@article{fdi:010085383,
  title = {{D}issolved iron patterns impacted by shallow hydrothermal sources along a transect through the {T}onga-{K}ermadec {A}rc},
  author = {{T}illiette, {C}. and {T}aillandier, {V}. and {B}ouruet-{A}ubertot, {P}. and {G}rima, {N}. and {M}aes, {C}hristophe and {M}ontanes, {M}. and {S}arthou, {G}. and {V}orrath, {M}. {E}. and {A}rnone, {V}. and {B}ressac, {M}. and {G}onzalez-{S}antana, {D}. and {G}azeau, {F}. and {G}uieu, {C}.},
  editor = {},
  language = {{ENG}},
  abstract = {{I}n the {W}estern {T}ropical {S}outh {P}acific, a hotspot of dinitrogen-fixing organisms has been identified. {T}he survival of these species depends on the availability of dissolved iron ({DF}e); however, the source of this {DF}e is still unclear. {DF}e was measured along a transect from 175 degrees {E} to 166 degrees {W} near 19-21 degrees {S}. {T}he distribution of {DF}e showed high spatial variability: low concentrations (similar to 0.2 nmol kg(-1)) in the {S}outh {P}acific gyre and high concentrations (up to 50 nmol kg(-1)) in the west of the {T}onga arc, indicating that this arc is a clear boundary between iron-poor and iron-rich waters. {A}n optimal multiparameter analysis was used to distinguish the relative importance of physical transport relative to non-conservative processes on the observed distribution. {T}his analysis demonstrated that the shallow hydrothermal sources present along the {T}onga-{K}ermadec arc are responsible for the high concentrations observed in the photic layer. {N}evertheless, in contrast to what has been observed for deep hydrothermal plumes, our results highlighted the rapid decrease in {DF}e concentrations near shallow hydrothermal sources. {T}his is likely due to a shorter residence time of surface water masses combined with several biogeochemical processes at play (precipitation, scavenging, biological uptake, and photoreduction). {T}his study clearly highlights the role of shallow hydrothermal sources on the {DF}e cycle within the {T}onga-{K}ermadec arc where a strong link to biological activity in surface waters can be assessed, despite the small but significant fraction of {DF}e ultimately stabilized. {I}t also emphasizes the need to consider the impact of these sources for a better understanding of the global iron cycle.},
  keywords = {dissolved iron ; e{OMP} ; hydrothermal sources ; western tropical south pacific ; biogeochemical processes ; iron cycle ; {PACIFIQUE} ; {ZONE} {TROPICALE} ; {TONGA} ; {KERMADEC}},
  booktitle = {},
  journal = {{G}lobal {B}iogeochemical {C}ycles},
  volume = {36},
  numero = {7},
  pages = {e2022{GB}007363 [27 ]},
  ISSN = {0886-6236},
  year = {2022},
  DOI = {10.1029/2022gb007363},
  URL = {https://www.documentation.ird.fr/hor/fdi:010085383},
}