Extended Data Fig. 3: Variations in the seasonal evolution of dissolved iron.
From: Authigenic mineral phases as a driver of the upper-ocean iron cycle
DFe data and model solutions at the BATS site. Red crosses are DFe data for each voyage for three stations in the BATS region. All black lines are model solutions at the BATS site from the PISCES-Quota model, with total ligands derived from DOC (using 0.09 nM LT µM DOC−1) but with varying strengths of scavenging of free Fe by lithogenic particles. Blue lines represent model solutions from the new PISCES-Quota-Fe model, with either prognostic stronger ligands (solid line) or DOC-derived total ligands (dashed line, using 0.09 nM LT (µM DOC)−1). In red, we also compare the default PISCES-Quota (solid line, with total ligands derived from DOC using 0.09 nM LT µM DOC−1) and PISCES standard (dashed line) models. This demonstrates that there is little difference in the model–data mismatch in the seasonal evolution of DFe between PISCES-Quota and the standard PISCES model.
