@article{fdi:010080435,
  title = {{I}ron incorporation from seawater into {A}ntarctic sea ice : a model study},
  author = {{P}erson, {R}enaud and {V}ancoppenolle, {M}. and {A}umont, {O}livier},
  editor = {},
  language = {{ENG}},
  abstract = {{S}ea ice acts as an iron ({F}e) reservoir in the {S}outhern {O}cean ({SO}) where primary productivity is largely {F}e limited. {T}he mechanisms leading to {F}e enrichment in sea ice result from the combination of poorly understood and largely unexplored physical and biological processes. {W}e analyze the biogeochemical impacts of three plausible idealized formulations of dissolved {F}e ({DF}e) incorporation into sea ice corresponding to (i) constant {F}e concentration in sea ice, (ii) constant ocean-ice {F}e flux, and (iii) ocean-ice {F}e flux linearly varying with seawater {F}e concentration in a global ocean-sea-ice-biogeochemical model, focusing on the {SO}. {T}he three formulations simulate different geographical distributions of {DF}e concentrations in sea ice. {I}ron in sea ice remains largely uncertain due to the limited number of spatial and seasonal observations, poorly constrained {F}e sources and sinks, and significant uncertainties in simulated sea ice and hydrography. {D}espite these differences, the fertilization effect by sea ice on phytoplankton photosynthesis is qualitatively similar regardless of the formulation considered. {I}ron incorporation during sea-ice formation, transport, and melt release, common to all formulations, dominates over differences in sea-ice {F}e concentrations. {F}ormulating the {F}e incorporation rate as proportional to seawater {F}e concentrations gives the closest agreement to field observations. {W}ith this formulation, sediments work in synergy with {F}e transport to fertilize the waters north of the continental shelf. {S}outhern {O}cean primary production and export production increase by 5-10% and 9-19%, respectively, when {F}e incorporation into sea ice is considered, suggesting a moderate effect of {F}e-bearing sea ice on marine productivity.},
  keywords = {sea ice ; iron ; {S}outhern {O}cean ; biogeochemistry ; fertilization ; modeling ; {ANTARCTIQUE} ; {OCEAN} {AUSTRAL}},
  booktitle = {},
  journal = {{G}lobal {B}iogeochemical {C}ycles},
  volume = {34},
  numero = {11},
  pages = {e2020{GB}006665 [21 p.]},
  ISSN = {0886-6236},
  year = {2020},
  URL = {https://www.documentation.ird.fr/hor/fdi:010080435},
}