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High-resolution modern model run. (a) Net primary production (Mg C ha−1 yr−1), as generated by Sheffield dynamic global vegetation model (SDGVM). Erosion (equation (2.5)) and runoff (equation (2.8)) corrections are applied to (b) annual Ca + Mg flux (log10(mol Ca+Mg m−2 yr−1)) owing to weathering of silicate minerals. Corrections are multiplicative (equation (2.9)) rather than additive, so that zero flux is expected from grey grid points.
