Annual Global Primary Production



0            150           300           450
g C/m2/yr

Results when PBopt is estimated using the relationship between temperature
and the maximum phytoplankton specific growth rate as originally described by Eppley (1972) and modified for photosynthesis as described by Antoine et al. (1996):
Note the similarity between global productivity distributions for the calculations using
the VGPM and the results described by Antoine et al. (1996).
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