@article{fdi:010053876,
  title = {{L}abile {F}e({II}) concentrations in the {A}tlantic sector of the {S}outhern {O}cean along a transect from the subtropical domain to the {W}eddell {S}ea {G}yre},
  author = {{S}arthou, {G}. and {B}ucciarelli, {E}va and {C}hever, {F}. and {H}ansard, {S}. {P}. and {G}onzalez-{D}avila, {M}. and {S}antana-{C}asiano, {J}. {M}. and {P}lanchon, {F}. and {S}peich, {S}.},
  editor = {},
  language = {{ENG}},
  abstract = {{L}abile {F}e({II}) distributions were investigated in the {S}ub-{T}ropical {S}outh {A}tlantic and the {S}outhern {O}cean during the {BONUS}-{G}ood{H}ope cruise from 34 to 57 degrees {S} ({F}ebruary-{M}arch 2008). {C}oncentrations ranged from below the detection limit (0.009 n{M}) to values as high as 0.125 n{M}. {I}n the surface mixed layer, labile {F}e({II}) concentrations were always higher than the detection limit, with values higher than 0.060n{M} south of 47 degrees {S}, representing between 39% and 63% of dissolved {F}e ({DF}e). {A}pparent biological production of {F}e({II}) was evidenced. {A}t intermediate depth, local maxima were observed, with the highest values in the {S}ub-{T}ropical domain at around 200 m, and represented more than 70% of {DF}e. {R}emineralization processes were likely responsible for those sub-surface maxima. {B}elow 1500 m, concentrations were close to or below the detection limit, except at two stations (at the vicinity of the {A}gulhas ridge and in the north of the {W}eddell {S}ea {G}yre) where values remained as high as similar to 0.030-0.050 n{M}. {H}ydrothermal or sediment inputs may provide {F}e({II}) to these deep waters. {F}e({II}) half life times (t(1/2)) at 4 degrees {C} were measured in the upper and deep waters and ranged from 2.9 to 11.3 min, and from 10.0 to 72.3 min, respectively. {M}easured values compared quite well in the upper waters with theoretical values from two published models, but not in the deep waters. {T}his may be due to the lack of knowledge for some parameters in the models and/or to organic complexation of {F}e({II}) that impact its oxidation rates. {T}his study helped to considerably increase the {F}e({II}) data set in the {O}cean and to better understand the {F}e redox cycle.},
  keywords = {},
  booktitle = {},
  journal = {{B}iogeosciences},
  volume = {8},
  numero = {9},
  pages = {2461--2479},
  ISSN = {1726-4170},
  year = {2011},
  DOI = {10.5194/bg-8-2461-2011},
  URL = {https://www.documentation.ird.fr/hor/fdi:010053876},
}