 1998 (Schimel et al.
Net ocean uptake of the anthropogenic perturbation equals the net air-sea
input plus runoff minus sedimentation (discussed by Sarmiento and Sundquist,
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